/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-fpi/s2lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:34:35,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:34:35,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:34:35,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:34:35,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:34:35,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:34:35,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:34:35,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:34:35,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:34:35,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:34:35,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:34:35,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:34:35,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:34:35,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:34:35,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:34:35,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:34:35,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:34:35,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:34:35,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:34:35,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:34:35,917 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:34:35,946 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:34:35,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:34:35,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:34:35,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:34:35,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:34:35,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:34:35,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:34:35,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:34:35,948 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:34:35,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:34:35,949 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:34:35,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:34:35,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:34:35,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:34:35,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:34:35,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:34:35,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:34:35,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:34:35,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:34:35,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:34:35,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:34:35,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:34:35,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:34:35,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:34:35,952 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:34:35,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:34:35,952 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:34:35,952 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:34:36,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:34:36,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:34:36,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:34:36,227 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:34:36,227 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:34:36,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2lif.c [2023-03-30 22:34:37,424 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:34:37,661 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:34:37,662 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2023-03-30 22:34:37,667 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d37f25ad/02a9fd6672584e8ea977ab7d822fa64e/FLAG915e7caf7 [2023-03-30 22:34:37,683 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d37f25ad/02a9fd6672584e8ea977ab7d822fa64e [2023-03-30 22:34:37,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:34:37,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:34:37,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:34:37,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:34:37,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:34:37,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f9643c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37, skipping insertion in model container [2023-03-30 22:34:37,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:34:37,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:34:37,866 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-fpi/s2lif.c[588,601] [2023-03-30 22:34:37,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:34:37,903 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:34:37,916 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-fpi/s2lif.c[588,601] [2023-03-30 22:34:37,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:34:37,941 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:34:37,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37 WrapperNode [2023-03-30 22:34:37,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:34:37,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:34:37,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:34:37,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:34:37,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:37,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:34:37,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:34:37,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:34:37,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:34:37,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (1/1) ... [2023-03-30 22:34:38,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:34:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:38,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:34:38,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:34:38,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:34:38,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:34:38,069 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:34:38,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:34:38,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:34:38,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:34:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:34:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:34:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:34:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:34:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:34:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:34:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:34:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-30 22:34:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:34:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:34:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-30 22:34:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:34:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:34:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:34:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:34:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:34:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:34:38,148 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:34:38,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:34:38,328 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:34:38,349 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:34:38,349 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:34:38,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:34:38 BoogieIcfgContainer [2023-03-30 22:34:38,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:34:38,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:34:38,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:34:38,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:34:38,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:34:37" (1/3) ... [2023-03-30 22:34:38,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5000d129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:34:38, skipping insertion in model container [2023-03-30 22:34:38,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:37" (2/3) ... [2023-03-30 22:34:38,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5000d129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:34:38, skipping insertion in model container [2023-03-30 22:34:38,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:34:38" (3/3) ... [2023-03-30 22:34:38,357 INFO L112 eAbstractionObserver]: Analyzing ICFG s2lif.c [2023-03-30 22:34:38,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:34:38,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:34:38,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:34:38,442 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;@a9111de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:34:38,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:34:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:34:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-30 22:34:38,460 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:38,461 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] [2023-03-30 22:34:38,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:38,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:38,466 INFO L85 PathProgramCache]: Analyzing trace with hash -378919619, now seen corresponding path program 1 times [2023-03-30 22:34:38,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:38,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728953346] [2023-03-30 22:34:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:38,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:38,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:38,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:38,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728953346] [2023-03-30 22:34:38,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728953346] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:34:38,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:34:38,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:34:38,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180495784] [2023-03-30 22:34:38,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:34:38,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:34:38,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:34:38,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:34:38,813 INFO L87 Difference]: Start difference. First operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:34:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:38,919 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2023-03-30 22:34:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:34:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 23 [2023-03-30 22:34:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:38,930 INFO L225 Difference]: With dead ends: 60 [2023-03-30 22:34:38,930 INFO L226 Difference]: Without dead ends: 28 [2023-03-30 22:34:38,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:34:38,938 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:38,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:34:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-30 22:34:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-30 22:34:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-03-30 22:34:38,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2023-03-30 22:34:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:38,979 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-03-30 22:34:38,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:34:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-03-30 22:34:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-30 22:34:38,982 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:38,982 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] [2023-03-30 22:34:38,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:34:38,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:38,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:38,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1390036869, now seen corresponding path program 1 times [2023-03-30 22:34:38,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:38,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813212617] [2023-03-30 22:34:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:38,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:39,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:39,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:39,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:39,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813212617] [2023-03-30 22:34:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813212617] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:34:39,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:34:39,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:34:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040550424] [2023-03-30 22:34:39,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:34:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:34:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:34:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:34:39,195 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:39,322 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2023-03-30 22:34:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:34:39,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-03-30 22:34:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:39,324 INFO L225 Difference]: With dead ends: 48 [2023-03-30 22:34:39,325 INFO L226 Difference]: Without dead ends: 35 [2023-03-30 22:34:39,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:34:39,334 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:39,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:34:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-30 22:34:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-03-30 22:34:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-03-30 22:34:39,344 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2023-03-30 22:34:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:39,344 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-03-30 22:34:39,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-03-30 22:34:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:34:39,345 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:39,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:39,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:34:39,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:39,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1506162525, now seen corresponding path program 1 times [2023-03-30 22:34:39,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:39,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754835003] [2023-03-30 22:34:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:40,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:40,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:40,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:40,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754835003] [2023-03-30 22:34:40,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754835003] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:40,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770648529] [2023-03-30 22:34:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:40,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:40,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:40,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:34:40,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:34:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:40,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 42 conjunts are in the unsatisfiable core [2023-03-30 22:34:40,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:40,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:34:40,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:40,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-30 22:34:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:40,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-03-30 22:34:41,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:41,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-03-30 22:34:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:41,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:34:41,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:34:41,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 25 [2023-03-30 22:34:41,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:34:41,626 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-03-30 22:34:41,632 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:34:41,636 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 20 treesize of output 12 [2023-03-30 22:34:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:41,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770648529] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:34:41,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:34:41,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 42 [2023-03-30 22:34:41,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973440872] [2023-03-30 22:34:41,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:34:41,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-03-30 22:34:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-03-30 22:34:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2023-03-30 22:34:41,802 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:34:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:43,039 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2023-03-30 22:34:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-30 22:34:43,040 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-03-30 22:34:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:43,042 INFO L225 Difference]: With dead ends: 63 [2023-03-30 22:34:43,042 INFO L226 Difference]: Without dead ends: 57 [2023-03-30 22:34:43,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=644, Invalid=3016, Unknown=0, NotChecked=0, Total=3660 [2023-03-30 22:34:43,046 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:43,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 101 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:34:43,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-30 22:34:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2023-03-30 22:34:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-03-30 22:34:43,062 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2023-03-30 22:34:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:43,062 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-03-30 22:34:43,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:34:43,062 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-03-30 22:34:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:34:43,063 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:43,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:43,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:34:43,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:43,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:43,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1247997087, now seen corresponding path program 1 times [2023-03-30 22:34:43,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:43,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064988046] [2023-03-30 22:34:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:43,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:43,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:43,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:43,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064988046] [2023-03-30 22:34:43,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064988046] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432626418] [2023-03-30 22:34:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:43,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:43,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:34:43,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:34:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:43,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-30 22:34:43,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:43,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:34:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:43,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:34:43,568 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 14 treesize of output 12 [2023-03-30 22:34:43,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-03-30 22:34:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:43,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432626418] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:34:43,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:34:43,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2023-03-30 22:34:43,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510994383] [2023-03-30 22:34:43,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:34:43,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 22:34:43,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 22:34:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:34:43,586 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 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) [2023-03-30 22:34:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:43,684 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-03-30 22:34:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 22:34:43,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 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 30 [2023-03-30 22:34:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:43,685 INFO L225 Difference]: With dead ends: 60 [2023-03-30 22:34:43,686 INFO L226 Difference]: Without dead ends: 47 [2023-03-30 22:34:43,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-03-30 22:34:43,687 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:43,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:34:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-30 22:34:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-03-30 22:34:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-03-30 22:34:43,696 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 30 [2023-03-30 22:34:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:43,697 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-03-30 22:34:43,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 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) [2023-03-30 22:34:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-03-30 22:34:43,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-30 22:34:43,698 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:43,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:43,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 22:34:43,903 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,SelfDestructingSolverStorable3 [2023-03-30 22:34:43,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:43,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -949492539, now seen corresponding path program 2 times [2023-03-30 22:34:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269469182] [2023-03-30 22:34:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:43,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:43,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269469182] [2023-03-30 22:34:43,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269469182] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080428658] [2023-03-30 22:34:43,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:34:43,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:44,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:34:44,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:34:44,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:34:44,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:34:44,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:34:44,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:44,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:34:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:44,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080428658] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:34:44,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:34:44,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:34:44,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406950707] [2023-03-30 22:34:44,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:34:44,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:34:44,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:34:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:34:44,165 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2023-03-30 22:34:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:44,327 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2023-03-30 22:34:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:34:44,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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 32 [2023-03-30 22:34:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:44,328 INFO L225 Difference]: With dead ends: 82 [2023-03-30 22:34:44,328 INFO L226 Difference]: Without dead ends: 54 [2023-03-30 22:34:44,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:34:44,330 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:44,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 40 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:34:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-30 22:34:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2023-03-30 22:34:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-03-30 22:34:44,339 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2023-03-30 22:34:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:44,339 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-03-30 22:34:44,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2023-03-30 22:34:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-03-30 22:34:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-30 22:34:44,340 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:44,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:44,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:34:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:44,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:44,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:44,547 INFO L85 PathProgramCache]: Analyzing trace with hash 148078625, now seen corresponding path program 3 times [2023-03-30 22:34:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:44,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329605135] [2023-03-30 22:34:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:44,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:44,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:44,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:44,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:44,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329605135] [2023-03-30 22:34:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329605135] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:44,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847782680] [2023-03-30 22:34:44,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:34:44,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:44,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:34:44,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:34:44,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:34:44,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:34:44,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:34:44,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:44,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:34:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:34:44,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847782680] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:34:44,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:34:44,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:34:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470660453] [2023-03-30 22:34:44,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:34:44,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:34:44,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:34:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:34:44,801 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 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) [2023-03-30 22:34:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:44,959 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-03-30 22:34:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:34:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 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 32 [2023-03-30 22:34:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:44,960 INFO L225 Difference]: With dead ends: 51 [2023-03-30 22:34:44,960 INFO L226 Difference]: Without dead ends: 41 [2023-03-30 22:34:44,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-03-30 22:34:44,961 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:44,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 55 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:34:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-03-30 22:34:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2023-03-30 22:34:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-03-30 22:34:44,969 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2023-03-30 22:34:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:44,969 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-03-30 22:34:44,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 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) [2023-03-30 22:34:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-03-30 22:34:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-30 22:34:44,970 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:44,971 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:34:44,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:34:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:45,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:45,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash 550649411, now seen corresponding path program 4 times [2023-03-30 22:34:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206007906] [2023-03-30 22:34:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:46,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:46,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:46,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:46,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206007906] [2023-03-30 22:34:46,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206007906] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:46,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239064672] [2023-03-30 22:34:46,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:34:46,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:46,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:46,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:34:46,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:34:46,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:34:46,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:34:46,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 56 conjunts are in the unsatisfiable core [2023-03-30 22:34:46,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:46,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:34:46,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:46,918 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 14 treesize of output 16 [2023-03-30 22:34:46,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:46,968 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 14 treesize of output 16 [2023-03-30 22:34:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:47,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-03-30 22:34:47,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:47,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-30 22:34:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:47,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-30 22:34:47,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:47,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-30 22:34:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:47,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:34:48,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:34:48,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 121 [2023-03-30 22:35:05,771 WARN L223 SmtUtils]: Spent 10.16s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-30 22:35:13,089 WARN L223 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-30 22:35:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:35:13,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239064672] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:35:13,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:35:13,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 56 [2023-03-30 22:35:13,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422477169] [2023-03-30 22:35:13,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:35:13,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-03-30 22:35:13,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:35:13,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-03-30 22:35:13,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2712, Unknown=3, NotChecked=0, Total=3080 [2023-03-30 22:35:13,199 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 56 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 53 states have internal predecessors, (76), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)