/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/sina2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:04:14,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:04:14,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:04:14,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 20:04:14,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 20:04:14,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 20:04:14,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 20:04:14,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 20:04:14,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 20:04:14,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 20:04:14,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 20:04:14,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 20:04:14,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:04:14,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:04:14,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:04:14,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:04:14,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:04:14,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:04:14,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:04:14,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:04:14,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:04:14,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:04:14,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:04:14,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:04:14,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 20:04:14,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 20:04:14,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 20:04:14,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 20:04:14,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 20:04:14,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 20:04:14,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 20:04:14,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 20:04:14,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 20:04:14,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:04:14,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:04:14,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:04:14,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:04:14,360 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:04:14,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:04:14,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:04:14,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:04:14,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:04:14,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:04:14,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:04:14,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:04:14,363 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:04:14,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:04:14,364 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:04:14,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:04:14,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:04:14,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:04:14,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:04:14,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:04:14,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:04:14,364 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:04:14,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:04:14,365 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:04:14,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:04:14,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:04:14,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:04:14,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:04:14,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:04:14,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:04:14,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:04:14,366 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:04:14,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:04:14,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:04:14,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:04:14,569 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:04:14,569 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:04:14,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sina2.c [2023-04-01 20:04:15,622 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:04:15,776 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:04:15,776 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina2.c [2023-04-01 20:04:15,781 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbd70a490/143ecc9067204f1baa80eb19bea621d5/FLAG3da047b7c [2023-04-01 20:04:15,793 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbd70a490/143ecc9067204f1baa80eb19bea621d5 [2023-04-01 20:04:15,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:04:15,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:04:15,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:04:15,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:04:15,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:04:15,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2f9b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15, skipping insertion in model container [2023-04-01 20:04:15,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:04:15,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:04:15,903 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/sina2.c[588,601] [2023-04-01 20:04:15,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:04:15,923 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:04:15,931 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/sina2.c[588,601] [2023-04-01 20:04:15,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:04:15,946 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:04:15,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15 WrapperNode [2023-04-01 20:04:15,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:04:15,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:04:15,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:04:15,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:04:15,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:04:15,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:04:15,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:04:15,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:04:15,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (1/1) ... [2023-04-01 20:04:15,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:04:15,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:04:16,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:04:16,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:04:16,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:04:16,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:04:16,034 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:04:16,034 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 20:04:16,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 20:04:16,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:04:16,034 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:04:16,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:04:16,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:04:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:04:16,085 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:04:16,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:04:16,242 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:04:16,246 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:04:16,246 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 20:04:16,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:04:16 BoogieIcfgContainer [2023-04-01 20:04:16,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:04:16,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:04:16,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:04:16,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:04:16,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:04:15" (1/3) ... [2023-04-01 20:04:16,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1471fa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:04:16, skipping insertion in model container [2023-04-01 20:04:16,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:04:15" (2/3) ... [2023-04-01 20:04:16,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1471fa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:04:16, skipping insertion in model container [2023-04-01 20:04:16,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:04:16" (3/3) ... [2023-04-01 20:04:16,269 INFO L112 eAbstractionObserver]: Analyzing ICFG sina2.c [2023-04-01 20:04:16,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:04:16,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:04:16,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:04:16,342 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;@4b8fd650, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:04:16,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:04:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 20:04:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 20:04:16,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:16,351 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] [2023-04-01 20:04:16,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:16,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 730907677, now seen corresponding path program 1 times [2023-04-01 20:04:16,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:16,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981474770] [2023-04-01 20:04:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:04:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:16,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:04:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:16,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:16,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981474770] [2023-04-01 20:04:16,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981474770] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:04:16,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:04:16,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:04:16,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156788347] [2023-04-01 20:04:16,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:04:16,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:04:16,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:04:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:04:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 20:04:16,588 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 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 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:16,657 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-04-01 20:04:16,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:04:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 24 [2023-04-01 20:04:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:16,664 INFO L225 Difference]: With dead ends: 64 [2023-04-01 20:04:16,664 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 20:04:16,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 20:04:16,668 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:16,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 20:04:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 20:04:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 20:04:16,693 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) [2023-04-01 20:04:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-04-01 20:04:16,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2023-04-01 20:04:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:16,695 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-04-01 20:04:16,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-04-01 20:04:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 20:04:16,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:16,696 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] [2023-04-01 20:04:16,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:04:16,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:16,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash -548956001, now seen corresponding path program 1 times [2023-04-01 20:04:16,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:16,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639257126] [2023-04-01 20:04:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:16,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:04:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:16,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:04:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:16,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639257126] [2023-04-01 20:04:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639257126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:04:16,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:04:16,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:04:16,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957917854] [2023-04-01 20:04:16,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:04:16,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:04:16,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:04:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:04:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:04:16,900 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:04:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:17,038 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2023-04-01 20:04:17,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:04:17,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-01 20:04:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:17,040 INFO L225 Difference]: With dead ends: 59 [2023-04-01 20:04:17,041 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 20:04:17,041 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 [2023-04-01 20:04:17,042 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:17,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 19 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:04:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 20:04:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2023-04-01 20:04:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:04:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-04-01 20:04:17,052 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 24 [2023-04-01 20:04:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:17,052 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-04-01 20:04:17,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:04:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-04-01 20:04:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 20:04:17,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:17,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:04:17,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:04:17,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:17,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1885615975, now seen corresponding path program 1 times [2023-04-01 20:04:17,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:17,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830710856] [2023-04-01 20:04:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:17,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:17,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:04:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:04:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:18,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:18,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830710856] [2023-04-01 20:04:18,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830710856] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:04:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167860600] [2023-04-01 20:04:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:04:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:04:18,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:04:18,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:04:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:18,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-01 20:04:18,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:04:18,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:04:18,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:04:18,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 20:04:18,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 20:04:18,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-04-01 20:04:18,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-04-01 20:04:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:18,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:04:19,027 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 20:04:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:19,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167860600] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:04:19,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:04:19,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 39 [2023-04-01 20:04:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064438052] [2023-04-01 20:04:19,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:04:19,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 20:04:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:04:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 20:04:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 20:04:19,156 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 39 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:04:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:20,007 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2023-04-01 20:04:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 20:04:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-04-01 20:04:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:20,010 INFO L225 Difference]: With dead ends: 68 [2023-04-01 20:04:20,010 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 20:04:20,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 20:04:20,011 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:20,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 154 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 20:04:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 20:04:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2023-04-01 20:04:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 45 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 20:04:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-04-01 20:04:20,026 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 30 [2023-04-01 20:04:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:20,027 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-04-01 20:04:20,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:04:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-04-01 20:04:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 20:04:20,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:20,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:04:20,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:04:20,235 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 [2023-04-01 20:04:20,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:20,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash -112916073, now seen corresponding path program 2 times [2023-04-01 20:04:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:20,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262093205] [2023-04-01 20:04:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:20,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:20,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:04:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:20,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:04:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:04:20,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:20,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262093205] [2023-04-01 20:04:20,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262093205] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:04:20,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054460482] [2023-04-01 20:04:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:04:20,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:04:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:04:20,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:04:20,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:04:20,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:04:20,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:04:20,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:04:20,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:04:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:04:20,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:04:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:04:20,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054460482] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:04:20,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:04:20,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-04-01 20:04:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127994404] [2023-04-01 20:04:20,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:04:20,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:04:20,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:04:20,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:04:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:04:20,435 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:20,722 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2023-04-01 20:04:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 20:04:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-04-01 20:04:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:20,723 INFO L225 Difference]: With dead ends: 96 [2023-04-01 20:04:20,723 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 20:04:20,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2023-04-01 20:04:20,724 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:20,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 85 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:04:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 20:04:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2023-04-01 20:04:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:04:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-04-01 20:04:20,732 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 32 [2023-04-01 20:04:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:20,732 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-04-01 20:04:20,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-04-01 20:04:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 20:04:20,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:20,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:04:20,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:04:20,938 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 [2023-04-01 20:04:20,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:20,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1411230445, now seen corresponding path program 3 times [2023-04-01 20:04:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:20,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572630694] [2023-04-01 20:04:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:04:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:21,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:04:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:21,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:21,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572630694] [2023-04-01 20:04:21,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572630694] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:04:21,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524406429] [2023-04-01 20:04:21,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 20:04:21,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:04:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:04:21,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:04:21,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:04:21,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 20:04:21,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:04:21,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-01 20:04:21,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:04:22,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:04:22,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:04:22,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 20:04:22,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 20:04:22,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:04:22,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:04:22,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:04:22,606 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-04-01 20:04:22,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 48 [2023-04-01 20:04:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:22,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:04:24,032 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 20:04:24,035 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 20:04:24,038 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-01 20:04:24,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 1 [2023-04-01 20:04:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:24,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524406429] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:04:24,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:04:24,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 21] total 59 [2023-04-01 20:04:24,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244609916] [2023-04-01 20:04:24,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:04:24,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-04-01 20:04:24,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:04:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-04-01 20:04:24,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=3083, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 20:04:24,062 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 59 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 55 states have internal predecessors, (76), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:04:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:30,275 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2023-04-01 20:04:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-04-01 20:04:30,276 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 55 states have internal predecessors, (76), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-04-01 20:04:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:30,280 INFO L225 Difference]: With dead ends: 119 [2023-04-01 20:04:30,281 INFO L226 Difference]: Without dead ends: 102 [2023-04-01 20:04:30,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3045 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1071, Invalid=9435, Unknown=0, NotChecked=0, Total=10506 [2023-04-01 20:04:30,285 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:30,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 233 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 20:04:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-01 20:04:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2023-04-01 20:04:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 20:04:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2023-04-01 20:04:30,314 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 36 [2023-04-01 20:04:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:30,315 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2023-04-01 20:04:30,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 55 states have internal predecessors, (76), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:04:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2023-04-01 20:04:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 20:04:30,316 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:30,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:04:30,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:04:30,525 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 [2023-04-01 20:04:30,525 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:30,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash 578088913, now seen corresponding path program 4 times [2023-04-01 20:04:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:30,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491402175] [2023-04-01 20:04:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:30,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:30,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:04:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:30,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:04:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:04:30,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:30,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491402175] [2023-04-01 20:04:30,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491402175] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:04:30,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448954156] [2023-04-01 20:04:30,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 20:04:30,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:04:30,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:04:30,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:04:30,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:04:30,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 20:04:30,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:04:30,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:04:30,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:04:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:04:30,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:04:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:04:30,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448954156] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:04:30,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:04:30,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-04-01 20:04:30,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826384046] [2023-04-01 20:04:30,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:04:30,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:04:30,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:04:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:04:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:04:30,788 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:31,064 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2023-04-01 20:04:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:04:31,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-04-01 20:04:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:31,066 INFO L225 Difference]: With dead ends: 121 [2023-04-01 20:04:31,066 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 20:04:31,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-04-01 20:04:31,066 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:31,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:04:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 20:04:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2023-04-01 20:04:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 20:04:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-04-01 20:04:31,079 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 38 [2023-04-01 20:04:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:31,079 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-04-01 20:04:31,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-04-01 20:04:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 20:04:31,080 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:31,080 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:04:31,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:04:31,288 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 [2023-04-01 20:04:31,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:31,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash 105189903, now seen corresponding path program 5 times [2023-04-01 20:04:31,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:31,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478828718] [2023-04-01 20:04:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:31,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:31,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:04:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:31,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:04:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:04:31,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478828718] [2023-04-01 20:04:31,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478828718] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:04:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150190839] [2023-04-01 20:04:31,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 20:04:31,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:04:31,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:04:31,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:04:31,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:04:31,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-04-01 20:04:31,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:04:31,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 20:04:31,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:04:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:04:31,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:04:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:04:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150190839] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:04:31,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:04:31,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2023-04-01 20:04:31,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67417014] [2023-04-01 20:04:31,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:04:31,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 20:04:31,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:04:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 20:04:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-04-01 20:04:31,573 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:31,879 INFO L93 Difference]: Finished difference Result 172 states and 192 transitions. [2023-04-01 20:04:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 20:04:31,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-04-01 20:04:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:31,880 INFO L225 Difference]: With dead ends: 172 [2023-04-01 20:04:31,880 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 20:04:31,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2023-04-01 20:04:31,882 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 181 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:31,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 62 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:04:31,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 20:04:31,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2023-04-01 20:04:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 95 states have internal predecessors, (103), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 20:04:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2023-04-01 20:04:31,906 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 40 [2023-04-01 20:04:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:31,906 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2023-04-01 20:04:31,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2023-04-01 20:04:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 20:04:31,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:31,907 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:04:31,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 20:04:32,112 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 [2023-04-01 20:04:32,112 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:32,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash 320593421, now seen corresponding path program 6 times [2023-04-01 20:04:32,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:32,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727032366] [2023-04-01 20:04:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:32,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:33,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:04:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:33,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:04:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:04:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:04:33,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:33,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727032366] [2023-04-01 20:04:33,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727032366] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:04:33,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742072506] [2023-04-01 20:04:33,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 20:04:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:04:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:04:33,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:04:33,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:04:33,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-01 20:04:33,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:04:33,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-01 20:04:33,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:04:33,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:04:33,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:04:33,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 20:04:33,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 20:04:33,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 20:04:34,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 20:04:34,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 46 [2023-04-01 20:04:34,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 46 [2023-04-01 20:04:34,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 46 [2023-04-01 20:04:34,480 INFO L321 Elim1Store]: treesize reduction 36, result has 48.6 percent of original size [2023-04-01 20:04:34,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 67 [2023-04-01 20:04:35,149 INFO L321 Elim1Store]: treesize reduction 108, result has 74.6 percent of original size [2023-04-01 20:04:35,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 164 treesize of output 409