/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-tiling/pr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:17:17,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:17:17,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:17:17,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:17:17,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:17:17,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:17:17,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:17:17,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:17:17,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:17:17,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:17:17,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:17:17,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:17:17,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:17:17,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:17:17,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:17:17,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:17:17,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:17:17,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:17:17,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:17:17,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:17:17,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:17:17,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:17:17,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:17:17,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:17:17,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:17:17,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:17:17,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:17:17,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:17:17,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:17:17,952 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:17:17,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:17:17,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:17:17,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:17:17,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:17:17,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:17:17,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:17:17,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:17:17,955 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:17:17,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:17:17,955 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:17:17,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:17:17,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:17:17,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:17:17,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:17:17,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:17:17,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:17:17,956 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:17:17,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:17:17,956 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:17:17,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:17:17,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:17:17,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:17:17,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:17:17,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:17:17,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:17:17,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:17:17,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:17:17,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:17:17,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:17:17,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:17:17,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:17:17,959 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:17:17,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:17:17,959 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:17:17,959 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:17:18,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:17:18,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:17:18,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:17:18,200 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:17:18,201 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:17:18,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr5.c [2023-03-30 22:17:19,360 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:17:19,539 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:17:19,540 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c [2023-03-30 22:17:19,545 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/612542237/b72fc5e70ff64852ac49a1dac6118e7d/FLAG4955e2773 [2023-03-30 22:17:19,558 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/612542237/b72fc5e70ff64852ac49a1dac6118e7d [2023-03-30 22:17:19,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:17:19,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:17:19,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:17:19,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:17:19,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:17:19,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@360c21e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19, skipping insertion in model container [2023-03-30 22:17:19,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:17:19,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:17:19,727 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c[394,407] [2023-03-30 22:17:19,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:17:19,759 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:17:19,768 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c[394,407] [2023-03-30 22:17:19,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:17:19,790 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:17:19,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19 WrapperNode [2023-03-30 22:17:19,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:17:19,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:17:19,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:17:19,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:17:19,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,821 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:17:19,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:17:19,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:17:19,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:17:19,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (1/1) ... [2023-03-30 22:17:19,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:17:19,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:19,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:17:19,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:17:19,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:17:19,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:17:19,893 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:17:19,893 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:17:19,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:17:19,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:17:19,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:17:19,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:17:19,894 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:17:19,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:17:19,894 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:17:19,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:17:19,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:17:19,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:17:19,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:17:19,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:17:19,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:17:19,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:17:19,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:17:19,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:17:19,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:17:19,994 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:17:19,996 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:17:20,297 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:17:20,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:17:20,308 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-30 22:17:20,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:17:20 BoogieIcfgContainer [2023-03-30 22:17:20,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:17:20,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:17:20,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:17:20,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:17:20,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:17:19" (1/3) ... [2023-03-30 22:17:20,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c93b07c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:17:20, skipping insertion in model container [2023-03-30 22:17:20,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:17:19" (2/3) ... [2023-03-30 22:17:20,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c93b07c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:17:20, skipping insertion in model container [2023-03-30 22:17:20,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:17:20" (3/3) ... [2023-03-30 22:17:20,319 INFO L112 eAbstractionObserver]: Analyzing ICFG pr5.c [2023-03-30 22:17:20,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:17:20,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:17:20,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:17:20,383 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;@239cb9ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:17:20,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:17:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:17:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:17:20,394 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:20,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:20,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:20,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash -321625888, now seen corresponding path program 1 times [2023-03-30 22:17:20,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:20,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145087539] [2023-03-30 22:17:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:20,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:20,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:20,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145087539] [2023-03-30 22:17:20,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145087539] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:20,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:20,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:17:20,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607837374] [2023-03-30 22:17:20,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:20,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:17:20,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:20,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:17:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:17:20,695 INFO L87 Difference]: Start difference. First operand has 39 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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) [2023-03-30 22:17:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:20,833 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2023-03-30 22:17:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:17:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 22 [2023-03-30 22:17:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:20,841 INFO L225 Difference]: With dead ends: 67 [2023-03-30 22:17:20,842 INFO L226 Difference]: Without dead ends: 33 [2023-03-30 22:17:20,845 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 [2023-03-30 22:17:20,848 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:20,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-30 22:17:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-03-30 22:17:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:17:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-03-30 22:17:20,892 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2023-03-30 22:17:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:20,893 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-03-30 22:17:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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) [2023-03-30 22:17:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-03-30 22:17:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:17:20,895 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:20,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:20,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:17:20,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:20,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash -63460450, now seen corresponding path program 1 times [2023-03-30 22:17:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:20,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082666214] [2023-03-30 22:17:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:21,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:21,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082666214] [2023-03-30 22:17:21,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082666214] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:21,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:21,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:17:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419185961] [2023-03-30 22:17:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:21,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:17:21,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:17:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:17:21,211 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-30 22:17:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:21,357 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-03-30 22:17:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:17:21,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-03-30 22:17:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:21,360 INFO L225 Difference]: With dead ends: 41 [2023-03-30 22:17:21,360 INFO L226 Difference]: Without dead ends: 39 [2023-03-30 22:17:21,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:17:21,371 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:21,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 112 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-30 22:17:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-03-30 22:17:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:17:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-03-30 22:17:21,386 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 22 [2023-03-30 22:17:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:21,386 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-03-30 22:17:21,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-30 22:17:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-03-30 22:17:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:17:21,387 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:21,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:21,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:17:21,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:21,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash -61613408, now seen corresponding path program 1 times [2023-03-30 22:17:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:21,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501609825] [2023-03-30 22:17:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:21,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:21,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501609825] [2023-03-30 22:17:21,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501609825] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:21,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:21,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:17:21,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513749005] [2023-03-30 22:17:21,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:21,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:17:21,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:21,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:17:21,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:17:21,629 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:17:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:21,748 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2023-03-30 22:17:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:17:21,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-03-30 22:17:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:21,754 INFO L225 Difference]: With dead ends: 62 [2023-03-30 22:17:21,754 INFO L226 Difference]: Without dead ends: 45 [2023-03-30 22:17:21,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:17:21,761 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:21,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 22 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-03-30 22:17:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-03-30 22:17:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:17:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-03-30 22:17:21,784 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 22 [2023-03-30 22:17:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:21,785 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-03-30 22:17:21,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:17:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-03-30 22:17:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-30 22:17:21,787 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:21,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:21,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:17:21,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:21,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:21,788 INFO L85 PathProgramCache]: Analyzing trace with hash -97683673, now seen corresponding path program 1 times [2023-03-30 22:17:21,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:21,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677262809] [2023-03-30 22:17:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:21,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:21,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:21,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677262809] [2023-03-30 22:17:21,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677262809] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:21,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:21,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:17:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668433285] [2023-03-30 22:17:21,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:21,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:17:21,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:17:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:17:21,945 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:17:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:22,052 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2023-03-30 22:17:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:17:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-03-30 22:17:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:22,056 INFO L225 Difference]: With dead ends: 77 [2023-03-30 22:17:22,056 INFO L226 Difference]: Without dead ends: 53 [2023-03-30 22:17:22,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:17:22,060 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:22,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 47 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-03-30 22:17:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2023-03-30 22:17:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 37 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:17:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-03-30 22:17:22,074 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2023-03-30 22:17:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:22,074 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-03-30 22:17:22,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:17:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-03-30 22:17:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-30 22:17:22,075 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:22,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:22,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 22:17:22,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:22,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash -490710683, now seen corresponding path program 1 times [2023-03-30 22:17:22,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:22,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081145316] [2023-03-30 22:17:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:22,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:22,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:22,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:22,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:22,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081145316] [2023-03-30 22:17:22,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081145316] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679677797] [2023-03-30 22:17:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:22,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:22,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:22,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:17:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:22,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-30 22:17:22,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:22,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:22,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:22,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:22,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:22,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:23,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:23,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-03-30 22:17:23,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-03-30 22:17:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:23,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679677797] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:23,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:23,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 8] total 21 [2023-03-30 22:17:23,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391736732] [2023-03-30 22:17:23,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-30 22:17:23,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-30 22:17:23,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-03-30 22:17:23,267 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:17:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:23,890 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2023-03-30 22:17:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-30 22:17:23,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-03-30 22:17:23,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:23,892 INFO L225 Difference]: With dead ends: 100 [2023-03-30 22:17:23,892 INFO L226 Difference]: Without dead ends: 98 [2023-03-30 22:17:23,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2023-03-30 22:17:23,894 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 264 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:23,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 155 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:17:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-03-30 22:17:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2023-03-30 22:17:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:17:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-03-30 22:17:23,905 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2023-03-30 22:17:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:23,906 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-03-30 22:17:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:17:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-03-30 22:17:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-30 22:17:23,907 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:23,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:23,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:24,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:24,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:24,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:24,113 INFO L85 PathProgramCache]: Analyzing trace with hash 913433577, now seen corresponding path program 1 times [2023-03-30 22:17:24,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:24,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640224413] [2023-03-30 22:17:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:24,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:24,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:24,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640224413] [2023-03-30 22:17:24,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640224413] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549409579] [2023-03-30 22:17:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:24,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:24,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:24,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:24,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:17:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:24,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-30 22:17:24,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:24,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:24,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:24,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:24,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:24,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:24,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:17:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:24,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:25,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:17:25,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:17:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549409579] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:25,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:25,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2023-03-30 22:17:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297769706] [2023-03-30 22:17:25,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-30 22:17:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:25,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-30 22:17:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:17:25,068 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:17:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:25,793 INFO L93 Difference]: Finished difference Result 157 states and 220 transitions. [2023-03-30 22:17:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-30 22:17:25,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-03-30 22:17:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:25,795 INFO L225 Difference]: With dead ends: 157 [2023-03-30 22:17:25,795 INFO L226 Difference]: Without dead ends: 126 [2023-03-30 22:17:25,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2023-03-30 22:17:25,796 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 145 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:25,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 159 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:17:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-03-30 22:17:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 71. [2023-03-30 22:17:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 62 states have internal predecessors, (87), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:17:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2023-03-30 22:17:25,810 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 29 [2023-03-30 22:17:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:25,810 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2023-03-30 22:17:25,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:17:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2023-03-30 22:17:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-30 22:17:25,811 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:25,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:25,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:26,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-30 22:17:26,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:26,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:26,017 INFO L85 PathProgramCache]: Analyzing trace with hash -704661506, now seen corresponding path program 1 times [2023-03-30 22:17:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:26,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586038768] [2023-03-30 22:17:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:26,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:26,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:26,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:26,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586038768] [2023-03-30 22:17:26,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586038768] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:26,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:26,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:17:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778112559] [2023-03-30 22:17:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:26,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:17:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:17:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:26,067 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-03-30 22:17:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:26,138 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2023-03-30 22:17:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:17:26,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 36 [2023-03-30 22:17:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:26,139 INFO L225 Difference]: With dead ends: 93 [2023-03-30 22:17:26,139 INFO L226 Difference]: Without dead ends: 69 [2023-03-30 22:17:26,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:26,140 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:26,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 60 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-03-30 22:17:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2023-03-30 22:17:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 54 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:17:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2023-03-30 22:17:26,150 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 36 [2023-03-30 22:17:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:26,150 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2023-03-30 22:17:26,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-03-30 22:17:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2023-03-30 22:17:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 22:17:26,153 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:26,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:26,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-30 22:17:26,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:26,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash -735009978, now seen corresponding path program 1 times [2023-03-30 22:17:26,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:26,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702310343] [2023-03-30 22:17:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:26,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:26,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:26,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:26,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:26,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:26,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702310343] [2023-03-30 22:17:26,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702310343] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:26,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176015361] [2023-03-30 22:17:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:26,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:26,578 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:26,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:17:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:26,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-30 22:17:26,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:26,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:26,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:26,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:26,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:26,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:17:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:26,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:26,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-03-30 22:17:26,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-03-30 22:17:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:27,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176015361] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:27,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:27,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2023-03-30 22:17:27,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661633881] [2023-03-30 22:17:27,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:27,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-30 22:17:27,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:27,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-30 22:17:27,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-03-30 22:17:27,018 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:17:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:27,762 INFO L93 Difference]: Finished difference Result 305 states and 438 transitions. [2023-03-30 22:17:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:17:27,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2023-03-30 22:17:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:27,764 INFO L225 Difference]: With dead ends: 305 [2023-03-30 22:17:27,765 INFO L226 Difference]: Without dead ends: 262 [2023-03-30 22:17:27,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2023-03-30 22:17:27,767 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:27,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 115 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:17:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-03-30 22:17:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 121. [2023-03-30 22:17:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 111 states have internal predecessors, (159), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:17:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 170 transitions. [2023-03-30 22:17:27,795 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 170 transitions. Word has length 38 [2023-03-30 22:17:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:27,797 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 170 transitions. [2023-03-30 22:17:27,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:17:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 170 transitions. [2023-03-30 22:17:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 22:17:27,802 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:27,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:27,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:28,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:28,010 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:28,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:28,010 INFO L85 PathProgramCache]: Analyzing trace with hash -516155260, now seen corresponding path program 1 times [2023-03-30 22:17:28,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:28,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002196720] [2023-03-30 22:17:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:28,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 22:17:28,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:28,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002196720] [2023-03-30 22:17:28,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002196720] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:28,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:28,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:17:28,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154571084] [2023-03-30 22:17:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:28,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:17:28,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:17:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:17:28,092 INFO L87 Difference]: Start difference. First operand 121 states and 170 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:17:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:28,187 INFO L93 Difference]: Finished difference Result 173 states and 241 transitions. [2023-03-30 22:17:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:17:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-03-30 22:17:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:28,190 INFO L225 Difference]: With dead ends: 173 [2023-03-30 22:17:28,190 INFO L226 Difference]: Without dead ends: 129 [2023-03-30 22:17:28,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:17:28,192 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:28,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 65 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-03-30 22:17:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2023-03-30 22:17:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 110 states have (on average 1.3818181818181818) internal successors, (152), 111 states have internal predecessors, (152), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:17:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2023-03-30 22:17:28,209 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 38 [2023-03-30 22:17:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:28,210 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2023-03-30 22:17:28,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:17:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2023-03-30 22:17:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 22:17:28,211 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:28,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-30 22:17:28,211 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:28,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1333803710, now seen corresponding path program 1 times [2023-03-30 22:17:28,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:28,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330188669] [2023-03-30 22:17:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:28,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:28,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:28,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330188669] [2023-03-30 22:17:28,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330188669] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:28,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356398359] [2023-03-30 22:17:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:28,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:28,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:17:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:28,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-30 22:17:28,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:28,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:28,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:28,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:28,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:28,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:29,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:17:29,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:17:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:29,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356398359] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:29,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:29,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 24 [2023-03-30 22:17:29,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485975495] [2023-03-30 22:17:29,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:29,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-30 22:17:29,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-30 22:17:29,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:17:29,035 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-30 22:17:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:29,856 INFO L93 Difference]: Finished difference Result 280 states and 361 transitions. [2023-03-30 22:17:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:17:29,857 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2023-03-30 22:17:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:29,858 INFO L225 Difference]: With dead ends: 280 [2023-03-30 22:17:29,858 INFO L226 Difference]: Without dead ends: 278 [2023-03-30 22:17:29,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2023-03-30 22:17:29,860 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 101 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:29,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 205 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:17:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-03-30 22:17:29,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 177. [2023-03-30 22:17:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 157 states have (on average 1.3375796178343948) internal successors, (210), 161 states have internal predecessors, (210), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:17:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 231 transitions. [2023-03-30 22:17:29,885 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 231 transitions. Word has length 38 [2023-03-30 22:17:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:29,886 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 231 transitions. [2023-03-30 22:17:29,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-30 22:17:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 231 transitions. [2023-03-30 22:17:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-30 22:17:29,887 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:29,887 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-03-30 22:17:29,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:30,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:30,093 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:30,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1602894729, now seen corresponding path program 1 times [2023-03-30 22:17:30,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:30,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716985580] [2023-03-30 22:17:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-30 22:17:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 22:17:30,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716985580] [2023-03-30 22:17:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716985580] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:30,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:30,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:17:30,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727260070] [2023-03-30 22:17:30,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:30,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:17:30,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:30,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:17:30,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:30,139 INFO L87 Difference]: Start difference. First operand 177 states and 231 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-03-30 22:17:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:30,204 INFO L93 Difference]: Finished difference Result 195 states and 250 transitions. [2023-03-30 22:17:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:17:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 45 [2023-03-30 22:17:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:30,206 INFO L225 Difference]: With dead ends: 195 [2023-03-30 22:17:30,206 INFO L226 Difference]: Without dead ends: 152 [2023-03-30 22:17:30,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:30,207 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:30,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:17:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-03-30 22:17:30,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-03-30 22:17:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 136 states have internal predecessors, (174), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:17:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 195 transitions. [2023-03-30 22:17:30,226 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 195 transitions. Word has length 45 [2023-03-30 22:17:30,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:30,226 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 195 transitions. [2023-03-30 22:17:30,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-03-30 22:17:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 195 transitions. [2023-03-30 22:17:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-30 22:17:30,227 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:30,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-30 22:17:30,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:30,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 646899333, now seen corresponding path program 2 times [2023-03-30 22:17:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:30,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509464091] [2023-03-30 22:17:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:17:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:30,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:30,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509464091] [2023-03-30 22:17:30,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509464091] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:30,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633248914] [2023-03-30 22:17:30,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:17:30,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:30,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:30,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:30,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:17:30,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:17:30,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:17:30,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-30 22:17:30,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:30,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:30,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:30,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:31,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:17:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:31,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:31,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-03-30 22:17:31,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-03-30 22:17:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:31,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633248914] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:31,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:31,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 27 [2023-03-30 22:17:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472985794] [2023-03-30 22:17:31,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:31,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-30 22:17:31,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-30 22:17:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-03-30 22:17:31,313 INFO L87 Difference]: Start difference. First operand 152 states and 195 transitions. Second operand has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:17:33,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:35,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:37,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:39,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:42,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:44,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:45,236 INFO L93 Difference]: Finished difference Result 474 states and 607 transitions. [2023-03-30 22:17:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-03-30 22:17:45,237 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 47 [2023-03-30 22:17:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:45,239 INFO L225 Difference]: With dead ends: 474 [2023-03-30 22:17:45,239 INFO L226 Difference]: Without dead ends: 387 [2023-03-30 22:17:45,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=670, Invalid=3112, Unknown=0, NotChecked=0, Total=3782 [2023-03-30 22:17:45,242 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 368 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 241 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:45,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 284 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1193 Invalid, 6 Unknown, 0 Unchecked, 12.9s Time] [2023-03-30 22:17:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-03-30 22:17:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 220. [2023-03-30 22:17:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 189 states have (on average 1.2433862433862435) internal successors, (235), 196 states have internal predecessors, (235), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (17), 10 states have call predecessors, (17), 17 states have call successors, (17) [2023-03-30 22:17:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 270 transitions. [2023-03-30 22:17:45,279 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 270 transitions. Word has length 47 [2023-03-30 22:17:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:45,279 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 270 transitions. [2023-03-30 22:17:45,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:17:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 270 transitions. [2023-03-30 22:17:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-30 22:17:45,281 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:45,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:45,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:45,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 22:17:45,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:45,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:45,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1537632441, now seen corresponding path program 1 times [2023-03-30 22:17:45,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:45,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020258581] [2023-03-30 22:17:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:45,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:17:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:45,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:45,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020258581] [2023-03-30 22:17:45,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020258581] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:45,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834739391] [2023-03-30 22:17:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:45,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:45,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:45,833 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:45,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:17:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-30 22:17:45,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:45,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:45,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:46,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:17:46,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:46,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:17:46,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:17:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:17:46,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834739391] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:46,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:46,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 28 [2023-03-30 22:17:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425414885] [2023-03-30 22:17:46,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:46,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-03-30 22:17:46,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:46,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-03-30 22:17:46,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-03-30 22:17:46,502 INFO L87 Difference]: Start difference. First operand 220 states and 270 transitions. Second operand has 28 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:17:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:47,703 INFO L93 Difference]: Finished difference Result 430 states and 526 transitions. [2023-03-30 22:17:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-03-30 22:17:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 47 [2023-03-30 22:17:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:47,705 INFO L225 Difference]: With dead ends: 430 [2023-03-30 22:17:47,705 INFO L226 Difference]: Without dead ends: 428 [2023-03-30 22:17:47,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=331, Invalid=2119, Unknown=0, NotChecked=0, Total=2450 [2023-03-30 22:17:47,707 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 123 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:47,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 305 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:17:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-03-30 22:17:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 309. [2023-03-30 22:17:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 264 states have (on average 1.246212121212121) internal successors, (329), 276 states have internal predecessors, (329), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (25), 13 states have call predecessors, (25), 25 states have call successors, (25) [2023-03-30 22:17:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 380 transitions. [2023-03-30 22:17:47,767 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 380 transitions. Word has length 47 [2023-03-30 22:17:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:47,767 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 380 transitions. [2023-03-30 22:17:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:17:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 380 transitions. [2023-03-30 22:17:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-03-30 22:17:47,769 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:47,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-03-30 22:17:47,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:47,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:47,974 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:47,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:47,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1648920034, now seen corresponding path program 1 times [2023-03-30 22:17:47,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:47,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429641454] [2023-03-30 22:17:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:47,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-30 22:17:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-03-30 22:17:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:17:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:48,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429641454] [2023-03-30 22:17:48,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429641454] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:48,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:48,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:17:48,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532599575] [2023-03-30 22:17:48,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:48,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:17:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:17:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:48,020 INFO L87 Difference]: Start difference. First operand 309 states and 380 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-03-30 22:17:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:48,127 INFO L93 Difference]: Finished difference Result 479 states and 593 transitions. [2023-03-30 22:17:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:17:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 54 [2023-03-30 22:17:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:48,129 INFO L225 Difference]: With dead ends: 479 [2023-03-30 22:17:48,129 INFO L226 Difference]: Without dead ends: 355 [2023-03-30 22:17:48,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:48,131 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:48,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 46 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-03-30 22:17:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 321. [2023-03-30 22:17:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 276 states have (on average 1.2282608695652173) internal successors, (339), 288 states have internal predecessors, (339), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (25), 13 states have call predecessors, (25), 25 states have call successors, (25) [2023-03-30 22:17:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 390 transitions. [2023-03-30 22:17:48,181 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 390 transitions. Word has length 54 [2023-03-30 22:17:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:48,181 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 390 transitions. [2023-03-30 22:17:48,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-03-30 22:17:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 390 transitions. [2023-03-30 22:17:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-30 22:17:48,182 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:48,182 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:48,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-03-30 22:17:48,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:48,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash -190916058, now seen corresponding path program 3 times [2023-03-30 22:17:48,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:48,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712260599] [2023-03-30 22:17:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:48,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:17:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:17:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:17:48,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:48,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712260599] [2023-03-30 22:17:48,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712260599] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:48,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726614054] [2023-03-30 22:17:48,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:17:48,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:48,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:48,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:48,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:17:48,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:17:48,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:17:48,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-30 22:17:48,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:48,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:48,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:48,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:48,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:48,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:48,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:17:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-30 22:17:48,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:48,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:17:48,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-03-30 22:17:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-03-30 22:17:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726614054] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:49,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:49,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2023-03-30 22:17:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600719654] [2023-03-30 22:17:49,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:49,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-30 22:17:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:49,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-30 22:17:49,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-03-30 22:17:49,048 INFO L87 Difference]: Start difference. First operand 321 states and 390 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-03-30 22:17:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:50,222 INFO L93 Difference]: Finished difference Result 612 states and 747 transitions. [2023-03-30 22:17:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-03-30 22:17:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 56 [2023-03-30 22:17:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:50,227 INFO L225 Difference]: With dead ends: 612 [2023-03-30 22:17:50,227 INFO L226 Difference]: Without dead ends: 499 [2023-03-30 22:17:50,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=2089, Unknown=0, NotChecked=0, Total=2550 [2023-03-30 22:17:50,233 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 325 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:50,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 233 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:17:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-03-30 22:17:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 331. [2023-03-30 22:17:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 284 states have (on average 1.2077464788732395) internal successors, (343), 297 states have internal predecessors, (343), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (27), 14 states have call predecessors, (27), 27 states have call successors, (27) [2023-03-30 22:17:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 398 transitions. [2023-03-30 22:17:50,298 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 398 transitions. Word has length 56 [2023-03-30 22:17:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:50,298 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 398 transitions. [2023-03-30 22:17:50,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-03-30 22:17:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 398 transitions. [2023-03-30 22:17:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-30 22:17:50,299 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:50,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:50,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:50,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:50,505 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:50,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -945515742, now seen corresponding path program 1 times [2023-03-30 22:17:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:50,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571366467] [2023-03-30 22:17:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:50,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:50,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:50,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:50,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:17:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:50,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:17:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:17:50,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:50,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571366467] [2023-03-30 22:17:50,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571366467] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:50,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786145312] [2023-03-30 22:17:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:50,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:50,813 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:50,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:17:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:50,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-30 22:17:50,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:50,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:50,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:17:51,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:17:51,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:17:51,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2023-03-30 22:17:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:17:51,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:51,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:17:51,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:17:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:17:51,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786145312] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:51,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:51,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 28 [2023-03-30 22:17:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921526762] [2023-03-30 22:17:51,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:51,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-03-30 22:17:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-03-30 22:17:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-03-30 22:17:51,499 INFO L87 Difference]: Start difference. First operand 331 states and 398 transitions. Second operand has 28 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 10 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-03-30 22:17:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:53,256 INFO L93 Difference]: Finished difference Result 716 states and 866 transitions. [2023-03-30 22:17:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-30 22:17:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 10 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 56 [2023-03-30 22:17:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:53,259 INFO L225 Difference]: With dead ends: 716 [2023-03-30 22:17:53,259 INFO L226 Difference]: Without dead ends: 714 [2023-03-30 22:17:53,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=571, Invalid=3719, Unknown=0, NotChecked=0, Total=4290 [2023-03-30 22:17:53,261 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 130 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:53,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 359 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 22:17:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-03-30 22:17:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 473. [2023-03-30 22:17:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 404 states have (on average 1.2128712871287128) internal successors, (490), 424 states have internal predecessors, (490), 43 states have call successors, (43), 26 states have call predecessors, (43), 25 states have return successors, (42), 22 states have call predecessors, (42), 42 states have call successors, (42) [2023-03-30 22:17:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 575 transitions. [2023-03-30 22:17:53,347 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 575 transitions. Word has length 56 [2023-03-30 22:17:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:53,348 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 575 transitions. [2023-03-30 22:17:53,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 10 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-03-30 22:17:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 575 transitions. [2023-03-30 22:17:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-03-30 22:17:53,350 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:53,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:17:53,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:53,555 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,SelfDestructingSolverStorable15 [2023-03-30 22:17:53,555 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:53,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:53,556 INFO L85 PathProgramCache]: Analyzing trace with hash -229198487, now seen corresponding path program 2 times [2023-03-30 22:17:53,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:53,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939045011] [2023-03-30 22:17:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:53,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:53,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:53,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:53,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-03-30 22:17:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:53,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-30 22:17:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-03-30 22:17:53,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:53,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939045011] [2023-03-30 22:17:53,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939045011] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:53,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:53,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:17:53,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832132424] [2023-03-30 22:17:53,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:53,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:17:53,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:17:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:53,611 INFO L87 Difference]: Start difference. First operand 473 states and 575 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-03-30 22:17:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:53,747 INFO L93 Difference]: Finished difference Result 530 states and 639 transitions. [2023-03-30 22:17:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:17:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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 61 [2023-03-30 22:17:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:53,749 INFO L225 Difference]: With dead ends: 530 [2023-03-30 22:17:53,750 INFO L226 Difference]: Without dead ends: 389 [2023-03-30 22:17:53,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:53,750 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:53,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 61 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-03-30 22:17:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 372. [2023-03-30 22:17:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 317 states have (on average 1.2018927444794953) internal successors, (381), 332 states have internal predecessors, (381), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (33), 18 states have call predecessors, (33), 33 states have call successors, (33) [2023-03-30 22:17:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 448 transitions. [2023-03-30 22:17:53,815 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 448 transitions. Word has length 61 [2023-03-30 22:17:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:53,815 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 448 transitions. [2023-03-30 22:17:53,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-03-30 22:17:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 448 transitions. [2023-03-30 22:17:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-30 22:17:53,816 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:53,817 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:53,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-03-30 22:17:53,817 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:53,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash -113196633, now seen corresponding path program 4 times [2023-03-30 22:17:53,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:53,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72226905] [2023-03-30 22:17:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:17:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:17:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-30 22:17:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:17:54,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:54,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72226905] [2023-03-30 22:17:54,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72226905] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:54,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829465777] [2023-03-30 22:17:54,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:17:54,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:54,094 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:54,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:17:54,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:17:54,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:17:54,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-30 22:17:54,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:54,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:17:54,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:54,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-30 22:17:54,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:17:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:17:54,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829465777] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:54,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:54,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 12] total 28 [2023-03-30 22:17:54,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661161116] [2023-03-30 22:17:54,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:54,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-03-30 22:17:54,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:54,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-03-30 22:17:54,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-03-30 22:17:54,771 INFO L87 Difference]: Start difference. First operand 372 states and 448 transitions. Second operand has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 12 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-03-30 22:17:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:57,416 INFO L93 Difference]: Finished difference Result 1031 states and 1245 transitions. [2023-03-30 22:17:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-03-30 22:17:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 12 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 65 [2023-03-30 22:17:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:57,421 INFO L225 Difference]: With dead ends: 1031 [2023-03-30 22:17:57,421 INFO L226 Difference]: Without dead ends: 1029 [2023-03-30 22:17:57,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=840, Invalid=6132, Unknown=0, NotChecked=0, Total=6972 [2023-03-30 22:17:57,423 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 151 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 3202 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 3202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:57,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 501 Invalid, 3514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 3202 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 22:17:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2023-03-30 22:17:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 696. [2023-03-30 22:17:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 585 states have (on average 1.2017094017094017) internal successors, (703), 615 states have internal predecessors, (703), 72 states have call successors, (72), 39 states have call predecessors, (72), 38 states have return successors, (71), 41 states have call predecessors, (71), 71 states have call successors, (71) [2023-03-30 22:17:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 846 transitions. [2023-03-30 22:17:57,582 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 846 transitions. Word has length 65 [2023-03-30 22:17:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:57,582 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 846 transitions. [2023-03-30 22:17:57,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 12 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-03-30 22:17:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 846 transitions. [2023-03-30 22:17:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-30 22:17:57,590 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:57,590 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:57,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:57,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-03-30 22:17:57,796 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:57,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1984035799, now seen corresponding path program 1 times [2023-03-30 22:17:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:57,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371956121] [2023-03-30 22:17:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:57,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:58,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:58,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:58,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:17:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:58,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:17:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:58,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:17:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:58,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-30 22:17:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:17:58,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371956121] [2023-03-30 22:17:58,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371956121] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:58,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231570094] [2023-03-30 22:17:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:58,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:58,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:58,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:58,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 22:17:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:58,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-30 22:17:58,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:58,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:17:58,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-30 22:17:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:17:58,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:58,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-03-30 22:17:58,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-03-30 22:17:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:17:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231570094] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:58,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:58,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 28 [2023-03-30 22:17:58,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107670361] [2023-03-30 22:17:58,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:58,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-03-30 22:17:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-03-30 22:17:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-03-30 22:17:58,660 INFO L87 Difference]: Start difference. First operand 696 states and 846 transitions. Second operand has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 27 states have internal predecessors, (101), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-03-30 22:18:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:01,244 INFO L93 Difference]: Finished difference Result 1186 states and 1437 transitions. [2023-03-30 22:18:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-03-30 22:18:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 27 states have internal predecessors, (101), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 65 [2023-03-30 22:18:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:01,249 INFO L225 Difference]: With dead ends: 1186 [2023-03-30 22:18:01,249 INFO L226 Difference]: Without dead ends: 1128 [2023-03-30 22:18:01,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1044, Invalid=5762, Unknown=0, NotChecked=0, Total=6806 [2023-03-30 22:18:01,251 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 338 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:01,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 316 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:18:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-03-30 22:18:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 796. [2023-03-30 22:18:01,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 662 states have (on average 1.188821752265861) internal successors, (787), 699 states have internal predecessors, (787), 95 states have call successors, (95), 39 states have call predecessors, (95), 38 states have return successors, (94), 57 states have call predecessors, (94), 94 states have call successors, (94) [2023-03-30 22:18:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 976 transitions. [2023-03-30 22:18:01,423 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 976 transitions. Word has length 65 [2023-03-30 22:18:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:01,423 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 976 transitions. [2023-03-30 22:18:01,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 27 states have internal predecessors, (101), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-03-30 22:18:01,424 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 976 transitions. [2023-03-30 22:18:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-03-30 22:18:01,426 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:01,426 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:18:01,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:01,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:01,632 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:01,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:01,633 INFO L85 PathProgramCache]: Analyzing trace with hash -560700092, now seen corresponding path program 5 times [2023-03-30 22:18:01,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:01,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409104501] [2023-03-30 22:18:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:01,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:02,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:02,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:18:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:02,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:18:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:02,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:18:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:02,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:18:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:02,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-30 22:18:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:02,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-03-30 22:18:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:18:02,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:02,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409104501] [2023-03-30 22:18:02,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409104501] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:02,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003262670] [2023-03-30 22:18:02,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:18:02,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:02,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:18:02,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 22:18:02,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-03-30 22:18:02,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:02,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:18:02,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:18:02,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:18:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:18:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003262670] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:18:02,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:18:02,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 35 [2023-03-30 22:18:02,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129451309] [2023-03-30 22:18:02,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:18:02,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-03-30 22:18:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:02,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-03-30 22:18:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 22:18:02,903 INFO L87 Difference]: Start difference. First operand 796 states and 976 transitions. Second operand has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-03-30 22:18:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:03,600 INFO L93 Difference]: Finished difference Result 1343 states and 1596 transitions. [2023-03-30 22:18:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-30 22:18:03,601 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 74 [2023-03-30 22:18:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:03,604 INFO L225 Difference]: With dead ends: 1343 [2023-03-30 22:18:03,604 INFO L226 Difference]: Without dead ends: 869 [2023-03-30 22:18:03,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=418, Invalid=1388, Unknown=0, NotChecked=0, Total=1806 [2023-03-30 22:18:03,607 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 252 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:03,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 100 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:18:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-03-30 22:18:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 813. [2023-03-30 22:18:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 679 states have (on average 1.175257731958763) internal successors, (798), 716 states have internal predecessors, (798), 95 states have call successors, (95), 39 states have call predecessors, (95), 38 states have return successors, (94), 57 states have call predecessors, (94), 94 states have call successors, (94) [2023-03-30 22:18:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 987 transitions. [2023-03-30 22:18:03,791 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 987 transitions. Word has length 74 [2023-03-30 22:18:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:03,791 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 987 transitions. [2023-03-30 22:18:03,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-03-30 22:18:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 987 transitions. [2023-03-30 22:18:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-30 22:18:03,795 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:03,795 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-03-30 22:18:03,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-30 22:18:04,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:04,001 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:04,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1178248331, now seen corresponding path program 1 times [2023-03-30 22:18:04,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:04,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048197996] [2023-03-30 22:18:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:04,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:18:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-03-30 22:18:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-03-30 22:18:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-30 22:18:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-03-30 22:18:04,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:04,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048197996] [2023-03-30 22:18:04,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048197996] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:18:04,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:18:04,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:18:04,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185837834] [2023-03-30 22:18:04,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:18:04,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:18:04,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:18:04,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:18:04,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:18:04,064 INFO L87 Difference]: Start difference. First operand 813 states and 987 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-03-30 22:18:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:18:04,274 INFO L93 Difference]: Finished difference Result 1042 states and 1263 transitions. [2023-03-30 22:18:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:18:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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 77 [2023-03-30 22:18:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:18:04,277 INFO L225 Difference]: With dead ends: 1042 [2023-03-30 22:18:04,278 INFO L226 Difference]: Without dead ends: 741 [2023-03-30 22:18:04,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:18:04,279 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:18:04,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:18:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2023-03-30 22:18:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 719. [2023-03-30 22:18:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 594 states have (on average 1.1565656565656566) internal successors, (687), 628 states have internal predecessors, (687), 86 states have call successors, (86), 39 states have call predecessors, (86), 38 states have return successors, (85), 51 states have call predecessors, (85), 85 states have call successors, (85) [2023-03-30 22:18:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 858 transitions. [2023-03-30 22:18:04,441 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 858 transitions. Word has length 77 [2023-03-30 22:18:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:18:04,441 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 858 transitions. [2023-03-30 22:18:04,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-03-30 22:18:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 858 transitions. [2023-03-30 22:18:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-30 22:18:04,444 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:18:04,444 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 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] [2023-03-30 22:18:04,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-03-30 22:18:04,444 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:18:04,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:18:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 948468617, now seen corresponding path program 6 times [2023-03-30 22:18:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:18:04,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462240466] [2023-03-30 22:18:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:18:04,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:18:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:18:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:18:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-30 22:18:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-03-30 22:18:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-03-30 22:18:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-03-30 22:18:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-30 22:18:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:18:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 74 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:18:04,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:18:04,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462240466] [2023-03-30 22:18:04,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462240466] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:18:04,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528410740] [2023-03-30 22:18:04,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:18:04,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:18:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:18:04,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:18:04,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 22:18:05,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-03-30 22:18:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:18:05,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2023-03-30 22:18:05,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:18:05,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:18:05,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-03-30 22:18:05,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-03-30 22:18:05,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-03-30 22:18:05,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28