/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/condn.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:30:59,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:30:59,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:30:59,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:30:59,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:30:59,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:30:59,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:30:59,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:30:59,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:30:59,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:30:59,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:30:59,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:30:59,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:30:59,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:30:59,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:30:59,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:30:59,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:30:59,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 22:30:59,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 22:30:59,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 22:30:59,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 22:30:59,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 22:30:59,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 22:30:59,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 22:30:59,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 22:30:59,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:30:59,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:30:59,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:30:59,903 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 22:30:59,933 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:30:59,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:30:59,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:30:59,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:30:59,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:30:59,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:30:59,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:30:59,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:30:59,936 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:30:59,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:30:59,937 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:30:59,938 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:30:59,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:30:59,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:30:59,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:30:59,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:30:59,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:30:59,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:30:59,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:30:59,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:30:59,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:30:59,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:30:59,940 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:30:59,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:30:59,941 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:30:59,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:30:59,941 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:30:59,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:31:00,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:31:00,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:31:00,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:31:00,178 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:31:00,178 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:31:00,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2023-03-30 22:31:01,353 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:31:01,506 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:31:01,507 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2023-03-30 22:31:01,511 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e9f0988/ef19256a330e432ebde8c5bb46895282/FLAG4e7ad655a [2023-03-30 22:31:01,524 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e9f0988/ef19256a330e432ebde8c5bb46895282 [2023-03-30 22:31:01,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:31:01,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:31:01,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:31:01,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:31:01,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:31:01,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7893a651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01, skipping insertion in model container [2023-03-30 22:31:01,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:31:01,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:31:01,658 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/condn.c[588,601] [2023-03-30 22:31:01,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:31:01,679 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:31:01,689 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/condn.c[588,601] [2023-03-30 22:31:01,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:31:01,703 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:31:01,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01 WrapperNode [2023-03-30 22:31:01,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:31:01,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:31:01,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:31:01,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:31:01,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:31:01,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:31:01,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:31:01,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:31:01,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (1/1) ... [2023-03-30 22:31:01,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:31:01,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:01,777 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 22:31:01,781 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 22:31:01,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:31:01,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:31:01,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:31:01,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:31:01,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:31:01,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:31:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:31:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:31:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:31:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:31:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:31:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:31:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:31:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-30 22:31:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:31:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-30 22:31:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:31:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:31:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:31:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:31:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:31:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:31:01,874 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:31:01,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:31:02,105 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:31:02,110 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:31:02,111 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:31:02,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:31:02 BoogieIcfgContainer [2023-03-30 22:31:02,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:31:02,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:31:02,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:31:02,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:31:02,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:31:01" (1/3) ... [2023-03-30 22:31:02,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338f6f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:31:02, skipping insertion in model container [2023-03-30 22:31:02,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:01" (2/3) ... [2023-03-30 22:31:02,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338f6f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:31:02, skipping insertion in model container [2023-03-30 22:31:02,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:31:02" (3/3) ... [2023-03-30 22:31:02,120 INFO L112 eAbstractionObserver]: Analyzing ICFG condn.c [2023-03-30 22:31:02,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:31:02,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:31:02,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:31:02,204 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;@4a991229, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:31:02,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:31:02,224 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 22:31:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:31:02,231 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:02,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:02,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:02,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash -9733170, now seen corresponding path program 1 times [2023-03-30 22:31:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:02,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466271254] [2023-03-30 22:31:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:02,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:02,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:02,442 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 22:31:02,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:02,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466271254] [2023-03-30 22:31:02,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466271254] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:31:02,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:31:02,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:31:02,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715013271] [2023-03-30 22:31:02,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:31:02,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:31:02,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:31:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:31:02,475 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:31:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:02,566 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2023-03-30 22:31:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:31:02,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-03-30 22:31:02,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:02,576 INFO L225 Difference]: With dead ends: 60 [2023-03-30 22:31:02,576 INFO L226 Difference]: Without dead ends: 30 [2023-03-30 22:31:02,578 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 22:31:02,581 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 22:31:02,582 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 22:31:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-30 22:31:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-03-30 22:31:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:31:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-03-30 22:31:02,640 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2023-03-30 22:31:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:02,641 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-03-30 22:31:02,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:31:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-03-30 22:31:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:31:02,644 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:02,644 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] [2023-03-30 22:31:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:31:02,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:02,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash -596539184, now seen corresponding path program 1 times [2023-03-30 22:31:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:02,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180522972] [2023-03-30 22:31:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:02,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:02,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:02,824 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 22:31:02,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:02,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180522972] [2023-03-30 22:31:02,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180522972] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:31:02,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:31:02,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:31:02,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482435580] [2023-03-30 22:31:02,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:31:02,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:31:02,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:31:02,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:31:02,828 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:31:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:02,929 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-03-30 22:31:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:31:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-03-30 22:31:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:02,934 INFO L225 Difference]: With dead ends: 54 [2023-03-30 22:31:02,934 INFO L226 Difference]: Without dead ends: 39 [2023-03-30 22:31:02,935 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 22:31:02,936 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:02,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 18 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:31:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-30 22:31:02,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-03-30 22:31:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 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), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:31:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-03-30 22:31:02,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2023-03-30 22:31:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:02,948 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-03-30 22:31:02,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:31:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-03-30 22:31:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-30 22:31:02,949 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:02,949 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] [2023-03-30 22:31:02,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:31:02,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:02,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2074913930, now seen corresponding path program 1 times [2023-03-30 22:31:02,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:02,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268822065] [2023-03-30 22:31:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:02,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:03,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:03,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:31:03,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268822065] [2023-03-30 22:31:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268822065] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:03,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745874293] [2023-03-30 22:31:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:03,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:03,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:03,463 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 22:31:03,488 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 22:31:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:03,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-30 22:31:03,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:03,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-03-30 22:31:03,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-03-30 22:31:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:31:03,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:03,879 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 36 treesize of output 30 [2023-03-30 22:31:03,890 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:31:03,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 43 treesize of output 23 [2023-03-30 22:31:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:31:03,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745874293] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:03,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:03,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 19 [2023-03-30 22:31:03,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466950715] [2023-03-30 22:31:03,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:03,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-30 22:31:03,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:03,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-30 22:31:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:31:03,933 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 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) [2023-03-30 22:31:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:04,324 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2023-03-30 22:31:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-30 22:31:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 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) Word has length 27 [2023-03-30 22:31:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:04,326 INFO L225 Difference]: With dead ends: 59 [2023-03-30 22:31:04,326 INFO L226 Difference]: Without dead ends: 57 [2023-03-30 22:31:04,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2023-03-30 22:31:04,328 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:04,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 123 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:31:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-30 22:31:04,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2023-03-30 22:31:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 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) [2023-03-30 22:31:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-03-30 22:31:04,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 27 [2023-03-30 22:31:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:04,338 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-03-30 22:31:04,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 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) [2023-03-30 22:31:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-03-30 22:31:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-30 22:31:04,339 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:04,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:04,351 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 22:31:04,545 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 22:31:04,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:04,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 604058336, now seen corresponding path program 1 times [2023-03-30 22:31:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:04,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863069538] [2023-03-30 22:31:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:04,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:04,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:04,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:04,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-03-30 22:31:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:04,658 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 22:31:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:04,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863069538] [2023-03-30 22:31:04,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863069538] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:04,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331176691] [2023-03-30 22:31:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:04,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:04,661 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 22:31:04,663 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 22:31:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:04,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:31:04,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:04,785 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 22:31:04,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:04,846 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 22:31:04,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331176691] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:04,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:04,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:31:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239537153] [2023-03-30 22:31:04,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:04,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:31:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:31:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:31:04,849 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-30 22:31:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:05,014 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2023-03-30 22:31:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:31:05,014 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), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2023-03-30 22:31:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:05,015 INFO L225 Difference]: With dead ends: 88 [2023-03-30 22:31:05,015 INFO L226 Difference]: Without dead ends: 52 [2023-03-30 22:31:05,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 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 22:31:05,017 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:05,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 51 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:31:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-03-30 22:31:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2023-03-30 22:31:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:31:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-03-30 22:31:05,025 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 35 [2023-03-30 22:31:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:05,025 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-03-30 22:31:05,025 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), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-30 22:31:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-03-30 22:31:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-30 22:31:05,026 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:05,026 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:31:05,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:05,231 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 22:31:05,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:05,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2096791390, now seen corresponding path program 2 times [2023-03-30 22:31:05,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:05,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502848339] [2023-03-30 22:31:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:05,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:05,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:05,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:05,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-30 22:31:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:05,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:05,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502848339] [2023-03-30 22:31:05,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502848339] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067398081] [2023-03-30 22:31:05,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:31:05,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:05,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:05,935 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 22:31:05,936 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 22:31:05,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:31:05,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:06,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-30 22:31:06,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:06,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-03-30 22:31:06,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-03-30 22:31:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:31:06,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:06,663 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 43 treesize of output 37 [2023-03-30 22:31:06,668 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:31:06,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 44 treesize of output 28 [2023-03-30 22:31:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:31:06,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067398081] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:06,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:06,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 11] total 39 [2023-03-30 22:31:06,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396915665] [2023-03-30 22:31:06,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:06,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-03-30 22:31:06,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-03-30 22:31:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2023-03-30 22:31:06,737 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 7 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:31:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:07,836 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2023-03-30 22:31:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-03-30 22:31:07,837 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 7 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-03-30 22:31:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:07,838 INFO L225 Difference]: With dead ends: 91 [2023-03-30 22:31:07,838 INFO L226 Difference]: Without dead ends: 89 [2023-03-30 22:31:07,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=538, Invalid=3752, Unknown=0, NotChecked=0, Total=4290 [2023-03-30 22:31:07,841 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 182 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:07,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 139 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:31:07,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-03-30 22:31:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2023-03-30 22:31:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:31:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-03-30 22:31:07,854 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 40 [2023-03-30 22:31:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:07,854 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-03-30 22:31:07,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 7 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:31:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-03-30 22:31:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-30 22:31:07,855 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:07,855 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-03-30 22:31:07,871 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 22:31:08,071 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 22:31:08,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:08,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash -441422088, now seen corresponding path program 3 times [2023-03-30 22:31:08,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:08,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634115039] [2023-03-30 22:31:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:08,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:08,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:08,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-30 22:31:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-30 22:31:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-30 22:31:08,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:08,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634115039] [2023-03-30 22:31:08,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634115039] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:08,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454013748] [2023-03-30 22:31:08,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:31:08,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:08,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:08,201 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 22:31:08,228 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 22:31:08,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:31:08,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:08,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:31:08,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-30 22:31:08,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-30 22:31:08,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454013748] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:08,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:08,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-03-30 22:31:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69432271] [2023-03-30 22:31:08,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:08,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:31:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:31:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:31:08,451 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:31:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:08,649 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2023-03-30 22:31:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:31:08,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2023-03-30 22:31:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:08,650 INFO L225 Difference]: With dead ends: 120 [2023-03-30 22:31:08,651 INFO L226 Difference]: Without dead ends: 65 [2023-03-30 22:31:08,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:31:08,652 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:08,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 50 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:31:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-03-30 22:31:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2023-03-30 22:31:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:31:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2023-03-30 22:31:08,661 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 48 [2023-03-30 22:31:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:08,662 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2023-03-30 22:31:08,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:31:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2023-03-30 22:31:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-30 22:31:08,663 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:08,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:08,671 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 22:31:08,871 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 22:31:08,872 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:08,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:08,872 INFO L85 PathProgramCache]: Analyzing trace with hash 48421818, now seen corresponding path program 4 times [2023-03-30 22:31:08,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:08,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226037900] [2023-03-30 22:31:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:09,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:09,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:09,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-03-30 22:31:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:09,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-03-30 22:31:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:31:09,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:09,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226037900] [2023-03-30 22:31:09,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226037900] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:09,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959842761] [2023-03-30 22:31:09,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:31:09,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:09,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:09,510 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 22:31:09,531 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 22:31:09,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:31:09,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:09,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-30 22:31:09,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:09,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-03-30 22:31:09,881 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 21 treesize of output 9 [2023-03-30 22:31:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:31:09,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:12,099 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 38 treesize of output 32 [2023-03-30 22:31:12,104 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:31:12,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 45 treesize of output 23 [2023-03-30 22:31:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:31:12,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959842761] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:12,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 32 [2023-03-30 22:31:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699462291] [2023-03-30 22:31:12,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:12,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-03-30 22:31:12,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-03-30 22:31:12,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=869, Unknown=1, NotChecked=0, Total=992 [2023-03-30 22:31:12,122 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 32 states, 30 states have (on average 2.7) internal successors, (81), 29 states have internal predecessors, (81), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:31:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:15,428 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2023-03-30 22:31:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-03-30 22:31:15,428 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.7) internal successors, (81), 29 states have internal predecessors, (81), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 53 [2023-03-30 22:31:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:15,429 INFO L225 Difference]: With dead ends: 113 [2023-03-30 22:31:15,429 INFO L226 Difference]: Without dead ends: 111 [2023-03-30 22:31:15,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=265, Invalid=2085, Unknown=2, NotChecked=0, Total=2352 [2023-03-30 22:31:15,431 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:15,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 189 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:31:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-03-30 22:31:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 64. [2023-03-30 22:31:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:31:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-03-30 22:31:15,445 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 53 [2023-03-30 22:31:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:15,445 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-03-30 22:31:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.7) internal successors, (81), 29 states have internal predecessors, (81), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:31:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-03-30 22:31:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-03-30 22:31:15,446 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:15,447 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:15,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-30 22:31:15,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:15,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:15,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:15,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1919758864, now seen corresponding path program 5 times [2023-03-30 22:31:15,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:15,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656273660] [2023-03-30 22:31:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:15,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:15,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:15,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:15,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-03-30 22:31:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:15,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-03-30 22:31:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:15,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-03-30 22:31:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:31:15,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:15,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656273660] [2023-03-30 22:31:15,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656273660] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:15,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421615711] [2023-03-30 22:31:15,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:31:15,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:15,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:15,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:31:15,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-03-30 22:31:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:15,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-30 22:31:15,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:31:16,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:31:16,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421615711] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:16,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:16,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-03-30 22:31:16,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547296009] [2023-03-30 22:31:16,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:16,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 22:31:16,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 22:31:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-03-30 22:31:16,167 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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) [2023-03-30 22:31:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:16,411 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2023-03-30 22:31:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:31:16,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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 61 [2023-03-30 22:31:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:16,412 INFO L225 Difference]: With dead ends: 152 [2023-03-30 22:31:16,412 INFO L226 Difference]: Without dead ends: 78 [2023-03-30 22:31:16,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-03-30 22:31:16,414 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:16,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 65 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:31:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-03-30 22:31:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2023-03-30 22:31:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 56 states have internal predecessors, (62), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:31:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-03-30 22:31:16,425 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 61 [2023-03-30 22:31:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:16,425 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-03-30 22:31:16,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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) [2023-03-30 22:31:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-03-30 22:31:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-30 22:31:16,427 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:16,427 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:16,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:16,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:16,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash 549899978, now seen corresponding path program 6 times [2023-03-30 22:31:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943081578] [2023-03-30 22:31:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:17,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-30 22:31:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-03-30 22:31:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:17,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-03-30 22:31:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:31:17,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:17,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943081578] [2023-03-30 22:31:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943081578] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:17,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738665744] [2023-03-30 22:31:17,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:31:17,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:17,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:17,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:17,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:31:17,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-03-30 22:31:17,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:17,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-30 22:31:17,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:17,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-03-30 22:31:18,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-03-30 22:31:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-30 22:31:18,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:18,656 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 43 treesize of output 37 [2023-03-30 22:31:18,660 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:31:18,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 44 treesize of output 28 [2023-03-30 22:31:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-30 22:31:18,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738665744] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:18,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:18,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 15] total 46 [2023-03-30 22:31:18,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355261534] [2023-03-30 22:31:18,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:18,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-03-30 22:31:18,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-03-30 22:31:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1843, Unknown=0, NotChecked=0, Total=2070 [2023-03-30 22:31:18,773 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 46 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2023-03-30 22:31:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:22,165 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2023-03-30 22:31:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-03-30 22:31:22,165 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 66 [2023-03-30 22:31:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:22,166 INFO L225 Difference]: With dead ends: 135 [2023-03-30 22:31:22,166 INFO L226 Difference]: Without dead ends: 133 [2023-03-30 22:31:22,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=446, Invalid=3976, Unknown=0, NotChecked=0, Total=4422 [2023-03-30 22:31:22,168 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 194 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 100 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:22,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 229 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1275 Invalid, 3 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 22:31:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-03-30 22:31:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2023-03-30 22:31:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-30 22:31:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2023-03-30 22:31:22,181 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 66 [2023-03-30 22:31:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:22,181 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2023-03-30 22:31:22,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2023-03-30 22:31:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2023-03-30 22:31:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-03-30 22:31:22,182 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:22,182 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:22,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-30 22:31:22,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:22,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:22,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 922031392, now seen corresponding path program 7 times [2023-03-30 22:31:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:22,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282612777] [2023-03-30 22:31:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:22,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:22,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-30 22:31:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:22,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-03-30 22:31:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:22,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-03-30 22:31:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:22,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-03-30 22:31:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-30 22:31:22,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:22,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282612777] [2023-03-30 22:31:22,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282612777] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:22,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608091584] [2023-03-30 22:31:22,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:31:22,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:22,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:22,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:22,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:31:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:22,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:31:22,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-30 22:31:22,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-30 22:31:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608091584] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:22,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:22,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2023-03-30 22:31:22,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588679178] [2023-03-30 22:31:22,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-30 22:31:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:22,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-30 22:31:22,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-03-30 22:31:22,942 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 11 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-03-30 22:31:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:23,212 INFO L93 Difference]: Finished difference Result 184 states and 202 transitions. [2023-03-30 22:31:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 22:31:23,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 11 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 74 [2023-03-30 22:31:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:23,214 INFO L225 Difference]: With dead ends: 184 [2023-03-30 22:31:23,214 INFO L226 Difference]: Without dead ends: 91 [2023-03-30 22:31:23,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-03-30 22:31:23,215 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 128 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:23,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 74 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:31:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-03-30 22:31:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-03-30 22:31:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.121212121212121) internal successors, (74), 67 states have internal predecessors, (74), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-30 22:31:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2023-03-30 22:31:23,240 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 74 [2023-03-30 22:31:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:23,240 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2023-03-30 22:31:23,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 11 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-03-30 22:31:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2023-03-30 22:31:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-30 22:31:23,241 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:23,242 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:23,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:23,445 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,SelfDestructingSolverStorable9 [2023-03-30 22:31:23,445 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:23,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash -690767126, now seen corresponding path program 8 times [2023-03-30 22:31:23,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:23,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805769485] [2023-03-30 22:31:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:24,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:24,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:24,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:31:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:24,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-03-30 22:31:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:24,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-03-30 22:31:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:24,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-03-30 22:31:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 92 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:31:24,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:24,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805769485] [2023-03-30 22:31:24,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805769485] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:24,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835247692] [2023-03-30 22:31:24,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:31:24,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:24,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:24,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:24,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:31:24,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:31:24,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:24,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-30 22:31:24,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:24,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-03-30 22:31:25,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-03-30 22:31:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-30 22:31:25,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:25,959 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 43 treesize of output 37 [2023-03-30 22:31:25,967 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:31:25,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 44 treesize of output 28 [2023-03-30 22:31:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-03-30 22:31:26,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835247692] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:26,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:26,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 17] total 50 [2023-03-30 22:31:26,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141356064] [2023-03-30 22:31:26,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-30 22:31:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-30 22:31:26,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2023-03-30 22:31:26,019 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 50 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 16 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2023-03-30 22:31:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:29,244 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2023-03-30 22:31:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-30 22:31:29,245 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 16 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) Word has length 79 [2023-03-30 22:31:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:29,246 INFO L225 Difference]: With dead ends: 157 [2023-03-30 22:31:29,246 INFO L226 Difference]: Without dead ends: 155 [2023-03-30 22:31:29,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 142 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=441, Invalid=4815, Unknown=0, NotChecked=0, Total=5256 [2023-03-30 22:31:29,248 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 187 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 100 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:29,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 319 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2113 Invalid, 2 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 22:31:29,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-03-30 22:31:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2023-03-30 22:31:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 73 states have internal predecessors, (80), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:31:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2023-03-30 22:31:29,263 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 79 [2023-03-30 22:31:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:29,263 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2023-03-30 22:31:29,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 16 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2023-03-30 22:31:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2023-03-30 22:31:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-30 22:31:29,264 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:29,264 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:29,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:29,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:29,470 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:29,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:29,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1075584704, now seen corresponding path program 9 times [2023-03-30 22:31:29,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:29,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163807561] [2023-03-30 22:31:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:29,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:29,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:29,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:29,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:31:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:29,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-03-30 22:31:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:29,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-03-30 22:31:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:29,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-03-30 22:31:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:29,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-03-30 22:31:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-03-30 22:31:29,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163807561] [2023-03-30 22:31:29,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163807561] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195100400] [2023-03-30 22:31:29,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:31:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:29,693 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:29,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 22:31:29,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-30 22:31:29,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:29,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-30 22:31:29,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-03-30 22:31:30,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-03-30 22:31:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195100400] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:30,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:31:30,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2023-03-30 22:31:30,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949654962] [2023-03-30 22:31:30,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-30 22:31:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-30 22:31:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:31:30,217 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-03-30 22:31:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:30,556 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2023-03-30 22:31:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-30 22:31:30,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 87 [2023-03-30 22:31:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:30,557 INFO L225 Difference]: With dead ends: 216 [2023-03-30 22:31:30,557 INFO L226 Difference]: Without dead ends: 104 [2023-03-30 22:31:30,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2023-03-30 22:31:30,559 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 151 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:30,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 95 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:31:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-03-30 22:31:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2023-03-30 22:31:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 78 states have internal predecessors, (86), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:31:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-03-30 22:31:30,574 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 87 [2023-03-30 22:31:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:30,574 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-03-30 22:31:30,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-03-30 22:31:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-03-30 22:31:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-30 22:31:30,575 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:30,575 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:30,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:30,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 22:31:30,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:30,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1836999438, now seen corresponding path program 10 times [2023-03-30 22:31:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:30,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698438619] [2023-03-30 22:31:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:30,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:31,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:31:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:31,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:31:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:31,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-30 22:31:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:31,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-30 22:31:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-30 22:31:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:31,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-30 22:31:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:31,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-30 22:31:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 10 proven. 137 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:31:31,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698438619] [2023-03-30 22:31:31,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698438619] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:31:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42004921] [2023-03-30 22:31:31,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:31:31,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:31,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:31,719 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:31,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 22:31:31,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:31:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:31,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-30 22:31:31,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:31,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20