/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/nr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:54:51,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:54:51,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:54:51,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:54:51,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:54:51,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:54:51,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:54:51,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:54:51,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:54:51,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:54:51,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:54:51,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:54:51,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:54:51,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:54:51,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:54:51,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:54:51,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:54:51,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:54:51,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:54:51,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:54:51,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:54:51,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:54:51,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:54:51,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:54:51,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:54:51,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:54:51,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:54:51,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:54:51,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:54:51,949 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:54:51,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:54:51,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:54:51,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:54:51,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:54:51,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:54:51,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:54:51,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:54:51,951 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:54:51,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:54:51,952 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:54:51,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:54:51,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:54:51,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:54:51,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:54:51,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:54:51,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:54:51,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:54:51,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:54:51,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:54:51,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:54:51,954 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:54:51,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:54:51,955 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:54:51,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:54:51,955 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:54:51,955 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:54:52,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:54:52,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:54:52,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:54:52,164 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:54:52,164 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:54:52,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr2.c [2023-04-01 18:54:53,098 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:54:53,282 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:54:53,282 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr2.c [2023-04-01 18:54:53,286 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16bed4861/4ea10d4ca9e24e8d8c6d474f9f339cbe/FLAG6e42557c0 [2023-04-01 18:54:53,706 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16bed4861/4ea10d4ca9e24e8d8c6d474f9f339cbe [2023-04-01 18:54:53,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:54:53,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:54:53,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:54:53,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:54:53,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:54:53,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655c8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53, skipping insertion in model container [2023-04-01 18:54:53,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:54:53,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:54:53,852 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/nr2.c[394,407] [2023-04-01 18:54:53,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:54:53,878 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:54:53,890 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/nr2.c[394,407] [2023-04-01 18:54:53,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:54:53,912 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:54:53,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53 WrapperNode [2023-04-01 18:54:53,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:54:53,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:54:53,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:54:53,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:54:53,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:54:53,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:54:53,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:54:53,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:54:53,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (1/1) ... [2023-04-01 18:54:53,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:54:53,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:53,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:54:53,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:54:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:54:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:54:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:54:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 18:54:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:54:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:54:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:54:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:54:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:54:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:54:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:54:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:54:54,053 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:54:54,055 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:54:54,177 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:54:54,181 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:54:54,181 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:54:54,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:54:54 BoogieIcfgContainer [2023-04-01 18:54:54,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:54:54,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:54:54,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:54:54,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:54:54,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:54:53" (1/3) ... [2023-04-01 18:54:54,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dfb108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:54:54, skipping insertion in model container [2023-04-01 18:54:54,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:53" (2/3) ... [2023-04-01 18:54:54,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dfb108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:54:54, skipping insertion in model container [2023-04-01 18:54:54,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:54:54" (3/3) ... [2023-04-01 18:54:54,188 INFO L112 eAbstractionObserver]: Analyzing ICFG nr2.c [2023-04-01 18:54:54,207 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:54:54,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:54:54,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:54:54,243 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;@717ede66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:54:54,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:54:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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) [2023-04-01 18:54:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:54:54,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:54,251 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] [2023-04-01 18:54:54,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:54,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 208371713, now seen corresponding path program 1 times [2023-04-01 18:54:54,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:54,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814231057] [2023-04-01 18:54:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:54,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:54,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:54,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:54:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814231057] [2023-04-01 18:54:54,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814231057] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:54:54,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:54:54,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:54:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986621958] [2023-04-01 18:54:54,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:54:54,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:54:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:54:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:54:54,523 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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) [2023-04-01 18:54:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:54,609 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2023-04-01 18:54:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:54:54,610 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 [2023-04-01 18:54:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:54,614 INFO L225 Difference]: With dead ends: 63 [2023-04-01 18:54:54,615 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:54:54,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:54:54,619 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:54,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:54:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:54:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 18:54:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-04-01 18:54:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-01 18:54:54,643 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2023-04-01 18:54:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:54,643 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-01 18:54:54,643 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) [2023-04-01 18:54:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-01 18:54:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:54:54,644 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:54,644 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] [2023-04-01 18:54:54,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:54:54,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:54,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash -963394890, now seen corresponding path program 1 times [2023-04-01 18:54:54,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:54,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302860208] [2023-04-01 18:54:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:54,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:54,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:54:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:54,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:54,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302860208] [2023-04-01 18:54:54,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302860208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:54:54,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:54:54,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:54:54,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986182494] [2023-04-01 18:54:54,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:54:54,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:54:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:54:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:54:54,819 INFO L87 Difference]: Start difference. First operand 31 states and 35 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) [2023-04-01 18:54:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:54,951 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-04-01 18:54:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:54:54,951 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 [2023-04-01 18:54:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:54,953 INFO L225 Difference]: With dead ends: 39 [2023-04-01 18:54:54,953 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 18:54:54,956 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 [2023-04-01 18:54:54,958 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:54,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:54:54,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 18:54:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-04-01 18:54:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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) [2023-04-01 18:54:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-04-01 18:54:54,971 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2023-04-01 18:54:54,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:54,971 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-04-01 18:54:54,972 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) [2023-04-01 18:54:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-04-01 18:54:54,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:54:54,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:54,972 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] [2023-04-01 18:54:54,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:54:54,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:54,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash -961547848, now seen corresponding path program 1 times [2023-04-01 18:54:54,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:54,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410869383] [2023-04-01 18:54:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:54,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:54:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:55,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:55,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410869383] [2023-04-01 18:54:55,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410869383] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:54:55,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:54:55,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:54:55,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89566053] [2023-04-01 18:54:55,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:54:55,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:54:55,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:55,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:54:55,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:54:55,168 INFO L87 Difference]: Start difference. First operand 36 states and 40 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) [2023-04-01 18:54:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:55,237 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-04-01 18:54:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:54:55,237 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 [2023-04-01 18:54:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:55,240 INFO L225 Difference]: With dead ends: 58 [2023-04-01 18:54:55,240 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 18:54:55,243 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 [2023-04-01 18:54:55,249 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:55,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:54:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 18:54:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-04-01 18:54:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 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) [2023-04-01 18:54:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-04-01 18:54:55,257 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 22 [2023-04-01 18:54:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:55,257 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-04-01 18:54:55,257 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) [2023-04-01 18:54:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-04-01 18:54:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 18:54:55,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:55,259 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] [2023-04-01 18:54:55,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 18:54:55,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:55,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1506939926, now seen corresponding path program 1 times [2023-04-01 18:54:55,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:55,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982257997] [2023-04-01 18:54:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:55,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:54:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:55,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:55,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982257997] [2023-04-01 18:54:55,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982257997] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:54:55,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:54:55,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:54:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168464859] [2023-04-01 18:54:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:54:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:54:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:54:55,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:54:55,328 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:54:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:55,370 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-04-01 18:54:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:54:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 25 [2023-04-01 18:54:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:55,371 INFO L225 Difference]: With dead ends: 62 [2023-04-01 18:54:55,371 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 18:54:55,371 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 [2023-04-01 18:54:55,372 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:55,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:54:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 18:54:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-04-01 18:54:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 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) [2023-04-01 18:54:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-04-01 18:54:55,378 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2023-04-01 18:54:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:55,378 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-04-01 18:54:55,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:54:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-04-01 18:54:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 18:54:55,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:55,379 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] [2023-04-01 18:54:55,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:54:55,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:55,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1007761327, now seen corresponding path program 1 times [2023-04-01 18:54:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:55,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177952480] [2023-04-01 18:54:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:55,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:54:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:55,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:55,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177952480] [2023-04-01 18:54:55,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177952480] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:55,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805756331] [2023-04-01 18:54:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:55,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:55,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:55,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:55,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:54:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:54:55,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:55,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:55,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805756331] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:55,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:55,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-04-01 18:54:55,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898390774] [2023-04-01 18:54:55,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:55,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:54:55,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:54:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:54:55,526 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:54:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:55,579 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-04-01 18:54:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:54:55,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-04-01 18:54:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:55,580 INFO L225 Difference]: With dead ends: 64 [2023-04-01 18:54:55,580 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 18:54:55,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:54:55,581 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:55,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 75 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:54:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 18:54:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-01 18:54:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 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) [2023-04-01 18:54:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-04-01 18:54:55,587 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2023-04-01 18:54:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:55,587 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-04-01 18:54:55,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:54:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-04-01 18:54:55,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 18:54:55,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:55,588 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] [2023-04-01 18:54:55,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:55,793 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 [2023-04-01 18:54:55,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:55,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash 641754678, now seen corresponding path program 2 times [2023-04-01 18:54:55,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:55,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413511416] [2023-04-01 18:54:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:55,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:54:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:55,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:55,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413511416] [2023-04-01 18:54:55,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413511416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:55,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059369347] [2023-04-01 18:54:55,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:54:55,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:55,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:55,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:54:55,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:54:55,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:55,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 18:54:55,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:56,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:54:56,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059369347] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:54:56,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:54:56,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-01 18:54:56,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141826640] [2023-04-01 18:54:56,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:54:56,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:54:56,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:54:56,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:54:56,019 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:54:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:56,042 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2023-04-01 18:54:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:54:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 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 31 [2023-04-01 18:54:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:56,045 INFO L225 Difference]: With dead ends: 67 [2023-04-01 18:54:56,045 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 18:54:56,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:54:56,047 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:56,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 48 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:54:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 18:54:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-01 18:54:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 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) [2023-04-01 18:54:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-04-01 18:54:56,055 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 31 [2023-04-01 18:54:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:56,055 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-04-01 18:54:56,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:54:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-04-01 18:54:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 18:54:56,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:56,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:56,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:56,263 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 [2023-04-01 18:54:56,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:56,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:56,264 INFO L85 PathProgramCache]: Analyzing trace with hash 899920116, now seen corresponding path program 1 times [2023-04-01 18:54:56,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:56,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463603026] [2023-04-01 18:54:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:56,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:56,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:54:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:56,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463603026] [2023-04-01 18:54:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463603026] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056069611] [2023-04-01 18:54:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:56,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:56,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:56,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:56,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:54:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:56,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 18:54:56,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:56,852 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 [2023-04-01 18:54:56,897 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 18:54:56,898 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 1 case distinctions, treesize of input 23 treesize of output 26 [2023-04-01 18:54:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:57,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:57,254 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 35 treesize of output 31 [2023-04-01 18:54:57,258 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 43 treesize of output 39 [2023-04-01 18:54:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:54:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056069611] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:57,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:57,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 14] total 38 [2023-04-01 18:54:57,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182741559] [2023-04-01 18:54:57,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:57,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 18:54:57,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:57,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 18:54:57,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 18:54:57,451 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:00,081 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] [2023-04-01 18:55:10,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:55:13,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:55:15,127 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] [2023-04-01 18:55:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:17,404 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2023-04-01 18:55:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 18:55:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2023-04-01 18:55:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:17,409 INFO L225 Difference]: With dead ends: 140 [2023-04-01 18:55:17,409 INFO L226 Difference]: Without dead ends: 114 [2023-04-01 18:55:17,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=785, Invalid=3902, Unknown=5, NotChecked=0, Total=4692 [2023-04-01 18:55:17,411 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 407 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 126 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:17,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 244 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 720 Invalid, 5 Unknown, 0 Unchecked, 8.9s Time] [2023-04-01 18:55:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-04-01 18:55:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 55. [2023-04-01 18:55:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 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) [2023-04-01 18:55:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-04-01 18:55:17,436 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 31 [2023-04-01 18:55:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:17,436 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-04-01 18:55:17,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-04-01 18:55:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 18:55:17,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:17,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:17,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 18:55:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:17,641 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:17,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash 426664587, now seen corresponding path program 1 times [2023-04-01 18:55:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:17,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769003988] [2023-04-01 18:55:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:17,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:17,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:17,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:17,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:55:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:17,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:17,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769003988] [2023-04-01 18:55:17,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769003988] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:17,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031552849] [2023-04-01 18:55:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:17,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:17,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:17,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:55:17,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:55:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:18,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 18:55:18,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:18,082 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 [2023-04-01 18:55:18,339 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:55:18,339 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 38 treesize of output 20 [2023-04-01 18:55:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:18,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:22,521 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 [2023-04-01 18:55:22,523 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 [2023-04-01 18:55:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:22,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031552849] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:22,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:22,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 37 [2023-04-01 18:55:22,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161941671] [2023-04-01 18:55:22,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:22,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 18:55:22,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 18:55:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1148, Unknown=2, NotChecked=0, Total=1332 [2023-04-01 18:55:22,611 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 37 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 18:55:25,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:55:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:25,408 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2023-04-01 18:55:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 18:55:25,408 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2023-04-01 18:55:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:25,409 INFO L225 Difference]: With dead ends: 110 [2023-04-01 18:55:25,409 INFO L226 Difference]: Without dead ends: 108 [2023-04-01 18:55:25,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=413, Invalid=2891, Unknown=2, NotChecked=0, Total=3306 [2023-04-01 18:55:25,410 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:25,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 188 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 676 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 18:55:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-01 18:55:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2023-04-01 18:55:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 81 states have internal predecessors, (92), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 18:55:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2023-04-01 18:55:25,424 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 40 [2023-04-01 18:55:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:25,424 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2023-04-01 18:55:25,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 18:55:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2023-04-01 18:55:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 18:55:25,425 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:25,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 18:55:25,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:55:25,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:25,629 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:25,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:25,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1217623340, now seen corresponding path program 2 times [2023-04-01 18:55:25,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:25,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763924842] [2023-04-01 18:55:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:25,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:25,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:25,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:25,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:55:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:25,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:55:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:55:25,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:25,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763924842] [2023-04-01 18:55:25,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763924842] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:25,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266273879] [2023-04-01 18:55:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:55:25,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:25,857 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:55:25,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:55:25,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:55:25,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:55:25,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 18:55:25,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:55:26,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:55:26,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266273879] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:26,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:26,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2023-04-01 18:55:26,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420676036] [2023-04-01 18:55:26,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 18:55:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 18:55:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2023-04-01 18:55:26,293 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:55:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:26,583 INFO L93 Difference]: Finished difference Result 156 states and 182 transitions. [2023-04-01 18:55:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 18:55:26,584 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2023-04-01 18:55:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:26,585 INFO L225 Difference]: With dead ends: 156 [2023-04-01 18:55:26,585 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 18:55:26,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 18:55:26,586 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:26,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 88 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:55:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 18:55:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2023-04-01 18:55:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 78 states have internal predecessors, (88), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 18:55:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2023-04-01 18:55:26,599 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 49 [2023-04-01 18:55:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:26,599 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2023-04-01 18:55:26,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:55:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2023-04-01 18:55:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 18:55:26,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:26,600 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:26,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:55:26,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:26,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:26,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:26,805 INFO L85 PathProgramCache]: Analyzing trace with hash 612321991, now seen corresponding path program 3 times [2023-04-01 18:55:26,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:26,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697025381] [2023-04-01 18:55:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:26,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:27,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:27,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:55:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:27,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:27,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697025381] [2023-04-01 18:55:27,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697025381] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:27,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212833383] [2023-04-01 18:55:27,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:55:27,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:27,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:27,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:55:27,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:55:27,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 18:55:27,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:55:27,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-01 18:55:27,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:27,469 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 [2023-04-01 18:55:27,533 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-04-01 18:55:27,534 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 1 case distinctions, treesize of input 25 treesize of output 32 [2023-04-01 18:55:27,704 INFO L321 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2023-04-01 18:55:27,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 66 [2023-04-01 18:55:32,872 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-04-01 18:55:32,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 109 [2023-04-01 18:55:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:55:33,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:33,511 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 79 treesize of output 75 [2023-04-01 18:55:33,515 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 1089 treesize of output 1057 [2023-04-01 18:55:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:55:33,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212833383] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:33,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:33,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 20] total 53 [2023-04-01 18:55:33,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558701573] [2023-04-01 18:55:33,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:33,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-01 18:55:33,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:33,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-01 18:55:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2427, Unknown=2, NotChecked=0, Total=2756 [2023-04-01 18:55:33,711 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 53 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:55:40,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:55:45,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:55:48,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:55:50,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:55:52,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:55:57,993 WARN L223 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 18:56:00,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:02,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:04,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:06,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:08,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:10,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:13,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:15,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:17,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:19,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:21,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:23,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:25,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:29,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:31,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:33,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:35,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:40,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:42,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:44,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:46,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:48,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:50,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 18:56:52,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:54,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:56,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:56:58,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:57:00,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:57:04,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 18:57:06,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:08,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:10,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:12,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:14,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:16,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:57:18,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:57:20,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 18:57:20,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:20,463 INFO L93 Difference]: Finished difference Result 276 states and 343 transitions. [2023-04-01 18:57:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-04-01 18:57:20,466 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 49 [2023-04-01 18:57:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:20,467 INFO L225 Difference]: With dead ends: 276 [2023-04-01 18:57:20,467 INFO L226 Difference]: Without dead ends: 207 [2023-04-01 18:57:20,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=1588, Invalid=11979, Unknown=5, NotChecked=0, Total=13572 [2023-04-01 18:57:20,470 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 405 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 187 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.7s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:20,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 372 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1626 Invalid, 42 Unknown, 0 Unchecked, 87.7s Time] [2023-04-01 18:57:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-04-01 18:57:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 123. [2023-04-01 18:57:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 101 states have (on average 1.198019801980198) internal successors, (121), 107 states have internal predecessors, (121), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 18:57:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2023-04-01 18:57:20,496 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 49 [2023-04-01 18:57:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:20,496 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2023-04-01 18:57:20,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:57:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2023-04-01 18:57:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 18:57:20,497 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:20,497 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2023-04-01 18:57:20,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 18:57:20,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:20,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:20,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:20,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1311590058, now seen corresponding path program 4 times [2023-04-01 18:57:20,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:20,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032561797] [2023-04-01 18:57:20,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:20,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:21,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:21,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:21,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:57:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:21,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:57:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:57:21,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:21,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032561797] [2023-04-01 18:57:21,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032561797] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:21,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932411552] [2023-04-01 18:57:21,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:57:21,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:21,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:21,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:57:21,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:57:21,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:57:21,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:21,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 18:57:21,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:21,167 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 13 treesize of output 9 [2023-04-01 18:57:21,225 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 18:57:21,226 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 1 case distinctions, treesize of input 26 treesize of output 25 [2023-04-01 18:57:29,436 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 7 [2023-04-01 18:57:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 18:57:29,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:57:38,067 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 31 treesize of output 29 [2023-04-01 18:57:38,070 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 78 treesize of output 74 [2023-04-01 18:57:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 18:57:38,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932411552] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:57:38,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:57:38,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 33 [2023-04-01 18:57:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361960876] [2023-04-01 18:57:38,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 18:57:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 18:57:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=900, Unknown=7, NotChecked=0, Total=1056 [2023-04-01 18:57:38,151 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 18:57:40,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:42,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:44,460 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|)) (.cse1 (+ 8 |c_main_~#volArray~0.offset|))) (and (= 2 (select .cse0 .cse1)) (= 2 c_main_~MINVAL~0) (not (= (* c_main_~i~0 2) (+ 2 c_main_~j~0))) (forall ((v_main_~j~0_37 Int)) (or (< c_main_~j~0 (+ v_main_~j~0_37 1)) (forall ((v_ArrVal_119 Int)) (< c_main_~MINVAL~0 (+ (select (store .cse0 (+ (* v_main_~j~0_37 (- 4)) (* c_main_~i~0 8) |c_main_~#volArray~0.offset|) v_ArrVal_119) .cse1) 1))))))) is different from false [2023-04-01 18:57:46,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:48,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:50,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:50,821 INFO L93 Difference]: Finished difference Result 196 states and 227 transitions. [2023-04-01 18:57:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 18:57:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 58 [2023-04-01 18:57:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:50,823 INFO L225 Difference]: With dead ends: 196 [2023-04-01 18:57:50,823 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 18:57:50,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=292, Invalid=1684, Unknown=8, NotChecked=86, Total=2070 [2023-04-01 18:57:50,824 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 43 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:50,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 182 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 729 Invalid, 5 Unknown, 61 Unchecked, 10.4s Time] [2023-04-01 18:57:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 18:57:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 160. [2023-04-01 18:57:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 128 states have (on average 1.1796875) internal successors, (151), 136 states have internal predecessors, (151), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (18), 10 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 18:57:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 188 transitions. [2023-04-01 18:57:50,850 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 188 transitions. Word has length 58 [2023-04-01 18:57:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:50,850 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 188 transitions. [2023-04-01 18:57:50,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 18:57:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 188 transitions. [2023-04-01 18:57:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 18:57:50,851 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:50,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2023-04-01 18:57:50,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:57:51,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:51,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:51,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1312446359, now seen corresponding path program 5 times [2023-04-01 18:57:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:51,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153653388] [2023-04-01 18:57:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:51,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:57:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:57:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 18:57:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 18:57:51,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:51,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153653388] [2023-04-01 18:57:51,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153653388] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:51,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011995435] [2023-04-01 18:57:51,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:57:51,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:51,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:51,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:57:51,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:57:51,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-04-01 18:57:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:51,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 18:57:51,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:51,650 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 15 treesize of output 11 [2023-04-01 18:57:51,927 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 18:57:51,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:57:51,930 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 [2023-04-01 18:57:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 18:57:51,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:57:52,094 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 [2023-04-01 18:57:52,096 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 [2023-04-01 18:57:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 18:57:52,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011995435] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:57:52,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:57:52,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 14] total 33 [2023-04-01 18:57:52,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325852004] [2023-04-01 18:57:52,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:52,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 18:57:52,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 18:57:52,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 18:57:52,184 INFO L87 Difference]: Start difference. First operand 160 states and 188 transitions. Second operand has 33 states, 32 states have (on average 2.96875) internal successors, (95), 30 states have internal predecessors, (95), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 18:57:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:53,022 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2023-04-01 18:57:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 18:57:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.96875) internal successors, (95), 30 states have internal predecessors, (95), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 67 [2023-04-01 18:57:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:53,023 INFO L225 Difference]: With dead ends: 236 [2023-04-01 18:57:53,023 INFO L226 Difference]: Without dead ends: 234 [2023-04-01 18:57:53,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=2080, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 18:57:53,025 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 89 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:53,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 414 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:57:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-01 18:57:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 193. [2023-04-01 18:57:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 149 states have (on average 1.167785234899329) internal successors, (174), 160 states have internal predecessors, (174), 26 states have call successors, (26), 18 states have call predecessors, (26), 17 states have return successors, (25), 14 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 18:57:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 225 transitions. [2023-04-01 18:57:53,069 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 225 transitions. Word has length 67 [2023-04-01 18:57:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:53,070 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 225 transitions. [2023-04-01 18:57:53,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.96875) internal successors, (95), 30 states have internal predecessors, (95), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 18:57:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 225 transitions. [2023-04-01 18:57:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 18:57:53,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:53,070 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:53,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 18:57:53,274 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,SelfDestructingSolverStorable11 [2023-04-01 18:57:53,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:53,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash -240322732, now seen corresponding path program 6 times [2023-04-01 18:57:53,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:53,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025025213] [2023-04-01 18:57:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:53,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:57:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 18:57:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 13 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:57:54,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:54,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025025213] [2023-04-01 18:57:54,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025025213] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:54,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530257658] [2023-04-01 18:57:54,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:57:54,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:54,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:57:54,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:57:54,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-04-01 18:57:54,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:54,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 18:57:54,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:54,263 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 [2023-04-01 18:57:54,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:57:54,350 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 23 treesize of output 22 [2023-04-01 18:57:54,461 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-04-01 18:57:54,461 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 1 case distinctions, treesize of input 25 treesize of output 32 [2023-04-01 18:57:54,561 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-04-01 18:57:54,562 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 1 case distinctions, treesize of input 33 treesize of output 40 [2023-04-01 18:57:54,941 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 [2023-04-01 18:57:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 79 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:57:54,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:03,737 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_main_~i~0 1)) (.cse3 (select |c_#memory_int| |c_main_~#volArray~0.base|)) (.cse5 (+ 8 |c_main_~#volArray~0.offset|)) (.cse1 (div c_~CELLCOUNT~0 2))) (let ((.cse0 (forall ((v_main_~i~0_71 Int) (main_~j~0 Int) (v_ArrVal_177 Int) (v_ArrVal_175 Int) (v_main_~j~0_53 Int)) (or (< (+ v_main_~j~0_53 1) main_~j~0) (< 1 v_main_~j~0_53) (< v_main_~i~0_71 .cse2) (< c_main_~MINVAL~0 (+ (select (let ((.cse6 (* v_main_~i~0_71 8))) (store (store .cse3 (+ (* main_~j~0 (- 4)) .cse6 |c_main_~#volArray~0.offset|) v_ArrVal_175) (+ (* v_main_~j~0_53 (- 4)) .cse6 |c_main_~#volArray~0.offset|) v_ArrVal_177)) .cse5) 1)) (< v_main_~i~0_71 .cse1))))) (and (or .cse0 (not (= (mod c_~CELLCOUNT~0 2) 0))) (or .cse0 (< c_~CELLCOUNT~0 0)) (forall ((v_main_~j~0_53 Int)) (or (< 1 v_main_~j~0_53) (forall ((main_~j~0 Int)) (or (forall ((v_main_~i~0_71 Int) (v_ArrVal_177 Int) (v_ArrVal_175 Int)) (or (< v_main_~i~0_71 (+ .cse1 1)) (< v_main_~i~0_71 .cse2) (< c_main_~MINVAL~0 (+ (select (let ((.cse4 (* v_main_~i~0_71 8))) (store (store .cse3 (+ (* main_~j~0 (- 4)) .cse4 |c_main_~#volArray~0.offset|) v_ArrVal_175) (+ (* v_main_~j~0_53 (- 4)) .cse4 |c_main_~#volArray~0.offset|) v_ArrVal_177)) .cse5) 1)))) (< (+ v_main_~j~0_53 1) main_~j~0)))))))) is different from false [2023-04-01 18:58:05,910 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_main_~i~0 1)) (.cse1 (select |c_#memory_int| |c_main_~#volArray~0.base|)) (.cse2 (+ (* (- 4) c_main_~j~0) (* c_main_~i~0 8) |c_main_~#volArray~0.offset|)) (.cse4 (+ 8 |c_main_~#volArray~0.offset|)) (.cse0 (div c_~CELLCOUNT~0 2))) (let ((.cse6 (forall ((v_main_~i~0_71 Int) (v_ArrVal_177 Int) (v_ArrVal_175 Int) (v_ArrVal_173 Int) (v_main_~j~0_53 Int) (v_subst_2 Int)) (or (< 1 v_main_~j~0_53) (< v_main_~i~0_71 .cse5) (< c_main_~MINVAL~0 (+ (select (let ((.cse7 (* v_main_~i~0_71 8))) (store (store (store .cse1 .cse2 v_ArrVal_173) (+ .cse7 |c_main_~#volArray~0.offset| (* (- 4) v_subst_2)) v_ArrVal_175) (+ (* v_main_~j~0_53 (- 4)) .cse7 |c_main_~#volArray~0.offset|) v_ArrVal_177)) .cse4) 1)) (< (+ v_main_~j~0_53 1) v_subst_2) (< v_main_~i~0_71 .cse0))))) (and (forall ((v_ArrVal_173 Int) (v_main_~j~0_53 Int)) (or (< 1 v_main_~j~0_53) (forall ((v_subst_1 Int)) (or (< (+ v_main_~j~0_53 1) v_subst_1) (forall ((v_main_~i~0_71 Int) (v_ArrVal_177 Int) (v_ArrVal_175 Int)) (or (< v_main_~i~0_71 (+ .cse0 1)) (< c_main_~MINVAL~0 (+ (select (let ((.cse3 (* v_main_~i~0_71 8))) (store (store (store .cse1 .cse2 v_ArrVal_173) (+ (* (- 4) v_subst_1) .cse3 |c_main_~#volArray~0.offset|) v_ArrVal_175) (+ (* v_main_~j~0_53 (- 4)) .cse3 |c_main_~#volArray~0.offset|) v_ArrVal_177)) .cse4) 1)) (< v_main_~i~0_71 .cse5))))))) (or .cse6 (< c_~CELLCOUNT~0 0)) (or .cse6 (not (= (mod c_~CELLCOUNT~0 2) 0)))))) is different from false [2023-04-01 18:59:16,137 WARN L223 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 18:59:16,173 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 237 treesize of output 231 [2023-04-01 18:59:16,182 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 13419 treesize of output 13275 [2023-04-01 18:59:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 27 not checked. [2023-04-01 18:59:18,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530257658] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:18,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:18,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 21] total 58 [2023-04-01 18:59:18,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122909520] [2023-04-01 18:59:18,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-04-01 18:59:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-04-01 18:59:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2656, Unknown=31, NotChecked=218, Total=3306 [2023-04-01 18:59:18,683 INFO L87 Difference]: Start difference. First operand 193 states and 225 transitions. Second operand has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 10 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) [2023-04-01 18:59:20,884 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] [2023-04-01 18:59:22,983 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]