/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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:15:50,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:15:50,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:15:50,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:15:50,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:15:50,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:15:50,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:15:50,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:15:50,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:15:50,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:15:50,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:15:50,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:15:50,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:15:50,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:15:50,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:15:50,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:15:50,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:15:50,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:15:50,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:15:50,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:15:51,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:15:51,018 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:15:51,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:15:51,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:15:51,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:15:51,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:15:51,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:15:51,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:15:51,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:15:51,019 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:15:51,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:15:51,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:15:51,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:15:51,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:15:51,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:15:51,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:15:51,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:15:51,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:15:51,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:15:51,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:15:51,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:15:51,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:15:51,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:15:51,022 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:15:51,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:15:51,022 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:15:51,022 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:15:51,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:15:51,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:15:51,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:15:51,219 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:15:51,220 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:15:51,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-2.c [2023-03-31 00:15:52,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:15:52,349 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:15:52,350 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-2.c [2023-03-31 00:15:52,354 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c3ba05a/e170de5f653f4582becc93c321a5197b/FLAGbe086c7fa [2023-03-31 00:15:52,369 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c3ba05a/e170de5f653f4582becc93c321a5197b [2023-03-31 00:15:52,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:15:52,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:15:52,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:15:52,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:15:52,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:15:52,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6313ec63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52, skipping insertion in model container [2023-03-31 00:15:52,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:15:52,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:15:52,500 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/loops/eureka_01-2.c[323,336] [2023-03-31 00:15:52,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:15:52,528 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:15:52,535 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/loops/eureka_01-2.c[323,336] [2023-03-31 00:15:52,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:15:52,556 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:15:52,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52 WrapperNode [2023-03-31 00:15:52,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:15:52,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:15:52,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:15:52,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:15:52,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,581 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:15:52,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:15:52,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:15:52,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:15:52,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (1/1) ... [2023-03-31 00:15:52,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:15:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:52,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 00:15:52,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 00:15:52,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:15:52,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:15:52,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:15:52,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:15:52,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:15:52,639 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:15:52,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:15:52,639 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:15:52,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:15:52,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:15:52,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:15:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 00:15:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:15:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:15:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:15:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:15:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:15:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:15:52,716 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:15:52,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:15:52,940 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:15:52,946 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:15:52,946 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-31 00:15:52,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:15:52 BoogieIcfgContainer [2023-03-31 00:15:52,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:15:52,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:15:52,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:15:52,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:15:52,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:15:52" (1/3) ... [2023-03-31 00:15:52,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e76465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:15:52, skipping insertion in model container [2023-03-31 00:15:52,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:15:52" (2/3) ... [2023-03-31 00:15:52,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e76465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:15:52, skipping insertion in model container [2023-03-31 00:15:52,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:15:52" (3/3) ... [2023-03-31 00:15:52,953 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2023-03-31 00:15:52,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:15:52,964 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:15:53,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:15:53,015 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;@3c8b8e11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:15:53,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:15:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:15:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:15:53,024 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:53,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:53,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:53,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1209894008, now seen corresponding path program 1 times [2023-03-31 00:15:53,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:53,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661947842] [2023-03-31 00:15:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:53,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:53,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661947842] [2023-03-31 00:15:53,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661947842] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:53,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:15:53,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:15:53,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658927566] [2023-03-31 00:15:53,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:53,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:15:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:15:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:15:53,279 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:53,369 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-03-31 00:15:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:15:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 00:15:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:53,375 INFO L225 Difference]: With dead ends: 61 [2023-03-31 00:15:53,375 INFO L226 Difference]: Without dead ends: 30 [2023-03-31 00:15:53,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:15:53,381 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:53,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-31 00:15:53,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-03-31 00:15:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-03-31 00:15:53,404 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2023-03-31 00:15:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:53,405 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-03-31 00:15:53,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-03-31 00:15:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:15:53,406 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:53,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:53,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:15:53,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:53,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash -286620772, now seen corresponding path program 1 times [2023-03-31 00:15:53,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:53,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907778573] [2023-03-31 00:15:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:53,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:53,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:15:53,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:53,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907778573] [2023-03-31 00:15:53,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907778573] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:53,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:15:53,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:15:53,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48686696] [2023-03-31 00:15:53,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:53,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:15:53,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:15:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:15:53,545 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:53,606 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2023-03-31 00:15:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:15:53,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 00:15:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:53,607 INFO L225 Difference]: With dead ends: 54 [2023-03-31 00:15:53,607 INFO L226 Difference]: Without dead ends: 33 [2023-03-31 00:15:53,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:15:53,608 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:53,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:15:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-31 00:15:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-03-31 00:15:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-03-31 00:15:53,613 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2023-03-31 00:15:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:53,614 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-03-31 00:15:53,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-03-31 00:15:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 00:15:53,614 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:53,614 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] [2023-03-31 00:15:53,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:15:53,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:53,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash -344225220, now seen corresponding path program 1 times [2023-03-31 00:15:53,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:53,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096727157] [2023-03-31 00:15:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:53,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:15:53,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:53,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096727157] [2023-03-31 00:15:53,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096727157] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:53,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:15:53,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:15:53,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541093415] [2023-03-31 00:15:53,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:53,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:15:53,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:15:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:15:53,734 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:53,822 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-03-31 00:15:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:15:53,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-03-31 00:15:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:53,823 INFO L225 Difference]: With dead ends: 61 [2023-03-31 00:15:53,823 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 00:15:53,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:15:53,825 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 96 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:53,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 00:15:53,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2023-03-31 00:15:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-03-31 00:15:53,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2023-03-31 00:15:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:53,833 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-03-31 00:15:53,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-03-31 00:15:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 00:15:53,834 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:53,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:53,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 00:15:53,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:53,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash -522475142, now seen corresponding path program 1 times [2023-03-31 00:15:53,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:53,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901422325] [2023-03-31 00:15:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:53,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:53,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:15:53,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:53,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901422325] [2023-03-31 00:15:53,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901422325] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:53,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:15:53,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:15:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378884044] [2023-03-31 00:15:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:53,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:15:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:15:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:15:53,911 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:53,988 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-03-31 00:15:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:15:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-03-31 00:15:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:53,989 INFO L225 Difference]: With dead ends: 55 [2023-03-31 00:15:53,989 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 00:15:53,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:15:53,996 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:53,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:15:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 00:15:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-03-31 00:15:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-03-31 00:15:54,008 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2023-03-31 00:15:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:54,008 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-03-31 00:15:54,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-03-31 00:15:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:15:54,011 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:54,011 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] [2023-03-31 00:15:54,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 00:15:54,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:54,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1086024003, now seen corresponding path program 1 times [2023-03-31 00:15:54,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:54,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371937026] [2023-03-31 00:15:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:54,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:54,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:15:54,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:54,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371937026] [2023-03-31 00:15:54,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371937026] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:54,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:15:54,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:15:54,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739093679] [2023-03-31 00:15:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:54,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:15:54,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:15:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:15:54,124 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:54,210 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-03-31 00:15:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:15:54,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-03-31 00:15:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:54,211 INFO L225 Difference]: With dead ends: 58 [2023-03-31 00:15:54,212 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 00:15:54,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:15:54,218 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:54,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 12 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 00:15:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2023-03-31 00:15:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-03-31 00:15:54,229 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2023-03-31 00:15:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:54,229 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-03-31 00:15:54,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-03-31 00:15:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 00:15:54,229 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:54,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:54,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 00:15:54,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:54,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -669976079, now seen corresponding path program 1 times [2023-03-31 00:15:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:54,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665672948] [2023-03-31 00:15:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:54,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:54,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:15:54,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:54,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665672948] [2023-03-31 00:15:54,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665672948] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:54,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629156473] [2023-03-31 00:15:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:54,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:54,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:54,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:54,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:15:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:54,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 00:15:54,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:15:54,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:15:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629156473] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:54,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:54,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-03-31 00:15:54,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46381033] [2023-03-31 00:15:54,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:54,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:15:54,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:54,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:15:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:15:54,514 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:54,624 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2023-03-31 00:15:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:15:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-03-31 00:15:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:54,625 INFO L225 Difference]: With dead ends: 67 [2023-03-31 00:15:54,625 INFO L226 Difference]: Without dead ends: 43 [2023-03-31 00:15:54,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:15:54,626 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:54,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-03-31 00:15:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-03-31 00:15:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-03-31 00:15:54,631 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2023-03-31 00:15:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:54,631 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-03-31 00:15:54,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-03-31 00:15:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 00:15:54,632 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:54,632 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:54,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:54,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 00:15:54,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:54,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash 535991441, now seen corresponding path program 2 times [2023-03-31 00:15:54,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:54,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994640547] [2023-03-31 00:15:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:54,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:54,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 00:15:54,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:54,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994640547] [2023-03-31 00:15:54,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994640547] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:54,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024604413] [2023-03-31 00:15:54,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:15:54,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:54,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:54,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:54,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:15:54,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:15:54,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:54,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 00:15:54,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 00:15:55,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:15:55,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024604413] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:15:55,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:15:55,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-03-31 00:15:55,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788174894] [2023-03-31 00:15:55,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:15:55,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:15:55,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:15:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:15:55,025 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:55,056 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2023-03-31 00:15:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:15:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-03-31 00:15:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:55,056 INFO L225 Difference]: With dead ends: 86 [2023-03-31 00:15:55,056 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 00:15:55,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:15:55,057 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:55,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 51 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:15:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 00:15:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2023-03-31 00:15:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-03-31 00:15:55,062 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 38 [2023-03-31 00:15:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:55,063 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-03-31 00:15:55,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-03-31 00:15:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 00:15:55,063 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:55,063 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:55,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:55,268 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,SelfDestructingSolverStorable6 [2023-03-31 00:15:55,269 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:55,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:55,269 INFO L85 PathProgramCache]: Analyzing trace with hash 385921679, now seen corresponding path program 1 times [2023-03-31 00:15:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:55,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689036075] [2023-03-31 00:15:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:55,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:55,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:15:55,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689036075] [2023-03-31 00:15:55,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689036075] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317591442] [2023-03-31 00:15:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:55,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:55,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:55,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:55,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:15:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:55,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:15:55,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:15:55,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:15:55,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317591442] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:55,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:55,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-03-31 00:15:55,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310390762] [2023-03-31 00:15:55,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:55,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-31 00:15:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-31 00:15:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2023-03-31 00:15:55,633 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:55,786 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-03-31 00:15:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:15:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-03-31 00:15:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:55,790 INFO L225 Difference]: With dead ends: 72 [2023-03-31 00:15:55,790 INFO L226 Difference]: Without dead ends: 48 [2023-03-31 00:15:55,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2023-03-31 00:15:55,791 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:55,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 32 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-03-31 00:15:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-03-31 00:15:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-03-31 00:15:55,803 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 38 [2023-03-31 00:15:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:55,803 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-03-31 00:15:55,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-03-31 00:15:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 00:15:55,809 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:55,809 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:55,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:56,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:56,016 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:56,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1361731471, now seen corresponding path program 2 times [2023-03-31 00:15:56,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:56,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190850355] [2023-03-31 00:15:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:56,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 00:15:56,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:56,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190850355] [2023-03-31 00:15:56,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190850355] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:56,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918270105] [2023-03-31 00:15:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:15:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:56,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:56,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:15:56,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:15:56,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:56,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 00:15:56,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 00:15:56,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 00:15:56,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918270105] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:56,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:56,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-03-31 00:15:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432872311] [2023-03-31 00:15:56,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:56,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 00:15:56,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:56,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 00:15:56,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:15:56,249 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:56,544 INFO L93 Difference]: Finished difference Result 144 states and 187 transitions. [2023-03-31 00:15:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 00:15:56,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-03-31 00:15:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:56,545 INFO L225 Difference]: With dead ends: 144 [2023-03-31 00:15:56,546 INFO L226 Difference]: Without dead ends: 122 [2023-03-31 00:15:56,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:15:56,546 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 317 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:56,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 32 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-03-31 00:15:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 58. [2023-03-31 00:15:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-03-31 00:15:56,553 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 41 [2023-03-31 00:15:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:56,553 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-03-31 00:15:56,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-03-31 00:15:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-31 00:15:56,554 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:56,554 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:56,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:56,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:56,759 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:56,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:56,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1886267226, now seen corresponding path program 3 times [2023-03-31 00:15:56,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:56,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953921456] [2023-03-31 00:15:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:56,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:56,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-03-31 00:15:56,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:56,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953921456] [2023-03-31 00:15:56,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953921456] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:56,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457113053] [2023-03-31 00:15:56,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:15:56,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:56,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:56,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:56,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:15:56,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 00:15:56,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:56,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 00:15:56,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-03-31 00:15:57,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-03-31 00:15:57,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457113053] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:57,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:57,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-03-31 00:15:57,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828562860] [2023-03-31 00:15:57,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:57,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 00:15:57,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 00:15:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:15:57,064 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:57,388 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2023-03-31 00:15:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 00:15:57,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-03-31 00:15:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:57,389 INFO L225 Difference]: With dead ends: 154 [2023-03-31 00:15:57,389 INFO L226 Difference]: Without dead ends: 120 [2023-03-31 00:15:57,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2023-03-31 00:15:57,390 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 404 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:57,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 47 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:15:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-03-31 00:15:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2023-03-31 00:15:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 91 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-03-31 00:15:57,399 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 53 [2023-03-31 00:15:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:57,399 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-03-31 00:15:57,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-03-31 00:15:57,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 00:15:57,399 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:57,399 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:57,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 00:15:57,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 00:15:57,604 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:57,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:57,605 INFO L85 PathProgramCache]: Analyzing trace with hash 461332056, now seen corresponding path program 4 times [2023-03-31 00:15:57,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:57,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016989024] [2023-03-31 00:15:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:57,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:57,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 106 proven. 12 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-03-31 00:15:57,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:57,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016989024] [2023-03-31 00:15:57,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016989024] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:57,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650972939] [2023-03-31 00:15:57,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:15:57,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:57,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:57,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:57,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:15:57,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:15:57,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:15:57,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 00:15:57,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:15:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 26 proven. 114 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2023-03-31 00:15:57,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:15:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 26 proven. 114 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2023-03-31 00:15:58,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650972939] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:15:58,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:15:58,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 21 [2023-03-31 00:15:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626712113] [2023-03-31 00:15:58,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:15:58,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-31 00:15:58,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:15:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-31 00:15:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-03-31 00:15:58,108 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 20 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:15:58,357 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2023-03-31 00:15:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:15:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 20 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2023-03-31 00:15:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:15:58,358 INFO L225 Difference]: With dead ends: 180 [2023-03-31 00:15:58,358 INFO L226 Difference]: Without dead ends: 117 [2023-03-31 00:15:58,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2023-03-31 00:15:58,359 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:15:58,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 67 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:15:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-03-31 00:15:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2023-03-31 00:15:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.2427184466019416) internal successors, (128), 103 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:15:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2023-03-31 00:15:58,369 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 92 [2023-03-31 00:15:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:15:58,369 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2023-03-31 00:15:58,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 20 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:15:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2023-03-31 00:15:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-03-31 00:15:58,370 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:15:58,370 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:15:58,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:15:58,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:58,576 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:15:58,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:15:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -405995204, now seen corresponding path program 5 times [2023-03-31 00:15:58,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:15:58,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632271222] [2023-03-31 00:15:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:15:58,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:15:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:58,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:15:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:15:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 175 proven. 22 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2023-03-31 00:15:58,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:15:58,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632271222] [2023-03-31 00:15:58,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632271222] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:15:58,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194501102] [2023-03-31 00:15:58,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:15:58,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:15:58,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:15:58,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:15:58,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:16:37,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-03-31 00:16:37,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:16:37,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:16:37,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 294 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-03-31 00:16:37,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:16:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 237 proven. 79 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-03-31 00:16:38,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194501102] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:16:38,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:16:38,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-03-31 00:16:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814116987] [2023-03-31 00:16:38,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:16:38,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 00:16:38,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 00:16:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:16:38,037 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 20 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:38,240 INFO L93 Difference]: Finished difference Result 253 states and 342 transitions. [2023-03-31 00:16:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 00:16:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2023-03-31 00:16:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:38,241 INFO L225 Difference]: With dead ends: 253 [2023-03-31 00:16:38,241 INFO L226 Difference]: Without dead ends: 181 [2023-03-31 00:16:38,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2023-03-31 00:16:38,242 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 131 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:38,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 22 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:16:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-03-31 00:16:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-03-31 00:16:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.28) internal successors, (224), 175 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:16:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 229 transitions. [2023-03-31 00:16:38,257 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 229 transitions. Word has length 104 [2023-03-31 00:16:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:38,257 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 229 transitions. [2023-03-31 00:16:38,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 19 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 229 transitions. [2023-03-31 00:16:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-03-31 00:16:38,258 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:38,258 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:38,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-31 00:16:38,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:38,475 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:38,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1254494148, now seen corresponding path program 6 times [2023-03-31 00:16:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:38,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857567462] [2023-03-31 00:16:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:38,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2579 backedges. 967 proven. 145 refuted. 0 times theorem prover too weak. 1467 trivial. 0 not checked. [2023-03-31 00:16:38,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:38,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857567462] [2023-03-31 00:16:38,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857567462] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:16:38,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673520819] [2023-03-31 00:16:38,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-31 00:16:38,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:38,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:38,982 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:16:38,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:16:39,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-03-31 00:16:39,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:16:39,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:16:39,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2579 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2557 trivial. 0 not checked. [2023-03-31 00:16:39,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:16:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2579 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2557 trivial. 0 not checked. [2023-03-31 00:16:40,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673520819] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:16:40,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:16:40,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2023-03-31 00:16:40,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321088952] [2023-03-31 00:16:40,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:16:40,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-31 00:16:40,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-31 00:16:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-03-31 00:16:40,037 INFO L87 Difference]: Start difference. First operand 181 states and 229 transitions. Second operand has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 26 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:43,927 INFO L93 Difference]: Finished difference Result 678 states and 898 transitions. [2023-03-31 00:16:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-03-31 00:16:43,927 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 26 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2023-03-31 00:16:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:43,929 INFO L225 Difference]: With dead ends: 678 [2023-03-31 00:16:43,929 INFO L226 Difference]: Without dead ends: 552 [2023-03-31 00:16:43,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8984 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7391, Invalid=17731, Unknown=0, NotChecked=0, Total=25122 [2023-03-31 00:16:43,935 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2316 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2316 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:43,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2316 Valid, 47 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:16:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-03-31 00:16:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 211. [2023-03-31 00:16:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.2585365853658537) internal successors, (258), 205 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:16:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 263 transitions. [2023-03-31 00:16:43,957 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 263 transitions. Word has length 176 [2023-03-31 00:16:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:43,957 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 263 transitions. [2023-03-31 00:16:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 26 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 263 transitions. [2023-03-31 00:16:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-03-31 00:16:43,958 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:43,958 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 10, 10, 10, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:43,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 00:16:44,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 00:16:44,161 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:44,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:44,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1076955864, now seen corresponding path program 7 times [2023-03-31 00:16:44,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:44,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503804786] [2023-03-31 00:16:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:44,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3216 backedges. 1162 proven. 176 refuted. 0 times theorem prover too weak. 1878 trivial. 0 not checked. [2023-03-31 00:16:44,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:44,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503804786] [2023-03-31 00:16:44,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503804786] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:16:44,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560887751] [2023-03-31 00:16:44,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 00:16:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:44,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:16:44,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 00:16:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:44,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-31 00:16:44,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3216 backedges. 1162 proven. 176 refuted. 0 times theorem prover too weak. 1878 trivial. 0 not checked. [2023-03-31 00:16:45,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:16:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3216 backedges. 1162 proven. 176 refuted. 0 times theorem prover too weak. 1878 trivial. 0 not checked. [2023-03-31 00:16:45,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560887751] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:16:45,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:16:45,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2023-03-31 00:16:45,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599529085] [2023-03-31 00:16:45,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:16:45,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-03-31 00:16:45,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:45,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-03-31 00:16:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=793, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 00:16:45,284 INFO L87 Difference]: Start difference. First operand 211 states and 263 transitions. Second operand has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:45,767 INFO L93 Difference]: Finished difference Result 472 states and 634 transitions. [2023-03-31 00:16:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 00:16:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2023-03-31 00:16:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:45,774 INFO L225 Difference]: With dead ends: 472 [2023-03-31 00:16:45,774 INFO L226 Difference]: Without dead ends: 319 [2023-03-31 00:16:45,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 389 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1142, Invalid=2164, Unknown=0, NotChecked=0, Total=3306 [2023-03-31 00:16:45,776 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 215 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:45,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 32 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:16:45,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-03-31 00:16:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2023-03-31 00:16:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 313 states have (on average 1.2843450479233227) internal successors, (402), 313 states have internal predecessors, (402), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:16:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 407 transitions. [2023-03-31 00:16:45,832 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 407 transitions. Word has length 206 [2023-03-31 00:16:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:45,832 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 407 transitions. [2023-03-31 00:16:45,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 407 transitions. [2023-03-31 00:16:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-03-31 00:16:45,835 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:45,835 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 10, 10, 10, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:45,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 00:16:46,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-03-31 00:16:46,041 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:46,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:46,042 INFO L85 PathProgramCache]: Analyzing trace with hash -104957764, now seen corresponding path program 8 times [2023-03-31 00:16:46,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:46,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201042668] [2023-03-31 00:16:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:46,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2023-03-31 00:16:46,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:46,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201042668] [2023-03-31 00:16:46,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201042668] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:16:46,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372963661] [2023-03-31 00:16:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:16:46,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:46,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:46,534 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:16:46,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 00:16:46,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:16:46,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:16:46,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:16:46,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2023-03-31 00:16:47,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:16:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2023-03-31 00:16:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372963661] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:16:47,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:16:47,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-03-31 00:16:47,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703097212] [2023-03-31 00:16:47,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:16:47,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 00:16:47,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:16:47,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 00:16:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:16:47,869 INFO L87 Difference]: Start difference. First operand 319 states and 407 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:16:48,107 INFO L93 Difference]: Finished difference Result 442 states and 557 transitions. [2023-03-31 00:16:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:16:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2023-03-31 00:16:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:16:48,109 INFO L225 Difference]: With dead ends: 442 [2023-03-31 00:16:48,109 INFO L226 Difference]: Without dead ends: 399 [2023-03-31 00:16:48,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 619 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:16:48,110 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 245 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:16:48,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 32 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:16:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-03-31 00:16:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 382. [2023-03-31 00:16:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 376 states have (on average 1.2925531914893618) internal successors, (486), 376 states have internal predecessors, (486), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:16:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 491 transitions. [2023-03-31 00:16:48,152 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 491 transitions. Word has length 314 [2023-03-31 00:16:48,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:16:48,152 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 491 transitions. [2023-03-31 00:16:48,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:16:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 491 transitions. [2023-03-31 00:16:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-03-31 00:16:48,155 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:16:48,155 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 10, 10, 10, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:16:48,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 00:16:48,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-03-31 00:16:48,363 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:16:48,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:16:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1961917126, now seen corresponding path program 9 times [2023-03-31 00:16:48,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:16:48,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719972074] [2023-03-31 00:16:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:16:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:16:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:49,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:16:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:16:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15565 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2023-03-31 00:16:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:16:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719972074] [2023-03-31 00:16:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719972074] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:16:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514849981] [2023-03-31 00:16:49,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:16:49,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:16:49,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:16:49,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:16:49,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 00:16:49,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-03-31 00:16:49,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:16:49,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 52 conjunts are in the unsatisfiable core [2023-03-31 00:16:49,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:16:49,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-03-31 00:16:49,801 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-03-31 00:16:49,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2023-03-31 00:16:49,865 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-03-31 00:16:49,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2023-03-31 00:16:49,932 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-03-31 00:16:49,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2023-03-31 00:16:50,003 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-03-31 00:16:50,004 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 5 case distinctions, treesize of input 44 treesize of output 52 [2023-03-31 00:16:50,177 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-03-31 00:16:50,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 67 [2023-03-31 00:16:50,618 INFO L321 Elim1Store]: treesize reduction 69, result has 25.8 percent of original size [2023-03-31 00:16:50,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 71 treesize of output 81 [2023-03-31 00:16:50,751 INFO L321 Elim1Store]: treesize reduction 30, result has 47.4 percent of original size [2023-03-31 00:16:50,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 74 treesize of output 51 [2023-03-31 00:16:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15565 backedges. 524 proven. 4 refuted. 0 times theorem prover too weak. 15037 trivial. 0 not checked. [2023-03-31 00:16:50,786 INFO L327 TraceCheckSpWp]: Computing backward predicates...