/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/Problem05_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:57:53,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:57:53,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:57:53,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:57:53,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:57:53,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:57:53,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:57:53,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:57:53,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:57:53,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:57:53,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:57:53,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:57:53,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:57:53,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:57:53,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:57:53,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:57:53,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 20:57:53,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:57:53,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:57:53,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:57:53,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:57:53,513 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:57:53,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:57:53,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:57:53,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:57:53,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:57:53,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:57:53,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:57:53,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:57:53,516 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:57:53,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:57:53,517 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:57:53,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:57:53,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:57:53,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:57:53,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:57:53,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:57:53,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:57:53,518 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:57:53,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:57:53,518 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:57:53,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:57:53,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:57:53,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:57:53,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:57:53,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:57:53,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:57:53,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:57:53,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:57:53,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:57:53,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:57:53,520 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:57:53,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:57:53,520 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:57:53,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:57:53,520 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:57:53,520 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:57:53,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:57:53,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:57:53,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:57:53,786 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:57:53,786 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:57:53,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem05_label33.c [2023-04-01 20:57:54,945 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:57:55,496 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:57:55,497 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem05_label33.c [2023-04-01 20:57:55,545 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c858309f/172e89602645403eaf2f5db4d19b7dac/FLAG9b4146d30 [2023-04-01 20:57:55,560 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c858309f/172e89602645403eaf2f5db4d19b7dac [2023-04-01 20:57:55,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:57:55,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:57:55,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:57:55,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:57:55,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:57:55,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:57:55" (1/1) ... [2023-04-01 20:57:55,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b583db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:55, skipping insertion in model container [2023-04-01 20:57:55,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:57:55" (1/1) ... [2023-04-01 20:57:55,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:57:55,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:57:57,157 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/Problem05_label33.c[375230,375243] [2023-04-01 20:57:57,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:57:57,189 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:57:57,931 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem05_label33.c[375230,375243] [2023-04-01 20:57:57,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:57:57,986 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:57:57,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57 WrapperNode [2023-04-01 20:57:57,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:57:57,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:57:57,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:57:57,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:57:57,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:57,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:58,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:58,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:58,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:58,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:58,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:58,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:58,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:57:58,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:57:58,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:57:58,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:57:58,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (1/1) ... [2023-04-01 20:57:58,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:57:58,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:57:58,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:57:58,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:57:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:57:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:57:58,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:57:58,592 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:57:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 20:57:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 20:57:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 20:57:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 20:57:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 20:57:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2023-04-01 20:57:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2023-04-01 20:57:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:57:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:57:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 20:57:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 20:57:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:57:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:57:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:57:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:57:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:57:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:57:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:57:58,729 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:57:58,732 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:58:05,095 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:58:05,121 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:58:05,122 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:58:05,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:58:05 BoogieIcfgContainer [2023-04-01 20:58:05,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:58:05,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:58:05,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:58:05,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:58:05,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:57:55" (1/3) ... [2023-04-01 20:58:05,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc50af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:58:05, skipping insertion in model container [2023-04-01 20:58:05,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:57:57" (2/3) ... [2023-04-01 20:58:05,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc50af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:58:05, skipping insertion in model container [2023-04-01 20:58:05,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:58:05" (3/3) ... [2023-04-01 20:58:05,136 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label33.c [2023-04-01 20:58:05,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:58:05,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:58:05,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:58:05,257 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;@1a4cea55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:58:05,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:58:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 2222 states, 2200 states have (on average 1.864090909090909) internal successors, (4101), 2201 states have internal predecessors, (4101), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 20:58:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1661 [2023-04-01 20:58:05,403 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:58:05,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:58:05,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:58:05,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:58:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 614610777, now seen corresponding path program 1 times [2023-04-01 20:58:05,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:58:05,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894749443] [2023-04-01 20:58:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:58:05,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:58:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:13,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:58:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:58:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:58:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894749443] [2023-04-01 20:58:13,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894749443] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:58:13,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:58:13,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:58:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370741456] [2023-04-01 20:58:13,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:58:13,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:58:13,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:58:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:58:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:58:13,998 INFO L87 Difference]: Start difference. First operand has 2222 states, 2200 states have (on average 1.864090909090909) internal successors, (4101), 2201 states have internal predecessors, (4101), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 4 states have (on average 412.25) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:58:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:58:28,798 INFO L93 Difference]: Finished difference Result 8111 states and 15415 transitions. [2023-04-01 20:58:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:58:28,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 412.25) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1660 [2023-04-01 20:58:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:58:28,856 INFO L225 Difference]: With dead ends: 8111 [2023-04-01 20:58:28,856 INFO L226 Difference]: Without dead ends: 5821 [2023-04-01 20:58:28,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 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 20:58:28,875 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 9141 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10684 mSolverCounterSat, 5989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9141 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 16673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5989 IncrementalHoareTripleChecker+Valid, 10684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:58:28,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9141 Valid, 505 Invalid, 16673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5989 Valid, 10684 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2023-04-01 20:58:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2023-04-01 20:58:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 5769. [2023-04-01 20:58:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5769 states, 5700 states have (on average 1.7549122807017543) internal successors, (10003), 5703 states have internal predecessors, (10003), 26 states have call successors, (26), 26 states have call predecessors, (26), 42 states have return successors, (96), 39 states have call predecessors, (96), 25 states have call successors, (96) [2023-04-01 20:58:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 10125 transitions. [2023-04-01 20:58:29,116 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 10125 transitions. Word has length 1660 [2023-04-01 20:58:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:58:29,121 INFO L495 AbstractCegarLoop]: Abstraction has 5769 states and 10125 transitions. [2023-04-01 20:58:29,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 412.25) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:58:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 10125 transitions. [2023-04-01 20:58:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1683 [2023-04-01 20:58:29,217 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:58:29,218 INFO L195 NwaCegarLoop]: trace histogram [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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:58:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:58:29,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:58:29,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:58:29,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2021696646, now seen corresponding path program 1 times [2023-04-01 20:58:29,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:58:29,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584667504] [2023-04-01 20:58:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:58:29,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:58:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:34,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:58:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:34,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:58:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:58:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:58:34,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584667504] [2023-04-01 20:58:34,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584667504] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:58:34,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379718096] [2023-04-01 20:58:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:58:34,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:58:34,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:58:34,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:58:34,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:58:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:34,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 20:58:34,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:58:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:58:36,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:58:36,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379718096] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:58:36,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:58:36,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 20:58:36,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030744914] [2023-04-01 20:58:36,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:58:36,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:58:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:58:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:58:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:58:36,840 INFO L87 Difference]: Start difference. First operand 5769 states and 10125 transitions. Second operand has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 3 states have internal predecessors, (1669), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:58:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:58:42,607 INFO L93 Difference]: Finished difference Result 16917 states and 30089 transitions. [2023-04-01 20:58:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:58:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 3 states have internal predecessors, (1669), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1682 [2023-04-01 20:58:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:58:42,664 INFO L225 Difference]: With dead ends: 16917 [2023-04-01 20:58:42,664 INFO L226 Difference]: Without dead ends: 11154 [2023-04-01 20:58:42,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:58:42,678 INFO L413 NwaCegarLoop]: 4109 mSDtfsCounter, 432 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 6669 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 4580 SdHoareTripleChecker+Invalid, 7539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 6669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:58:42,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 4580 Invalid, 7539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 6669 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-04-01 20:58:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2023-04-01 20:58:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 11112. [2023-04-01 20:58:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11112 states, 10979 states have (on average 1.6035158028964387) internal successors, (17605), 10985 states have internal predecessors, (17605), 50 states have call successors, (50), 50 states have call predecessors, (50), 82 states have return successors, (322), 76 states have call predecessors, (322), 49 states have call successors, (322) [2023-04-01 20:58:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11112 states to 11112 states and 17977 transitions. [2023-04-01 20:58:42,948 INFO L78 Accepts]: Start accepts. Automaton has 11112 states and 17977 transitions. Word has length 1682 [2023-04-01 20:58:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:58:42,951 INFO L495 AbstractCegarLoop]: Abstraction has 11112 states and 17977 transitions. [2023-04-01 20:58:42,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 3 states have internal predecessors, (1669), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:58:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 11112 states and 17977 transitions. [2023-04-01 20:58:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1698 [2023-04-01 20:58:43,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:58:43,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:58:43,018 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 20:58:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:58:43,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:58:43,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:58:43,216 INFO L85 PathProgramCache]: Analyzing trace with hash -745535197, now seen corresponding path program 1 times [2023-04-01 20:58:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:58:43,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712376891] [2023-04-01 20:58:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:58:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:58:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:45,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:58:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:45,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:58:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:45,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 20:58:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:58:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:58:45,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:58:45,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712376891] [2023-04-01 20:58:45,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712376891] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:58:45,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:58:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:58:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562692112] [2023-04-01 20:58:45,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:58:45,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 20:58:45,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:58:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 20:58:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:58:45,197 INFO L87 Difference]: Start difference. First operand 11112 states and 17977 transitions. Second operand has 6 states, 6 states have (on average 279.0) internal successors, (1674), 4 states have internal predecessors, (1674), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:59:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:59:01,763 INFO L93 Difference]: Finished difference Result 53807 states and 90166 transitions. [2023-04-01 20:59:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 20:59:01,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 279.0) internal successors, (1674), 4 states have internal predecessors, (1674), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 1697 [2023-04-01 20:59:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:59:01,927 INFO L225 Difference]: With dead ends: 53807 [2023-04-01 20:59:01,927 INFO L226 Difference]: Without dead ends: 42701 [2023-04-01 20:59:01,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:59:01,972 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 14373 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 15693 mSolverCounterSat, 4976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14373 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 20669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4976 IncrementalHoareTripleChecker+Valid, 15693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:59:01,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14373 Valid, 927 Invalid, 20669 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4976 Valid, 15693 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2023-04-01 20:59:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42701 states. [2023-04-01 20:59:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42701 to 42691. [2023-04-01 20:59:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42691 states, 42130 states have (on average 1.3655827201519108) internal successors, (57532), 42154 states have internal predecessors, (57532), 194 states have call successors, (194), 194 states have call predecessors, (194), 366 states have return successors, (3077), 342 states have call predecessors, (3077), 193 states have call successors, (3077) [2023-04-01 20:59:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42691 states to 42691 states and 60803 transitions. [2023-04-01 20:59:02,930 INFO L78 Accepts]: Start accepts. Automaton has 42691 states and 60803 transitions. Word has length 1697 [2023-04-01 20:59:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:59:02,930 INFO L495 AbstractCegarLoop]: Abstraction has 42691 states and 60803 transitions. [2023-04-01 20:59:02,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 279.0) internal successors, (1674), 4 states have internal predecessors, (1674), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:59:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 42691 states and 60803 transitions. [2023-04-01 20:59:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1819 [2023-04-01 20:59:03,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:59:03,060 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:59:03,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:59:03,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:59:03,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:59:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1193888305, now seen corresponding path program 1 times [2023-04-01 20:59:03,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:59:03,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715751982] [2023-04-01 20:59:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:59:03,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:59:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:59:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:05,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:59:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:05,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-01 20:59:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:05,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-04-01 20:59:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 147 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 20:59:05,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:59:05,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715751982] [2023-04-01 20:59:05,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715751982] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:59:05,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790548819] [2023-04-01 20:59:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:59:05,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:59:05,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:59:05,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:59:05,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:59:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:05,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 2358 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:59:05,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:59:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2023-04-01 20:59:06,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:59:06,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790548819] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:59:06,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:59:06,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 20:59:06,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278156123] [2023-04-01 20:59:06,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:59:06,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:59:06,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:59:06,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:59:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:59:06,094 INFO L87 Difference]: Start difference. First operand 42691 states and 60803 transitions. Second operand has 5 states, 5 states have (on average 332.2) internal successors, (1661), 4 states have internal predecessors, (1661), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:59:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:59:14,670 INFO L93 Difference]: Finished difference Result 126711 states and 190689 transitions. [2023-04-01 20:59:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:59:14,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 332.2) internal successors, (1661), 4 states have internal predecessors, (1661), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 1818 [2023-04-01 20:59:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:59:15,040 INFO L225 Difference]: With dead ends: 126711 [2023-04-01 20:59:15,040 INFO L226 Difference]: Without dead ends: 84026 [2023-04-01 20:59:15,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1832 GetRequests, 1820 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:59:15,131 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 5956 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 10839 mSolverCounterSat, 3771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5956 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 14610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3771 IncrementalHoareTripleChecker+Valid, 10839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:59:15,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5956 Valid, 1986 Invalid, 14610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3771 Valid, 10839 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-04-01 20:59:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84026 states. [2023-04-01 20:59:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84026 to 83805. [2023-04-01 20:59:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83805 states, 82417 states have (on average 1.2939199437009354) internal successors, (106641), 82519 states have internal predecessors, (106641), 378 states have call successors, (378), 378 states have call predecessors, (378), 1009 states have return successors, (12896), 907 states have call predecessors, (12896), 377 states have call successors, (12896) [2023-04-01 20:59:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83805 states to 83805 states and 119915 transitions. [2023-04-01 20:59:17,206 INFO L78 Accepts]: Start accepts. Automaton has 83805 states and 119915 transitions. Word has length 1818 [2023-04-01 20:59:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:59:17,206 INFO L495 AbstractCegarLoop]: Abstraction has 83805 states and 119915 transitions. [2023-04-01 20:59:17,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 332.2) internal successors, (1661), 4 states have internal predecessors, (1661), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:59:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 83805 states and 119915 transitions. [2023-04-01 20:59:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1824 [2023-04-01 20:59:17,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:59:17,379 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:59:17,391 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 20:59:17,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 20:59:17,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:59:17,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:59:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1657326709, now seen corresponding path program 1 times [2023-04-01 20:59:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:59:17,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996379937] [2023-04-01 20:59:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:59:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:59:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:19,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:59:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:19,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:59:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:19,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:59:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:19,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 20:59:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 164 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 20:59:19,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:59:19,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996379937] [2023-04-01 20:59:19,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996379937] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:59:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221088264] [2023-04-01 20:59:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:59:19,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:59:19,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:59:19,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:59:19,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:59:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:20,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 2349 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 20:59:20,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:59:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 20:59:20,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:59:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221088264] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:59:20,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:59:20,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:59:20,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209983800] [2023-04-01 20:59:20,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:59:20,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:59:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:59:20,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:59:20,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:59:20,452 INFO L87 Difference]: Start difference. First operand 83805 states and 119915 transitions. Second operand has 3 states, 3 states have (on average 589.0) internal successors, (1767), 3 states have internal predecessors, (1767), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:59:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:59:26,914 INFO L93 Difference]: Finished difference Result 206354 states and 301466 transitions. [2023-04-01 20:59:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:59:26,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 589.0) internal successors, (1767), 3 states have internal predecessors, (1767), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 1823 [2023-04-01 20:59:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:59:27,736 INFO L225 Difference]: With dead ends: 206354 [2023-04-01 20:59:27,736 INFO L226 Difference]: Without dead ends: 122555 [2023-04-01 20:59:27,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1835 GetRequests, 1829 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:59:27,829 INFO L413 NwaCegarLoop]: 4024 mSDtfsCounter, 1849 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 5888 mSolverCounterSat, 1356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 4454 SdHoareTripleChecker+Invalid, 7244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 5888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:59:27,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1849 Valid, 4454 Invalid, 7244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1356 Valid, 5888 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 20:59:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122555 states. [2023-04-01 20:59:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122555 to 122551. [2023-04-01 20:59:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122551 states, 120570 states have (on average 1.2360288629012193) internal successors, (149028), 120713 states have internal predecessors, (149028), 554 states have call successors, (554), 554 states have call predecessors, (554), 1426 states have return successors, (20659), 1283 states have call predecessors, (20659), 553 states have call successors, (20659) [2023-04-01 20:59:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122551 states to 122551 states and 170241 transitions. [2023-04-01 20:59:30,846 INFO L78 Accepts]: Start accepts. Automaton has 122551 states and 170241 transitions. Word has length 1823 [2023-04-01 20:59:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:59:30,847 INFO L495 AbstractCegarLoop]: Abstraction has 122551 states and 170241 transitions. [2023-04-01 20:59:30,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 589.0) internal successors, (1767), 3 states have internal predecessors, (1767), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:59:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 122551 states and 170241 transitions. [2023-04-01 20:59:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1868 [2023-04-01 20:59:31,420 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:59:31,421 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:59:31,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:59:31,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:59:31,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:59:31,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:59:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1604467648, now seen corresponding path program 1 times [2023-04-01 20:59:31,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:59:31,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048947224] [2023-04-01 20:59:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:59:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:59:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:33,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:59:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:33,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:59:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:33,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:59:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:59:33,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:59:33,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048947224] [2023-04-01 20:59:33,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048947224] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:59:33,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409033448] [2023-04-01 20:59:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:59:33,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:59:33,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:59:33,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:59:33,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:59:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:34,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 2334 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:59:34,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:59:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:59:34,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:59:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:59:35,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409033448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:59:35,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:59:35,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:59:35,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090424189] [2023-04-01 20:59:35,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:59:35,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:59:35,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:59:35,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:59:35,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:59:35,469 INFO L87 Difference]: Start difference. First operand 122551 states and 170241 transitions. Second operand has 12 states, 12 states have (on average 186.75) internal successors, (2241), 10 states have internal predecessors, (2241), 4 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:59:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:59:48,245 INFO L93 Difference]: Finished difference Result 287810 states and 416146 transitions. [2023-04-01 20:59:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 20:59:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 186.75) internal successors, (2241), 10 states have internal predecessors, (2241), 4 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 1867 [2023-04-01 20:59:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:59:49,343 INFO L225 Difference]: With dead ends: 287810 [2023-04-01 20:59:49,344 INFO L226 Difference]: Without dead ends: 165265 [2023-04-01 20:59:49,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3755 GetRequests, 3735 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-04-01 20:59:49,441 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 15629 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 15236 mSolverCounterSat, 4425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15629 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 19661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4425 IncrementalHoareTripleChecker+Valid, 15236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:59:49,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15629 Valid, 1443 Invalid, 19661 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4425 Valid, 15236 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-04-01 20:59:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165265 states. [2023-04-01 20:59:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165265 to 161553. [2023-04-01 20:59:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161553 states, 158272 states have (on average 1.148857662757784) internal successors, (181832), 158605 states have internal predecessors, (181832), 722 states have call successors, (722), 722 states have call predecessors, (722), 2558 states have return successors, (28969), 2225 states have call predecessors, (28969), 721 states have call successors, (28969) [2023-04-01 20:59:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161553 states to 161553 states and 211523 transitions. [2023-04-01 20:59:52,877 INFO L78 Accepts]: Start accepts. Automaton has 161553 states and 211523 transitions. Word has length 1867 [2023-04-01 20:59:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:59:52,877 INFO L495 AbstractCegarLoop]: Abstraction has 161553 states and 211523 transitions. [2023-04-01 20:59:52,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 186.75) internal successors, (2241), 10 states have internal predecessors, (2241), 4 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:59:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 161553 states and 211523 transitions. [2023-04-01 20:59:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1967 [2023-04-01 20:59:53,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:59:53,348 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:59:53,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:59:53,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:59:53,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:59:53,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:59:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1800713246, now seen corresponding path program 1 times [2023-04-01 20:59:53,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:59:53,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421449106] [2023-04-01 20:59:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:59:53,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:59:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:55,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:59:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:55,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:59:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:55,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 20:59:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 300 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:59:55,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:59:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421449106] [2023-04-01 20:59:55,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421449106] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:59:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214877914] [2023-04-01 20:59:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:59:55,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:59:55,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:59:55,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:59:55,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:59:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:59:56,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 2434 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:59:56,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:59:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 408 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:59:56,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:59:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 408 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:59:57,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214877914] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:59:57,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:59:57,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:59:57,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460441841] [2023-04-01 20:59:57,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:59:57,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:59:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:59:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:59:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:59:57,077 INFO L87 Difference]: Start difference. First operand 161553 states and 211523 transitions. Second operand has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 10 states have internal predecessors, (2341), 4 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 21:00:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 21:00:19,260 INFO L93 Difference]: Finished difference Result 398533 states and 554247 transitions. [2023-04-01 21:00:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 21:00:19,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 10 states have internal predecessors, (2341), 4 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 1966 [2023-04-01 21:00:19,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 21:00:20,204 INFO L225 Difference]: With dead ends: 398533 [2023-04-01 21:00:20,204 INFO L226 Difference]: Without dead ends: 236986 [2023-04-01 21:00:20,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3953 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 21:00:20,335 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 15964 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 24572 mSolverCounterSat, 6985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15964 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 31557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6985 IncrementalHoareTripleChecker+Valid, 24572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2023-04-01 21:00:20,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15964 Valid, 1934 Invalid, 31557 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6985 Valid, 24572 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time] [2023-04-01 21:00:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236986 states. [2023-04-01 21:00:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236986 to 216955. [2023-04-01 21:00:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216955 states, 211895 states have (on average 1.0978786663205833) internal successors, (232635), 212535 states have internal predecessors, (232635), 962 states have call successors, (962), 962 states have call predecessors, (962), 4097 states have return successors, (38378), 3457 states have call predecessors, (38378), 961 states have call successors, (38378) [2023-04-01 21:00:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216955 states to 216955 states and 271975 transitions. [2023-04-01 21:00:25,153 INFO L78 Accepts]: Start accepts. Automaton has 216955 states and 271975 transitions. Word has length 1966 [2023-04-01 21:00:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 21:00:25,153 INFO L495 AbstractCegarLoop]: Abstraction has 216955 states and 271975 transitions. [2023-04-01 21:00:25,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 10 states have internal predecessors, (2341), 4 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 21:00:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 216955 states and 271975 transitions. [2023-04-01 21:00:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2026 [2023-04-01 21:00:25,736 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 21:00:25,737 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:25,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 21:00:25,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 21:00:25,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 21:00:25,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 21:00:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 459952599, now seen corresponding path program 1 times [2023-04-01 21:00:25,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 21:00:25,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487435964] [2023-04-01 21:00:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 21:00:25,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 21:00:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 21:00:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:27,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 21:00:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:27,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 21:00:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:27,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-04-01 21:00:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-04-01 21:00:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:27,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-04-01 21:00:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 381 proven. 140 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-04-01 21:00:27,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 21:00:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487435964] [2023-04-01 21:00:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487435964] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 21:00:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071710775] [2023-04-01 21:00:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 21:00:27,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 21:00:27,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 21:00:27,703 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 21:00:27,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 21:00:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:28,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 21:00:28,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 21:00:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-04-01 21:00:28,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 21:00:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 382 proven. 143 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-04-01 21:00:28,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071710775] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 21:00:28,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 21:00:28,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 21:00:28,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229160705] [2023-04-01 21:00:28,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 21:00:28,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 21:00:28,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 21:00:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 21:00:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 21:00:28,738 INFO L87 Difference]: Start difference. First operand 216955 states and 271975 transitions. Second operand has 11 states, 11 states have (on average 187.9090909090909) internal successors, (2067), 9 states have internal predecessors, (2067), 4 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 21:00:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 21:00:47,459 INFO L93 Difference]: Finished difference Result 473247 states and 595206 transitions. [2023-04-01 21:00:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 21:00:47,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 187.9090909090909) internal successors, (2067), 9 states have internal predecessors, (2067), 4 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 2025 [2023-04-01 21:00:47,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 21:00:48,471 INFO L225 Difference]: With dead ends: 473247 [2023-04-01 21:00:48,472 INFO L226 Difference]: Without dead ends: 256298 [2023-04-01 21:00:48,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4086 GetRequests, 4065 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 21:00:48,646 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 9512 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 27864 mSolverCounterSat, 4501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9514 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 32365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4501 IncrementalHoareTripleChecker+Valid, 27864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-04-01 21:00:48,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9514 Valid, 1762 Invalid, 32365 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4501 Valid, 27864 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2023-04-01 21:00:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256298 states. [2023-04-01 21:00:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256298 to 252020. [2023-04-01 21:00:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252020 states, 246470 states have (on average 1.0679311883799245) internal successors, (263213), 247151 states have internal predecessors, (263213), 1123 states have call successors, (1123), 1122 states have call predecessors, (1123), 4426 states have return successors, (32296), 3746 states have call predecessors, (32296), 1122 states have call successors, (32296) [2023-04-01 21:00:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252020 states to 252020 states and 296632 transitions. [2023-04-01 21:00:53,898 INFO L78 Accepts]: Start accepts. Automaton has 252020 states and 296632 transitions. Word has length 2025 [2023-04-01 21:00:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 21:00:53,899 INFO L495 AbstractCegarLoop]: Abstraction has 252020 states and 296632 transitions. [2023-04-01 21:00:53,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 187.9090909090909) internal successors, (2067), 9 states have internal predecessors, (2067), 4 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 21:00:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 252020 states and 296632 transitions. [2023-04-01 21:00:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2139 [2023-04-01 21:00:54,700 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 21:00:54,701 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:54,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 21:00:54,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 21:00:54,911 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 21:00:54,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 21:00:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1163172344, now seen corresponding path program 1 times [2023-04-01 21:00:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 21:00:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247166775] [2023-04-01 21:00:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 21:00:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 21:00:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:58,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 21:00:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:58,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 21:00:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-04-01 21:00:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:58,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-04-01 21:00:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:58,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2023-04-01 21:00:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 21:00:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 463 proven. 105 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-04-01 21:00:58,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 21:00:58,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247166775] [2023-04-01 21:00:58,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247166775] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 21:00:58,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972946305] [2023-04-01 21:00:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 21:00:58,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 21:00:58,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 21:00:58,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 21:00:58,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 21:00:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 21:00:59,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 21:00:59,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 21:00:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2023-04-01 21:00:59,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 21:00:59,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972946305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 21:00:59,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 21:00:59,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-04-01 21:00:59,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284817179] [2023-04-01 21:00:59,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 21:00:59,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 21:00:59,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 21:00:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 21:00:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 21:00:59,292 INFO L87 Difference]: Start difference. First operand 252020 states and 296632 transitions. Second operand has 5 states, 5 states have (on average 338.6) internal successors, (1693), 4 states have internal predecessors, (1693), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 21:01:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 21:01:09,667 INFO L93 Difference]: Finished difference Result 586229 states and 697567 transitions. [2023-04-01 21:01:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 21:01:09,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 338.6) internal successors, (1693), 4 states have internal predecessors, (1693), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 2138 [2023-04-01 21:01:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted.