/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 00:01:27,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 00:01:27,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 00:01:27,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 00:01:27,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 00:01:27,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 00:01:27,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 00:01:27,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 00:01:27,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 00:01:27,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 00:01:27,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 00:01:27,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 00:01:27,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 00:01:27,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 00:01:27,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 00:01:27,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 00:01:27,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 00:01:27,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 00:01:27,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 00:01:27,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 00:01:27,513 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 [2023-04-02 00:01:27,525 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 00:01:27,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 00:01:27,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 00:01:27,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 00:01:27,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 00:01:27,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 00:01:27,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 00:01:27,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 00:01:27,527 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 00:01:27,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 00:01:27,527 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 00:01:27,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 00:01:27,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 00:01:27,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 00:01:27,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 00:01:27,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 00:01:27,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:01:27,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 00:01:27,529 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 00:01:27,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 00:01:27,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 00:01:27,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 00:01:27,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 00:01:27,813 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 00:01:27,814 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 00:01:27,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label49.c [2023-04-02 00:01:28,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 00:01:29,283 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 00:01:29,284 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label49.c [2023-04-02 00:01:29,318 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8d0fde14/f9485e87596b4d388a0a21253879da6f/FLAGe64ec5514 [2023-04-02 00:01:29,327 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8d0fde14/f9485e87596b4d388a0a21253879da6f [2023-04-02 00:01:29,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 00:01:29,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 00:01:29,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 00:01:29,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 00:01:29,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 00:01:29,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:01:29" (1/1) ... [2023-04-02 00:01:29,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384aab71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:29, skipping insertion in model container [2023-04-02 00:01:29,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:01:29" (1/1) ... [2023-04-02 00:01:29,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 00:01:29,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 00:01:29,705 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label49.c[5659,5672] [2023-04-02 00:01:30,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:01:30,588 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 00:01:30,610 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label49.c[5659,5672] [2023-04-02 00:01:31,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:01:31,141 INFO L208 MainTranslator]: Completed translation [2023-04-02 00:01:31,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31 WrapperNode [2023-04-02 00:01:31,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 00:01:31,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 00:01:31,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 00:01:31,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 00:01:31,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,353 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 00:01:31,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 00:01:31,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 00:01:31,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 00:01:31,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (1/1) ... [2023-04-02 00:01:31,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:01:31,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:01:31,438 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) [2023-04-02 00:01:31,456 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 [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-02 00:01:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 00:01:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 00:01:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 00:01:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 00:01:31,755 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 00:01:31,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 00:01:37,635 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 00:01:37,684 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 00:01:37,684 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 00:01:37,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:01:37 BoogieIcfgContainer [2023-04-02 00:01:37,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 00:01:37,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 00:01:37,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 00:01:37,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 00:01:37,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 12:01:29" (1/3) ... [2023-04-02 00:01:37,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301d91c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:01:37, skipping insertion in model container [2023-04-02 00:01:37,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:31" (2/3) ... [2023-04-02 00:01:37,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301d91c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:01:37, skipping insertion in model container [2023-04-02 00:01:37,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:01:37" (3/3) ... [2023-04-02 00:01:37,721 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label49.c [2023-04-02 00:01:37,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 00:01:37,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 00:01:37,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 00:01:37,873 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;@4db88f04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 00:01:37,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 00:01:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 00:01:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 00:01:37,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:01:37,916 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] [2023-04-02 00:01:37,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:01:37,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:01:37,919 INFO L85 PathProgramCache]: Analyzing trace with hash 346402548, now seen corresponding path program 1 times [2023-04-02 00:01:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:01:37,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820912990] [2023-04-02 00:01:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:01:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:01:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:01:38,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:01:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:01:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:01:38,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:01:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820912990] [2023-04-02 00:01:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820912990] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:01:38,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:01:38,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 00:01:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456072820] [2023-04-02 00:01:38,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:01:38,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:01:38,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:01:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:01:38,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:01:38,643 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:01:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:01:49,760 INFO L93 Difference]: Finished difference Result 5076 states and 9543 transitions. [2023-04-02 00:01:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 00:01:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-02 00:01:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:01:49,781 INFO L225 Difference]: With dead ends: 5076 [2023-04-02 00:01:49,782 INFO L226 Difference]: Without dead ends: 3219 [2023-04-02 00:01:49,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:01:49,791 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4646 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 1544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4646 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1544 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-04-02 00:01:49,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4646 Valid, 384 Invalid, 8871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1544 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-04-02 00:01:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-04-02 00:01:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3194. [2023-04-02 00:01:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3154 states have (on average 1.592263792010146) internal successors, (5022), 3156 states have internal predecessors, (5022), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (37), 23 states have call predecessors, (37), 13 states have call successors, (37) [2023-04-02 00:01:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5073 transitions. [2023-04-02 00:01:49,899 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5073 transitions. Word has length 48 [2023-04-02 00:01:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:01:49,899 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 5073 transitions. [2023-04-02 00:01:49,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:01:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5073 transitions. [2023-04-02 00:01:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-02 00:01:49,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:01:49,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 00:01:49,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 00:01:49,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:01:49,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:01:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1707862781, now seen corresponding path program 1 times [2023-04-02 00:01:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:01:49,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351948194] [2023-04-02 00:01:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:01:49,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:01:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:01:50,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:01:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:01:50,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:01:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:01:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:01:50,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:01:50,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351948194] [2023-04-02 00:01:50,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351948194] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:01:50,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:01:50,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 00:01:50,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213059375] [2023-04-02 00:01:50,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:01:50,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 00:01:50,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:01:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 00:01:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:01:50,112 INFO L87 Difference]: Start difference. First operand 3194 states and 5073 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:02:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:02:16,870 INFO L93 Difference]: Finished difference Result 20617 states and 33713 transitions. [2023-04-02 00:02:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 00:02:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 119 [2023-04-02 00:02:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:02:16,937 INFO L225 Difference]: With dead ends: 20617 [2023-04-02 00:02:16,937 INFO L226 Difference]: Without dead ends: 17429 [2023-04-02 00:02:16,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-04-02 00:02:16,951 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 11623 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 28036 mSolverCounterSat, 3776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11623 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 31812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3776 IncrementalHoareTripleChecker+Valid, 28036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2023-04-02 00:02:16,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11623 Valid, 1043 Invalid, 31812 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3776 Valid, 28036 Invalid, 0 Unknown, 0 Unchecked, 26.0s Time] [2023-04-02 00:02:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2023-04-02 00:02:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 17373. [2023-04-02 00:02:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17373 states, 17154 states have (on average 1.3166025416812406) internal successors, (22585), 17166 states have internal predecessors, (22585), 74 states have call successors, (74), 74 states have call predecessors, (74), 144 states have return successors, (810), 132 states have call predecessors, (810), 73 states have call successors, (810) [2023-04-02 00:02:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 23469 transitions. [2023-04-02 00:02:17,268 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 23469 transitions. Word has length 119 [2023-04-02 00:02:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:02:17,269 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 23469 transitions. [2023-04-02 00:02:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:02:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 23469 transitions. [2023-04-02 00:02:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 00:02:17,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:17,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 00:02:17,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 00:02:17,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:17,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:17,276 INFO L85 PathProgramCache]: Analyzing trace with hash -398137819, now seen corresponding path program 1 times [2023-04-02 00:02:17,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:17,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378933225] [2023-04-02 00:02:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:17,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:17,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:17,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:02:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:17,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:17,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378933225] [2023-04-02 00:02:17,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378933225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:17,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:02:17,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 00:02:17,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563397505] [2023-04-02 00:02:17,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:17,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 00:02:17,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:17,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 00:02:17,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:02:17,923 INFO L87 Difference]: Start difference. First operand 17373 states and 23469 transitions. Second operand has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:02:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:02:29,331 INFO L93 Difference]: Finished difference Result 51229 states and 72277 transitions. [2023-04-02 00:02:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 00:02:29,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 149 [2023-04-02 00:02:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:02:29,640 INFO L225 Difference]: With dead ends: 51229 [2023-04-02 00:02:29,641 INFO L226 Difference]: Without dead ends: 33862 [2023-04-02 00:02:29,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:02:29,671 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 8899 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 10631 mSolverCounterSat, 2137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8899 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 12768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2137 IncrementalHoareTripleChecker+Valid, 10631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-04-02 00:02:29,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8899 Valid, 1102 Invalid, 12768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2137 Valid, 10631 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-04-02 00:02:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2023-04-02 00:02:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 33708. [2023-04-02 00:02:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33708 states, 33057 states have (on average 1.2129352330822518) internal successors, (40096), 33128 states have internal predecessors, (40096), 140 states have call successors, (140), 140 states have call predecessors, (140), 510 states have return successors, (3490), 439 states have call predecessors, (3490), 139 states have call successors, (3490) [2023-04-02 00:02:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33708 states to 33708 states and 43726 transitions. [2023-04-02 00:02:30,161 INFO L78 Accepts]: Start accepts. Automaton has 33708 states and 43726 transitions. Word has length 149 [2023-04-02 00:02:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:02:30,162 INFO L495 AbstractCegarLoop]: Abstraction has 33708 states and 43726 transitions. [2023-04-02 00:02:30,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:02:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 33708 states and 43726 transitions. [2023-04-02 00:02:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-04-02 00:02:30,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:30,169 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 00:02:30,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 00:02:30,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:30,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:30,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1479283326, now seen corresponding path program 1 times [2023-04-02 00:02:30,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:30,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890688] [2023-04-02 00:02:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:30,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:30,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:30,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:02:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:30,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-02 00:02:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 82 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 00:02:30,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890688] [2023-04-02 00:02:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890688] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:02:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455086581] [2023-04-02 00:02:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:30,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:02:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:02:30,705 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) [2023-04-02 00:02:30,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 00:02:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:30,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 00:02:30,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:02:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 00:02:31,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:02:31,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455086581] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:31,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:02:31,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-04-02 00:02:31,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7021324] [2023-04-02 00:02:31,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:31,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 00:02:31,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 00:02:31,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 00:02:31,043 INFO L87 Difference]: Start difference. First operand 33708 states and 43726 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 00:02:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:02:39,737 INFO L93 Difference]: Finished difference Result 101284 states and 135130 transitions. [2023-04-02 00:02:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 00:02:39,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 243 [2023-04-02 00:02:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:02:39,965 INFO L225 Difference]: With dead ends: 101284 [2023-04-02 00:02:39,966 INFO L226 Difference]: Without dead ends: 67582 [2023-04-02 00:02:40,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-02 00:02:40,031 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 7865 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 8317 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7865 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 9217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 8317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-04-02 00:02:40,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7865 Valid, 993 Invalid, 9217 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [900 Valid, 8317 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-04-02 00:02:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67582 states. [2023-04-02 00:02:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67582 to 59046. [2023-04-02 00:02:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59046 states, 57641 states have (on average 1.2045766034593433) internal successors, (69433), 57833 states have internal predecessors, (69433), 242 states have call successors, (242), 242 states have call predecessors, (242), 1162 states have return successors, (7722), 970 states have call predecessors, (7722), 241 states have call successors, (7722) [2023-04-02 00:02:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59046 states to 59046 states and 77397 transitions. [2023-04-02 00:02:41,433 INFO L78 Accepts]: Start accepts. Automaton has 59046 states and 77397 transitions. Word has length 243 [2023-04-02 00:02:41,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:02:41,434 INFO L495 AbstractCegarLoop]: Abstraction has 59046 states and 77397 transitions. [2023-04-02 00:02:41,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 00:02:41,434 INFO L276 IsEmpty]: Start isEmpty. Operand 59046 states and 77397 transitions. [2023-04-02 00:02:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2023-04-02 00:02:41,438 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:41,441 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 00:02:41,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 00:02:41,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:02:41,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:41,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:41,647 INFO L85 PathProgramCache]: Analyzing trace with hash 737555497, now seen corresponding path program 1 times [2023-04-02 00:02:41,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:41,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153105755] [2023-04-02 00:02:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:42,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:42,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:02:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:42,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-02 00:02:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 243 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 00:02:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153105755] [2023-04-02 00:02:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153105755] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:02:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473593891] [2023-04-02 00:02:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:42,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:02:42,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:02:42,458 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) [2023-04-02 00:02:42,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 00:02:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:42,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:02:42,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:02:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:42,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:02:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:43,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473593891] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:02:43,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:02:43,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-02 00:02:43,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975239838] [2023-04-02 00:02:43,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:02:43,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:02:43,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:02:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:02:43,306 INFO L87 Difference]: Start difference. First operand 59046 states and 77397 transitions. Second operand has 12 states, 12 states have (on average 62.0) internal successors, (744), 10 states have internal predecessors, (744), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 00:03:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:01,985 INFO L93 Difference]: Finished difference Result 181438 states and 260314 transitions. [2023-04-02 00:03:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 00:03:01,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 62.0) internal successors, (744), 10 states have internal predecessors, (744), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 423 [2023-04-02 00:03:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:02,773 INFO L225 Difference]: With dead ends: 181438 [2023-04-02 00:03:02,774 INFO L226 Difference]: Without dead ends: 122398 [2023-04-02 00:03:02,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 848 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2023-04-02 00:03:02,866 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 12632 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 24665 mSolverCounterSat, 7177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12632 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 31842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7177 IncrementalHoareTripleChecker+Valid, 24665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:02,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12632 Valid, 1743 Invalid, 31842 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7177 Valid, 24665 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2023-04-02 00:03:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122398 states. [2023-04-02 00:03:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122398 to 120454. [2023-04-02 00:03:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120454 states, 116970 states have (on average 1.1985038898862956) internal successors, (140189), 117555 states have internal predecessors, (140189), 488 states have call successors, (488), 488 states have call predecessors, (488), 2995 states have return successors, (27292), 2410 states have call predecessors, (27292), 487 states have call successors, (27292) [2023-04-02 00:03:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120454 states to 120454 states and 167969 transitions. [2023-04-02 00:03:05,656 INFO L78 Accepts]: Start accepts. Automaton has 120454 states and 167969 transitions. Word has length 423 [2023-04-02 00:03:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:05,657 INFO L495 AbstractCegarLoop]: Abstraction has 120454 states and 167969 transitions. [2023-04-02 00:03:05,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.0) internal successors, (744), 10 states have internal predecessors, (744), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 00:03:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 120454 states and 167969 transitions. [2023-04-02 00:03:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-04-02 00:03:05,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:05,665 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:05,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 00:03:05,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:05,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:05,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash -529791130, now seen corresponding path program 1 times [2023-04-02 00:03:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:05,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375118278] [2023-04-02 00:03:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:05,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-02 00:03:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-04-02 00:03:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 450 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-02 00:03:06,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375118278] [2023-04-02 00:03:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375118278] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:06,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305319323] [2023-04-02 00:03:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:06,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:06,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:06,517 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) [2023-04-02 00:03:06,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 00:03:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:03:06,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 452 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-02 00:03:06,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:03:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 452 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-02 00:03:07,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305319323] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:03:07,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:03:07,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-02 00:03:07,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420226247] [2023-04-02 00:03:07,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:03:07,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:03:07,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:07,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:03:07,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:03:07,283 INFO L87 Difference]: Start difference. First operand 120454 states and 167969 transitions. Second operand has 12 states, 12 states have (on average 63.25) internal successors, (759), 10 states have internal predecessors, (759), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 00:03:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:26,636 INFO L93 Difference]: Finished difference Result 334224 states and 488675 transitions. [2023-04-02 00:03:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 00:03:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 63.25) internal successors, (759), 10 states have internal predecessors, (759), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 646 [2023-04-02 00:03:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:27,547 INFO L225 Difference]: With dead ends: 334224 [2023-04-02 00:03:27,547 INFO L226 Difference]: Without dead ends: 206495 [2023-04-02 00:03:27,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1329 GetRequests, 1305 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2023-04-02 00:03:27,728 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 11504 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 28014 mSolverCounterSat, 3957 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11504 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 31971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3957 IncrementalHoareTripleChecker+Valid, 28014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:27,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11504 Valid, 1664 Invalid, 31971 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3957 Valid, 28014 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2023-04-02 00:03:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206495 states. [2023-04-02 00:03:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206495 to 194375. [2023-04-02 00:03:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194375 states, 188639 states have (on average 1.0985745259463844) internal successors, (207234), 189686 states have internal predecessors, (207234), 788 states have call successors, (788), 788 states have call predecessors, (788), 4947 states have return successors, (32106), 3900 states have call predecessors, (32106), 787 states have call successors, (32106) [2023-04-02 00:03:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194375 states to 194375 states and 240128 transitions. [2023-04-02 00:03:31,993 INFO L78 Accepts]: Start accepts. Automaton has 194375 states and 240128 transitions. Word has length 646 [2023-04-02 00:03:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:31,994 INFO L495 AbstractCegarLoop]: Abstraction has 194375 states and 240128 transitions. [2023-04-02 00:03:31,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.25) internal successors, (759), 10 states have internal predecessors, (759), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 00:03:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 194375 states and 240128 transitions. [2023-04-02 00:03:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2023-04-02 00:03:32,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:32,012 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:32,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 00:03:32,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:32,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:32,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1813929008, now seen corresponding path program 1 times [2023-04-02 00:03:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:32,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597209553] [2023-04-02 00:03:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:32,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:33,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:03:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:33,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:03:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-02 00:03:33,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:33,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597209553] [2023-04-02 00:03:33,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597209553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:33,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146039512] [2023-04-02 00:03:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:33,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:33,187 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) [2023-04-02 00:03:33,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 00:03:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:33,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:03:33,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-02 00:03:33,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:03:33,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146039512] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:03:33,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:03:33,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-02 00:03:33,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672188632] [2023-04-02 00:03:33,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:03:33,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 00:03:33,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 00:03:33,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:03:33,467 INFO L87 Difference]: Start difference. First operand 194375 states and 240128 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 00:03:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:40,757 INFO L93 Difference]: Finished difference Result 392961 states and 485366 transitions. [2023-04-02 00:03:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 00:03:40,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 754 [2023-04-02 00:03:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:41,616 INFO L225 Difference]: With dead ends: 392961 [2023-04-02 00:03:41,617 INFO L226 Difference]: Without dead ends: 199981 [2023-04-02 00:03:41,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:03:41,805 INFO L413 NwaCegarLoop]: 2922 mSDtfsCounter, 1582 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 3666 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 4817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 3666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:41,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 3138 Invalid, 4817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 3666 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-02 00:03:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199981 states. [2023-04-02 00:03:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199981 to 198571. [2023-04-02 00:03:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198571 states, 192788 states have (on average 1.0788586426541071) internal successors, (207991), 193836 states have internal predecessors, (207991), 806 states have call successors, (806), 806 states have call predecessors, (806), 4976 states have return successors, (27506), 3928 states have call predecessors, (27506), 805 states have call successors, (27506) [2023-04-02 00:03:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198571 states to 198571 states and 236303 transitions. [2023-04-02 00:03:46,139 INFO L78 Accepts]: Start accepts. Automaton has 198571 states and 236303 transitions. Word has length 754 [2023-04-02 00:03:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:46,140 INFO L495 AbstractCegarLoop]: Abstraction has 198571 states and 236303 transitions. [2023-04-02 00:03:46,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 00:03:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 198571 states and 236303 transitions. [2023-04-02 00:03:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2023-04-02 00:03:46,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:46,149 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:46,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 00:03:46,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:46,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:46,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:46,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1753584872, now seen corresponding path program 1 times [2023-04-02 00:03:46,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:46,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12927580] [2023-04-02 00:03:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:46,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:46,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:03:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:03:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 00:03:47,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:47,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12927580] [2023-04-02 00:03:47,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12927580] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:47,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079967778] [2023-04-02 00:03:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:47,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:47,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:47,233 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) [2023-04-02 00:03:47,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 00:03:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:03:47,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 00:03:47,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:03:47,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079967778] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:03:47,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:03:47,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-02 00:03:47,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244242212] [2023-04-02 00:03:47,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:03:47,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 00:03:47,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 00:03:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:03:47,557 INFO L87 Difference]: Start difference. First operand 198571 states and 236303 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 00:03:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:55,429 INFO L93 Difference]: Finished difference Result 406990 states and 484261 transitions. [2023-04-02 00:03:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 00:03:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 766 [2023-04-02 00:03:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:56,105 INFO L225 Difference]: With dead ends: 406990 [2023-04-02 00:03:56,105 INFO L226 Difference]: Without dead ends: 208358 [2023-04-02 00:03:56,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:03:56,382 INFO L413 NwaCegarLoop]: 3056 mSDtfsCounter, 1460 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 4942 mSolverCounterSat, 982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 5924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 982 IncrementalHoareTripleChecker+Valid, 4942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:56,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 3260 Invalid, 5924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [982 Valid, 4942 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-02 00:03:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208358 states. [2023-04-02 00:03:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208358 to 201214. [2023-04-02 00:03:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201214 states, 195457 states have (on average 1.062346193791985) internal successors, (207643), 196495 states have internal predecessors, (207643), 818 states have call successors, (818), 818 states have call predecessors, (818), 4938 states have return successors, (22995), 3900 states have call predecessors, (22995), 817 states have call successors, (22995) [2023-04-02 00:04:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201214 states to 201214 states and 231456 transitions. [2023-04-02 00:04:00,041 INFO L78 Accepts]: Start accepts. Automaton has 201214 states and 231456 transitions. Word has length 766 [2023-04-02 00:04:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:04:00,043 INFO L495 AbstractCegarLoop]: Abstraction has 201214 states and 231456 transitions. [2023-04-02 00:04:00,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 00:04:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 201214 states and 231456 transitions. [2023-04-02 00:04:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2023-04-02 00:04:00,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:04:00,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:04:00,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 00:04:00,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:00,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:04:00,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:04:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1261908518, now seen corresponding path program 1 times [2023-04-02 00:04:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:04:00,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296359910] [2023-04-02 00:04:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:00,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:04:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:04:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:04:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:04:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:04:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-02 00:04:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2023-04-02 00:04:01,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:04:01,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296359910] [2023-04-02 00:04:01,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296359910] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:04:01,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893680229] [2023-04-02 00:04:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:01,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:04:01,519 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) [2023-04-02 00:04:01,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 00:04:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 00:04:01,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:04:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-02 00:04:02,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:04:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-02 00:04:02,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893680229] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:04:02,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:04:02,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-04-02 00:04:02,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610046254] [2023-04-02 00:04:02,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:04:02,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:04:02,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:04:02,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:04:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:04:02,353 INFO L87 Difference]: Start difference. First operand 201214 states and 231456 transitions. Second operand has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 10 states have internal predecessors, (766), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 00:04:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:04:42,497 INFO L93 Difference]: Finished difference Result 804393 states and 980290 transitions. [2023-04-02 00:04:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 00:04:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 10 states have internal predecessors, (766), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 848 [2023-04-02 00:04:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:04:44,526 INFO L225 Difference]: With dead ends: 804393 [2023-04-02 00:04:44,526 INFO L226 Difference]: Without dead ends: 583226 [2023-04-02 00:04:44,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1782 GetRequests, 1733 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1914, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 00:04:44,914 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 23122 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 41458 mSolverCounterSat, 7003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23122 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 48461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7003 IncrementalHoareTripleChecker+Valid, 41458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.3s IncrementalHoareTripleChecker+Time [2023-04-02 00:04:44,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23122 Valid, 1958 Invalid, 48461 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7003 Valid, 41458 Invalid, 0 Unknown, 0 Unchecked, 33.3s Time] [2023-04-02 00:04:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583226 states. [2023-04-02 00:04:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583226 to 570176. [2023-04-02 00:04:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570176 states, 557492 states have (on average 1.0563236781873102) internal successors, (588892), 559601 states have internal predecessors, (588892), 2366 states have call successors, (2366), 2366 states have call predecessors, (2366), 10317 states have return successors, (78056), 8208 states have call predecessors, (78056), 2365 states have call successors, (78056) [2023-04-02 00:04:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570176 states to 570176 states and 669314 transitions. [2023-04-02 00:04:54,858 INFO L78 Accepts]: Start accepts. Automaton has 570176 states and 669314 transitions. Word has length 848 [2023-04-02 00:04:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:04:54,859 INFO L495 AbstractCegarLoop]: Abstraction has 570176 states and 669314 transitions. [2023-04-02 00:04:54,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.833333333333336) internal successors, (766), 10 states have internal predecessors, (766), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 00:04:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 570176 states and 669314 transitions. [2023-04-02 00:04:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1109 [2023-04-02 00:04:54,878 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:04:54,878 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, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:04:54,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 00:04:55,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:55,084 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:04:55,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:04:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash -993294972, now seen corresponding path program 1 times [2023-04-02 00:04:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:04:55,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240314314] [2023-04-02 00:04:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:04:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:56,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:04:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:56,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:04:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:56,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:04:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:56,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-02 00:04:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:56,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 601 [2023-04-02 00:04:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:56,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 838 [2023-04-02 00:04:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:57,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 964 [2023-04-02 00:04:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 374 proven. 152 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-04-02 00:04:57,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:04:57,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240314314] [2023-04-02 00:04:57,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240314314] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:04:57,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97350837] [2023-04-02 00:04:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:57,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:57,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:04:57,182 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) [2023-04-02 00:04:57,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 00:04:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:57,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 00:04:57,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:04:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 480 proven. 2 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2023-04-02 00:04:57,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:04:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 480 proven. 2 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2023-04-02 00:04:57,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97350837] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:04:57,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:04:57,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 16 [2023-04-02 00:04:57,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073569865] [2023-04-02 00:04:57,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:04:57,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 00:04:57,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:04:57,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 00:04:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-04-02 00:04:57,917 INFO L87 Difference]: Start difference. First operand 570176 states and 669314 transitions. Second operand has 16 states, 16 states have (on average 63.5) internal successors, (1016), 14 states have internal predecessors, (1016), 6 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11)