/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/eca-rers2012/Problem19_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:53:53,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:53:53,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:53:53,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:53:53,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:53:53,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:53:53,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:53:53,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:53:53,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:53:53,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:53:53,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:53:53,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:53:53,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:53:53,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:53:53,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:53:53,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:53:53,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:53:53,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:53:53,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:53:53,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:53:53,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:53:53,998 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:53:53,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:53:53,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:53:53,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:53:53,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:53:54,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:53:54,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:53:54,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:53:54,000 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:53:54,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:53:54,001 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:53:54,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:53:54,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:53:54,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:53:54,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:53:54,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:53:54,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:53:54,002 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:53:54,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:53:54,002 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:53:54,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:53:54,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:53:54,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:53:54,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:53:54,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:53:54,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:53:54,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:53:54,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:53:54,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:53:54,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:53:54,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:53:54,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:53:54,004 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:53:54,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:53:54,004 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:53:54,004 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:53:54,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:53:54,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:53:54,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:53:54,250 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:53:54,250 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:53:54,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label21.c [2023-04-01 23:53:55,349 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:53:55,891 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:53:55,892 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label21.c [2023-04-01 23:53:55,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77353780e/650a6cae5e1d40079853401d7a59dbc3/FLAGb5a1a67d7 [2023-04-01 23:53:55,959 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77353780e/650a6cae5e1d40079853401d7a59dbc3 [2023-04-01 23:53:55,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:53:55,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:53:55,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:53:55,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:53:55,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:53:55,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:53:55" (1/1) ... [2023-04-01 23:53:55,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bb3df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:55, skipping insertion in model container [2023-04-01 23:53:55,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:53:55" (1/1) ... [2023-04-01 23:53:55,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:53:56,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:53:56,446 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/eca-rers2012/Problem19_label21.c[2361,2374] [2023-04-01 23:53:57,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:53:57,629 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:53:57,653 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/eca-rers2012/Problem19_label21.c[2361,2374] [2023-04-01 23:53:58,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:53:58,344 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:53:58,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58 WrapperNode [2023-04-01 23:53:58,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:53:58,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:53:58,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:53:58,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:53:58,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:53:58,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:53:58,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:53:58,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:53:58,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:53:58,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:53:58,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:53:58,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:53:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:53:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:53:58,973 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:53:58,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:53:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:53:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:53:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:53:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:53:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:53:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:53:58,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:53:58,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:53:58,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:53:58,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:53:58,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:53:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:53:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:53:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:53:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:53:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:53:59,068 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:53:59,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:54:06,530 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:54:06,550 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:54:06,551 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:54:06,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:54:06 BoogieIcfgContainer [2023-04-01 23:54:06,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:54:06,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:54:06,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:54:06,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:54:06,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:53:55" (1/3) ... [2023-04-01 23:54:06,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4872b57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:54:06, skipping insertion in model container [2023-04-01 23:54:06,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58" (2/3) ... [2023-04-01 23:54:06,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4872b57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:54:06, skipping insertion in model container [2023-04-01 23:54:06,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:54:06" (3/3) ... [2023-04-01 23:54:06,563 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label21.c [2023-04-01 23:54:06,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:54:06,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:54:06,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:54:06,658 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;@525eeeb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:54:06,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:54:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 23:54:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 23:54:06,674 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:06,674 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] [2023-04-01 23:54:06,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:06,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:06,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1753223800, now seen corresponding path program 1 times [2023-04-01 23:54:06,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:06,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466084588] [2023-04-01 23:54:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:06,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:54:07,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:07,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466084588] [2023-04-01 23:54:07,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466084588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:07,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:54:07,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:54:07,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809749035] [2023-04-01 23:54:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:07,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:54:07,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:54:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:54:07,147 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-04-01 23:54:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:54:21,279 INFO L93 Difference]: Finished difference Result 6483 states and 12306 transitions. [2023-04-01 23:54:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:54:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 21 [2023-04-01 23:54:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:54:21,334 INFO L225 Difference]: With dead ends: 6483 [2023-04-01 23:54:21,334 INFO L226 Difference]: Without dead ends: 4638 [2023-04-01 23:54:21,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:54:21,348 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 7941 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 9147 mSolverCounterSat, 3639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7941 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 12786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3639 IncrementalHoareTripleChecker+Valid, 9147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:54:21,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7941 Valid, 495 Invalid, 12786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3639 Valid, 9147 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2023-04-01 23:54:21,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4638 states. [2023-04-01 23:54:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4638 to 4629. [2023-04-01 23:54:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4571 states have (on average 1.6764384161015096) internal successors, (7663), 4574 states have internal predecessors, (7663), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-04-01 23:54:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7760 transitions. [2023-04-01 23:54:21,574 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7760 transitions. Word has length 21 [2023-04-01 23:54:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:21,575 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 7760 transitions. [2023-04-01 23:54:21,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-04-01 23:54:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7760 transitions. [2023-04-01 23:54:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 23:54:21,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:21,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:21,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:54:21,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:21,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1531091136, now seen corresponding path program 1 times [2023-04-01 23:54:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:21,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320025640] [2023-04-01 23:54:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:21,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:22,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:54:22,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:22,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320025640] [2023-04-01 23:54:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320025640] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:22,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:54:22,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:54:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119716426] [2023-04-01 23:54:22,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:22,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:54:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:54:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:54:22,295 INFO L87 Difference]: Start difference. First operand 4629 states and 7760 transitions. Second operand has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:54:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:54:33,519 INFO L93 Difference]: Finished difference Result 13839 states and 23542 transitions. [2023-04-01 23:54:33,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:54:33,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2023-04-01 23:54:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:54:33,573 INFO L225 Difference]: With dead ends: 13839 [2023-04-01 23:54:33,574 INFO L226 Difference]: Without dead ends: 9216 [2023-04-01 23:54:33,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:54:33,587 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 8095 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 10002 mSolverCounterSat, 2125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8095 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 12127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2125 IncrementalHoareTripleChecker+Valid, 10002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:54:33,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8095 Valid, 897 Invalid, 12127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2125 Valid, 10002 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-04-01 23:54:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2023-04-01 23:54:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9059. [2023-04-01 23:54:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9059 states, 8892 states have (on average 1.4508547008547008) internal successors, (12901), 8909 states have internal predecessors, (12901), 38 states have call successors, (38), 38 states have call predecessors, (38), 128 states have return successors, (405), 111 states have call predecessors, (405), 37 states have call successors, (405) [2023-04-01 23:54:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9059 states to 9059 states and 13344 transitions. [2023-04-01 23:54:33,954 INFO L78 Accepts]: Start accepts. Automaton has 9059 states and 13344 transitions. Word has length 110 [2023-04-01 23:54:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:33,955 INFO L495 AbstractCegarLoop]: Abstraction has 9059 states and 13344 transitions. [2023-04-01 23:54:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:54:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 9059 states and 13344 transitions. [2023-04-01 23:54:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 23:54:33,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:33,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:33,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:54:33,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:33,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:33,969 INFO L85 PathProgramCache]: Analyzing trace with hash 428975827, now seen corresponding path program 1 times [2023-04-01 23:54:33,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:33,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167803528] [2023-04-01 23:54:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:33,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:34,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:54:34,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:34,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167803528] [2023-04-01 23:54:34,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167803528] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:34,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:54:34,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:54:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092209870] [2023-04-01 23:54:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:34,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:54:34,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:34,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:54:34,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:54:34,470 INFO L87 Difference]: Start difference. First operand 9059 states and 13344 transitions. Second operand has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 4 states have internal predecessors, (149), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:54:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:54:45,605 INFO L93 Difference]: Finished difference Result 27892 states and 42478 transitions. [2023-04-01 23:54:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:54:45,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 4 states have internal predecessors, (149), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 155 [2023-04-01 23:54:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:54:45,690 INFO L225 Difference]: With dead ends: 27892 [2023-04-01 23:54:45,690 INFO L226 Difference]: Without dead ends: 18839 [2023-04-01 23:54:45,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:54:45,720 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 8876 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 10686 mSolverCounterSat, 2137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8876 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 12823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2137 IncrementalHoareTripleChecker+Valid, 10686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:54:45,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8876 Valid, 1115 Invalid, 12823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2137 Valid, 10686 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2023-04-01 23:54:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18839 states. [2023-04-01 23:54:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18839 to 18417. [2023-04-01 23:54:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18417 states, 17885 states have (on average 1.2923679060665363) internal successors, (23114), 17964 states have internal predecessors, (23114), 74 states have call successors, (74), 74 states have call predecessors, (74), 457 states have return successors, (1799), 378 states have call predecessors, (1799), 73 states have call successors, (1799) [2023-04-01 23:54:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18417 states to 18417 states and 24987 transitions. [2023-04-01 23:54:46,233 INFO L78 Accepts]: Start accepts. Automaton has 18417 states and 24987 transitions. Word has length 155 [2023-04-01 23:54:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:46,234 INFO L495 AbstractCegarLoop]: Abstraction has 18417 states and 24987 transitions. [2023-04-01 23:54:46,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 4 states have internal predecessors, (149), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:54:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 18417 states and 24987 transitions. [2023-04-01 23:54:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-04-01 23:54:46,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:46,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:46,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:54:46,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:46,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:46,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1946048924, now seen corresponding path program 1 times [2023-04-01 23:54:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:46,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909418350] [2023-04-01 23:54:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:46,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:46,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:46,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-04-01 23:54:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:54:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909418350] [2023-04-01 23:54:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909418350] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:54:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097083644] [2023-04-01 23:54:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:46,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:54:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:54:46,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:54:46,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:54:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:46,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:54:46,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:54:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 23:54:46,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:54:46,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097083644] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:46,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:54:46,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-04-01 23:54:46,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650960389] [2023-04-01 23:54:46,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:46,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:54:46,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:46,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:54:46,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:54:46,896 INFO L87 Difference]: Start difference. First operand 18417 states and 24987 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:54:55,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:54:55,439 INFO L93 Difference]: Finished difference Result 55851 states and 78312 transitions. [2023-04-01 23:54:55,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:54:55,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 174 [2023-04-01 23:54:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:54:55,573 INFO L225 Difference]: With dead ends: 55851 [2023-04-01 23:54:55,573 INFO L226 Difference]: Without dead ends: 37440 [2023-04-01 23:54:55,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:54:55,622 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 8211 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 8101 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8211 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 9109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 8101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:54:55,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8211 Valid, 941 Invalid, 9109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 8101 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 23:54:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37440 states. [2023-04-01 23:54:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37440 to 34032. [2023-04-01 23:54:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34032 states, 32827 states have (on average 1.2681024766198556) internal successors, (41628), 33036 states have internal predecessors, (41628), 134 states have call successors, (134), 134 states have call predecessors, (134), 1070 states have return successors, (4290), 861 states have call predecessors, (4290), 133 states have call successors, (4290) [2023-04-01 23:54:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34032 states to 34032 states and 46052 transitions. [2023-04-01 23:54:56,588 INFO L78 Accepts]: Start accepts. Automaton has 34032 states and 46052 transitions. Word has length 174 [2023-04-01 23:54:56,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:56,589 INFO L495 AbstractCegarLoop]: Abstraction has 34032 states and 46052 transitions. [2023-04-01 23:54:56,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:54:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 34032 states and 46052 transitions. [2023-04-01 23:54:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-04-01 23:54:56,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:56,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:56,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:54:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:54:56,802 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:56,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1436225538, now seen corresponding path program 1 times [2023-04-01 23:54:56,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:56,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825077989] [2023-04-01 23:54:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:56,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:56,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:57,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:57,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 23:54:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:54:57,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:57,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825077989] [2023-04-01 23:54:57,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825077989] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:54:57,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018680094] [2023-04-01 23:54:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:57,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:54:57,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:54:57,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:54:57,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:54:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:57,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:54:57,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:54:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 23:54:57,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:54:57,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018680094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:57,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:54:57,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:54:57,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269332610] [2023-04-01 23:54:57,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:57,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:54:57,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:54:57,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:54:57,401 INFO L87 Difference]: Start difference. First operand 34032 states and 46052 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:06,822 INFO L93 Difference]: Finished difference Result 103217 states and 149793 transitions. [2023-04-01 23:55:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:55:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 190 [2023-04-01 23:55:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:07,250 INFO L225 Difference]: With dead ends: 103217 [2023-04-01 23:55:07,251 INFO L226 Difference]: Without dead ends: 69191 [2023-04-01 23:55:07,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:55:07,322 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 4826 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 8381 mSolverCounterSat, 3379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4826 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 11760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3379 IncrementalHoareTripleChecker+Valid, 8381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:07,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4826 Valid, 1202 Invalid, 11760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3379 Valid, 8381 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-04-01 23:55:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69191 states. [2023-04-01 23:55:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69191 to 64919. [2023-04-01 23:55:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64919 states, 62352 states have (on average 1.226279830638953) internal successors, (76461), 62843 states have internal predecessors, (76461), 254 states have call successors, (254), 254 states have call predecessors, (254), 2312 states have return successors, (12967), 1821 states have call predecessors, (12967), 253 states have call successors, (12967) [2023-04-01 23:55:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64919 states to 64919 states and 89682 transitions. [2023-04-01 23:55:08,961 INFO L78 Accepts]: Start accepts. Automaton has 64919 states and 89682 transitions. Word has length 190 [2023-04-01 23:55:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:55:08,961 INFO L495 AbstractCegarLoop]: Abstraction has 64919 states and 89682 transitions. [2023-04-01 23:55:08,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 64919 states and 89682 transitions. [2023-04-01 23:55:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-04-01 23:55:08,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:08,970 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:55:08,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 23:55:09,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:09,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:09,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash 145506461, now seen corresponding path program 1 times [2023-04-01 23:55:09,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:09,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791455629] [2023-04-01 23:55:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:09,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:09,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:55:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:09,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2023-04-01 23:55:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:09,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 329 [2023-04-01 23:55:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 141 proven. 97 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-04-01 23:55:09,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:09,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791455629] [2023-04-01 23:55:09,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791455629] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:55:09,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764830763] [2023-04-01 23:55:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:09,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:09,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:55:09,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:55:09,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:55:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:10,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:55:10,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:55:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 355 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 23:55:10,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:55:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 142 proven. 98 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-04-01 23:55:10,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764830763] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:55:10,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:55:10,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:55:10,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558356436] [2023-04-01 23:55:10,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:55:10,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:55:10,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:55:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:55:10,689 INFO L87 Difference]: Start difference. First operand 64919 states and 89682 transitions. Second operand has 12 states, 12 states have (on average 54.333333333333336) internal successors, (652), 10 states have internal predecessors, (652), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:55:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:55,272 INFO L93 Difference]: Finished difference Result 263897 states and 441379 transitions. [2023-04-01 23:55:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-04-01 23:55:55,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 54.333333333333336) internal successors, (652), 10 states have internal predecessors, (652), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 476 [2023-04-01 23:55:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:56,838 INFO L225 Difference]: With dead ends: 263897 [2023-04-01 23:55:56,838 INFO L226 Difference]: Without dead ends: 188743 [2023-04-01 23:55:57,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1012 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=814, Invalid=4298, Unknown=0, NotChecked=0, Total=5112 [2023-04-01 23:55:57,031 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 15420 mSDsluCounter, 3119 mSDsCounter, 0 mSdLazyCounter, 59314 mSolverCounterSat, 4649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15424 SdHoareTripleChecker+Valid, 3639 SdHoareTripleChecker+Invalid, 63963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4649 IncrementalHoareTripleChecker+Valid, 59314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:57,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15424 Valid, 3639 Invalid, 63963 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4649 Valid, 59314 Invalid, 0 Unknown, 0 Unchecked, 40.0s Time] [2023-04-01 23:55:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188743 states. [2023-04-01 23:56:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188743 to 181384. [2023-04-01 23:56:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181384 states, 174967 states have (on average 1.145398846639652) internal successors, (200407), 176221 states have internal predecessors, (200407), 834 states have call successors, (834), 722 states have call predecessors, (834), 5582 states have return successors, (58048), 4440 states have call predecessors, (58048), 833 states have call successors, (58048) [2023-04-01 23:56:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181384 states to 181384 states and 259289 transitions. [2023-04-01 23:56:02,729 INFO L78 Accepts]: Start accepts. Automaton has 181384 states and 259289 transitions. Word has length 476 [2023-04-01 23:56:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:56:02,729 INFO L495 AbstractCegarLoop]: Abstraction has 181384 states and 259289 transitions. [2023-04-01 23:56:02,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.333333333333336) internal successors, (652), 10 states have internal predecessors, (652), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:56:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand 181384 states and 259289 transitions. [2023-04-01 23:56:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2023-04-01 23:56:02,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:02,764 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:56:02,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 23:56:02,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:02,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:02,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1226043902, now seen corresponding path program 1 times [2023-04-01 23:56:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975745090] [2023-04-01 23:56:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:04,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:04,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:56:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:04,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-01 23:56:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:05,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:56:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:05,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 727 [2023-04-01 23:56:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:05,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 891 [2023-04-01 23:56:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 272 proven. 294 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2023-04-01 23:56:06,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:56:06,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975745090] [2023-04-01 23:56:06,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975745090] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:56:06,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196163870] [2023-04-01 23:56:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:06,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:06,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:56:06,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:56:06,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:56:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:06,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:56:06,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:56:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 831 proven. 2 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-04-01 23:56:07,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:56:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 273 proven. 296 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2023-04-01 23:56:08,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196163870] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:56:08,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:56:08,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:56:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559049140] [2023-04-01 23:56:08,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:56:08,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:56:08,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:56:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:56:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:56:08,685 INFO L87 Difference]: Start difference. First operand 181384 states and 259289 transitions. Second operand has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 9 states have internal predecessors, (1889), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 23:56:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:56:37,131 INFO L93 Difference]: Finished difference Result 437998 states and 641089 transitions. [2023-04-01 23:56:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 23:56:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 9 states have internal predecessors, (1889), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 1038 [2023-04-01 23:56:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:56:38,261 INFO L225 Difference]: With dead ends: 437998 [2023-04-01 23:56:38,261 INFO L226 Difference]: Without dead ends: 255239 [2023-04-01 23:56:38,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2176 GetRequests, 2122 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 23:56:38,486 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 14114 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 31192 mSolverCounterSat, 7297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14114 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 38489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7297 IncrementalHoareTripleChecker+Valid, 31192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:56:38,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14114 Valid, 1940 Invalid, 38489 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7297 Valid, 31192 Invalid, 0 Unknown, 0 Unchecked, 24.1s Time] [2023-04-01 23:56:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255239 states. [2023-04-01 23:56:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255239 to 243014. [2023-04-01 23:56:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243014 states, 234896 states have (on average 1.1033606361964443) internal successors, (259175), 236482 states have internal predecessors, (259175), 1107 states have call successors, (1107), 974 states have call predecessors, (1107), 7010 states have return successors, (64085), 5557 states have call predecessors, (64085), 1106 states have call successors, (64085) [2023-04-01 23:56:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243014 states to 243014 states and 324367 transitions. [2023-04-01 23:56:44,260 INFO L78 Accepts]: Start accepts. Automaton has 243014 states and 324367 transitions. Word has length 1038 [2023-04-01 23:56:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:56:44,261 INFO L495 AbstractCegarLoop]: Abstraction has 243014 states and 324367 transitions. [2023-04-01 23:56:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 9 states have internal predecessors, (1889), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 23:56:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 243014 states and 324367 transitions. [2023-04-01 23:56:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2023-04-01 23:56:44,296 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:44,297 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:56:44,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:56:44,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:44,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:44,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:44,503 INFO L85 PathProgramCache]: Analyzing trace with hash -759125022, now seen corresponding path program 1 times [2023-04-01 23:56:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965949325] [2023-04-01 23:56:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:44,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:45,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:45,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:56:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:46,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:56:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:46,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:56:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:56:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:46,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2023-04-01 23:56:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 411 proven. 11 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-04-01 23:56:46,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:56:46,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965949325] [2023-04-01 23:56:46,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965949325] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:56:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608812227] [2023-04-01 23:56:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:46,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:56:46,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:56:46,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:56:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:46,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:56:46,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:56:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 577 proven. 2 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 23:56:47,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:56:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 243 proven. 89 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2023-04-01 23:56:47,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608812227] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:56:47,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:56:47,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2023-04-01 23:56:47,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607163963] [2023-04-01 23:56:47,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:56:47,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 23:56:47,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:56:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 23:56:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-01 23:56:47,370 INFO L87 Difference]: Start difference. First operand 243014 states and 324367 transitions. Second operand has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 15 states have internal predecessors, (954), 6 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13)