/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/Problem18_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:46:11,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:46:11,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:46:11,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:46:11,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:46:11,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:46:11,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:46:11,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:46:11,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:46:11,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:46:11,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:46:11,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:46:11,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:46:11,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:46:11,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:46:11,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:46:11,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:46:11,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:46:11,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:46:11,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:46:11,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:46:11,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:46:11,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:46:11,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:46:11,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:46:11,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:46:11,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:46:11,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:46:11,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:46:11,655 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:46:11,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:46:11,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:46:11,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:46:11,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:46:11,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:46:11,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:46:11,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:46:11,658 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:46:11,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:46:11,659 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:46:11,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:46:11,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:46:11,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:46:11,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:46:11,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:46:11,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:46:11,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:46:11,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:46:11,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:46:11,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:46:11,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:46:11,662 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:46:11,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:46:11,662 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:46:11,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:46:11,663 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:46:11,663 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:46:11,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:46:11,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:46:11,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:46:11,925 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:46:11,925 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:46:11,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label45.c [2023-03-30 23:46:13,041 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:46:13,412 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:46:13,413 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label45.c [2023-03-30 23:46:13,435 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad21c8888/90f6975d29c84527a00758a23230b2fa/FLAGfe1d45936 [2023-03-30 23:46:13,452 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad21c8888/90f6975d29c84527a00758a23230b2fa [2023-03-30 23:46:13,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:46:13,456 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:46:13,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:46:13,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:46:13,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:46:13,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:46:13" (1/1) ... [2023-03-30 23:46:13,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728061fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:13, skipping insertion in model container [2023-03-30 23:46:13,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:46:13" (1/1) ... [2023-03-30 23:46:13,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:46:13,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:46:13,756 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/Problem18_label45.c[3295,3308] [2023-03-30 23:46:14,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:46:14,363 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:46:14,373 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/Problem18_label45.c[3295,3308] [2023-03-30 23:46:14,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:46:14,632 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:46:14,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14 WrapperNode [2023-03-30 23:46:14,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:46:14,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:46:14,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:46:14,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:46:14,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,822 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:46:14,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:46:14,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:46:14,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:46:14,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (1/1) ... [2023-03-30 23:46:14,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:46:14,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:14,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:46:14,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:46:14,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:46:14,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:46:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:46:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:46:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:46:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:46:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:46:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:46:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:46:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:46:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:46:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:46:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:46:15,030 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:46:15,032 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:46:17,903 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:46:17,921 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:46:17,921 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:46:17,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:46:17 BoogieIcfgContainer [2023-03-30 23:46:17,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:46:17,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:46:17,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:46:17,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:46:17,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:46:13" (1/3) ... [2023-03-30 23:46:17,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5e7fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:46:17, skipping insertion in model container [2023-03-30 23:46:17,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:14" (2/3) ... [2023-03-30 23:46:17,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5e7fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:46:17, skipping insertion in model container [2023-03-30 23:46:17,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:46:17" (3/3) ... [2023-03-30 23:46:17,933 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label45.c [2023-03-30 23:46:17,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:46:17,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:46:18,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:46:18,013 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;@2fcb9844, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:46:18,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:46:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 23:46:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-30 23:46:18,027 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:18,027 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] [2023-03-30 23:46:18,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:18,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash 732179102, now seen corresponding path program 1 times [2023-03-30 23:46:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:18,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939434657] [2023-03-30 23:46:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:18,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:18,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:18,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939434657] [2023-03-30 23:46:18,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939434657] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:18,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:18,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:46:18,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108507299] [2023-03-30 23:46:18,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:18,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:46:18,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:18,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:46:18,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:46:18,517 INFO L87 Difference]: Start difference. First operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:46:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:23,000 INFO L93 Difference]: Finished difference Result 2270 states and 4349 transitions. [2023-03-30 23:46:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:46:23,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 35 [2023-03-30 23:46:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:23,036 INFO L225 Difference]: With dead ends: 2270 [2023-03-30 23:46:23,036 INFO L226 Difference]: Without dead ends: 1432 [2023-03-30 23:46:23,051 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 [2023-03-30 23:46:23,054 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2158 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3363 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2158 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 3363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:23,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2158 Valid, 37 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 3363 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-30 23:46:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-03-30 23:46:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1425. [2023-03-30 23:46:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1404 states have (on average 1.5690883190883191) internal successors, (2203), 1406 states have internal predecessors, (2203), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2023-03-30 23:46:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2229 transitions. [2023-03-30 23:46:23,179 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2229 transitions. Word has length 35 [2023-03-30 23:46:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:23,181 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 2229 transitions. [2023-03-30 23:46:23,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:46:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2229 transitions. [2023-03-30 23:46:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-03-30 23:46:23,187 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:23,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:23,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:46:23,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:23,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1032900010, now seen corresponding path program 1 times [2023-03-30 23:46:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:23,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923322394] [2023-03-30 23:46:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:23,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:23,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:23,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:23,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:23,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923322394] [2023-03-30 23:46:23,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923322394] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:23,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:23,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:46:23,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110274714] [2023-03-30 23:46:23,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:23,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:46:23,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:46:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:46:23,615 INFO L87 Difference]: Start difference. First operand 1425 states and 2229 transitions. Second operand has 7 states, 6 states have (on average 16.5) internal successors, (99), 4 states have internal predecessors, (99), 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) [2023-03-30 23:46:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:28,489 INFO L93 Difference]: Finished difference Result 4355 states and 6855 transitions. [2023-03-30 23:46:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:46:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.5) internal successors, (99), 4 states have internal predecessors, (99), 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 105 [2023-03-30 23:46:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:28,509 INFO L225 Difference]: With dead ends: 4355 [2023-03-30 23:46:28,509 INFO L226 Difference]: Without dead ends: 2936 [2023-03-30 23:46:28,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:46:28,519 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3811 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 4845 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3811 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 5671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 4845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:28,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3811 Valid, 123 Invalid, 5671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 4845 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-03-30 23:46:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2023-03-30 23:46:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2886. [2023-03-30 23:46:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2831 states have (on average 1.3733663016601907) internal successors, (3888), 2842 states have internal predecessors, (3888), 14 states have call successors, (14), 14 states have call predecessors, (14), 40 states have return successors, (85), 29 states have call predecessors, (85), 13 states have call successors, (85) [2023-03-30 23:46:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 3987 transitions. [2023-03-30 23:46:28,607 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 3987 transitions. Word has length 105 [2023-03-30 23:46:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:28,608 INFO L495 AbstractCegarLoop]: Abstraction has 2886 states and 3987 transitions. [2023-03-30 23:46:28,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.5) internal successors, (99), 4 states have internal predecessors, (99), 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) [2023-03-30 23:46:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 3987 transitions. [2023-03-30 23:46:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-03-30 23:46:28,619 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:28,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:28,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:46:28,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:28,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:28,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2006976626, now seen corresponding path program 1 times [2023-03-30 23:46:28,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:28,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123181935] [2023-03-30 23:46:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:28,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:28,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:28,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:29,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:29,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123181935] [2023-03-30 23:46:29,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123181935] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:29,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:29,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:46:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898776267] [2023-03-30 23:46:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:29,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:46:29,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:46:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:46:29,048 INFO L87 Difference]: Start difference. First operand 2886 states and 3987 transitions. Second operand has 8 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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) [2023-03-30 23:46:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:35,194 INFO L93 Difference]: Finished difference Result 11696 states and 16595 transitions. [2023-03-30 23:46:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:46:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 167 [2023-03-30 23:46:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:35,233 INFO L225 Difference]: With dead ends: 11696 [2023-03-30 23:46:35,233 INFO L226 Difference]: Without dead ends: 8816 [2023-03-30 23:46:35,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:46:35,242 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3829 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7432 mSolverCounterSat, 1568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 9000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1568 IncrementalHoareTripleChecker+Valid, 7432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:35,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 118 Invalid, 9000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1568 Valid, 7432 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-30 23:46:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2023-03-30 23:46:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 8757. [2023-03-30 23:46:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8556 states have (on average 1.2331697054698456) internal successors, (10551), 8606 states have internal predecessors, (10551), 38 states have call successors, (38), 38 states have call predecessors, (38), 162 states have return successors, (568), 112 states have call predecessors, (568), 37 states have call successors, (568) [2023-03-30 23:46:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 11157 transitions. [2023-03-30 23:46:35,507 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 11157 transitions. Word has length 167 [2023-03-30 23:46:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:35,508 INFO L495 AbstractCegarLoop]: Abstraction has 8757 states and 11157 transitions. [2023-03-30 23:46:35,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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) [2023-03-30 23:46:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 11157 transitions. [2023-03-30 23:46:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-03-30 23:46:35,512 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:35,513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:46:35,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:46:35,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:35,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1181273459, now seen corresponding path program 1 times [2023-03-30 23:46:35,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:35,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867559680] [2023-03-30 23:46:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:35,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:35,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:35,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:46:35,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:35,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867559680] [2023-03-30 23:46:35,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867559680] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:35,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062122150] [2023-03-30 23:46:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:35,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:35,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:35,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:35,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:46:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:35,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:35,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:36,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:36,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062122150] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:36,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:36,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:46:36,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731080104] [2023-03-30 23:46:36,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:36,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:46:36,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:36,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:46:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:46:36,452 INFO L87 Difference]: Start difference. First operand 8757 states and 11157 transitions. Second operand has 11 states, 11 states have (on average 33.09090909090909) internal successors, (364), 9 states have internal predecessors, (364), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:46:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:43,931 INFO L93 Difference]: Finished difference Result 23722 states and 31240 transitions. [2023-03-30 23:46:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-30 23:46:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 33.09090909090909) internal successors, (364), 9 states have internal predecessors, (364), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 230 [2023-03-30 23:46:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:43,988 INFO L225 Difference]: With dead ends: 23722 [2023-03-30 23:46:43,988 INFO L226 Difference]: Without dead ends: 13303 [2023-03-30 23:46:44,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 464 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-03-30 23:46:44,015 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3195 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 12134 mSolverCounterSat, 1890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3198 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 14024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1890 IncrementalHoareTripleChecker+Valid, 12134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:44,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3198 Valid, 224 Invalid, 14024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1890 Valid, 12134 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-03-30 23:46:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13303 states. [2023-03-30 23:46:44,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13303 to 11715. [2023-03-30 23:46:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11715 states, 11430 states have (on average 1.0864391951006125) internal successors, (12418), 11510 states have internal predecessors, (12418), 50 states have call successors, (50), 50 states have call predecessors, (50), 234 states have return successors, (723), 154 states have call predecessors, (723), 49 states have call successors, (723) [2023-03-30 23:46:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11715 states to 11715 states and 13191 transitions. [2023-03-30 23:46:44,296 INFO L78 Accepts]: Start accepts. Automaton has 11715 states and 13191 transitions. Word has length 230 [2023-03-30 23:46:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:44,298 INFO L495 AbstractCegarLoop]: Abstraction has 11715 states and 13191 transitions. [2023-03-30 23:46:44,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 33.09090909090909) internal successors, (364), 9 states have internal predecessors, (364), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:46:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 11715 states and 13191 transitions. [2023-03-30 23:46:44,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-03-30 23:46:44,304 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:44,304 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:44,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:44,509 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 [2023-03-30 23:46:44,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:44,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash -785853318, now seen corresponding path program 1 times [2023-03-30 23:46:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:44,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774147803] [2023-03-30 23:46:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:44,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:44,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:44,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 87 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:44,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:44,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774147803] [2023-03-30 23:46:44,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774147803] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:44,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872899944] [2023-03-30 23:46:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:44,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:44,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:44,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:44,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:46:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:45,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:45,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:45,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:46:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872899944] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:45,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:46:45,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:46:45,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938960241] [2023-03-30 23:46:45,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:45,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:46:45,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:46:45,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:46:45,165 INFO L87 Difference]: Start difference. First operand 11715 states and 13191 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:46:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:47,058 INFO L93 Difference]: Finished difference Result 33457 states and 38616 transitions. [2023-03-30 23:46:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:47,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 351 [2023-03-30 23:46:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:47,132 INFO L225 Difference]: With dead ends: 33457 [2023-03-30 23:46:47,132 INFO L226 Difference]: Without dead ends: 21748 [2023-03-30 23:46:47,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:46:47,161 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 680 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:47,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 931 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:46:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2023-03-30 23:46:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 21743. [2023-03-30 23:46:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21743 states, 21292 states have (on average 1.0749577306030433) internal successors, (22888), 21418 states have internal predecessors, (22888), 92 states have call successors, (92), 92 states have call predecessors, (92), 358 states have return successors, (1698), 232 states have call predecessors, (1698), 91 states have call successors, (1698) [2023-03-30 23:46:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21743 states to 21743 states and 24678 transitions. [2023-03-30 23:46:47,629 INFO L78 Accepts]: Start accepts. Automaton has 21743 states and 24678 transitions. Word has length 351 [2023-03-30 23:46:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:47,630 INFO L495 AbstractCegarLoop]: Abstraction has 21743 states and 24678 transitions. [2023-03-30 23:46:47,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:46:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 21743 states and 24678 transitions. [2023-03-30 23:46:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2023-03-30 23:46:47,637 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:47,638 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:47,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:47,843 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 [2023-03-30 23:46:47,844 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:47,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1657112302, now seen corresponding path program 1 times [2023-03-30 23:46:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:47,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390488967] [2023-03-30 23:46:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:48,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:48,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:48,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:48,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 86 proven. 12 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2023-03-30 23:46:48,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390488967] [2023-03-30 23:46:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390488967] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471954689] [2023-03-30 23:46:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:48,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:48,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:48,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:48,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:46:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:48,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:48,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:46:48,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:46:48,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471954689] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:48,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:46:48,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 9 [2023-03-30 23:46:48,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839065763] [2023-03-30 23:46:48,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:48,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:46:48,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:48,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:46:48,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:46:48,686 INFO L87 Difference]: Start difference. First operand 21743 states and 24678 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:46:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:50,486 INFO L93 Difference]: Finished difference Result 43480 states and 49350 transitions. [2023-03-30 23:46:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 395 [2023-03-30 23:46:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:50,554 INFO L225 Difference]: With dead ends: 43480 [2023-03-30 23:46:50,554 INFO L226 Difference]: Without dead ends: 21743 [2023-03-30 23:46:50,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:46:50,674 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 737 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:50,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 946 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:46:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21743 states. [2023-03-30 23:46:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21743 to 20329. [2023-03-30 23:46:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20329 states, 19894 states have (on average 1.0521262692269027) internal successors, (20931), 20018 states have internal predecessors, (20931), 86 states have call successors, (86), 86 states have call predecessors, (86), 348 states have return successors, (1118), 224 states have call predecessors, (1118), 85 states have call successors, (1118) [2023-03-30 23:46:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20329 states to 20329 states and 22135 transitions. [2023-03-30 23:46:51,069 INFO L78 Accepts]: Start accepts. Automaton has 20329 states and 22135 transitions. Word has length 395 [2023-03-30 23:46:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:51,070 INFO L495 AbstractCegarLoop]: Abstraction has 20329 states and 22135 transitions. [2023-03-30 23:46:51,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:46:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 20329 states and 22135 transitions. [2023-03-30 23:46:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-03-30 23:46:51,080 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:51,080 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, 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, 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] [2023-03-30 23:46:51,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:51,286 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 [2023-03-30 23:46:51,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:51,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash -44467298, now seen corresponding path program 1 times [2023-03-30 23:46:51,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:51,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855072531] [2023-03-30 23:46:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:51,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:51,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:51,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:51,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:51,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2023-03-30 23:46:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-03-30 23:46:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855072531] [2023-03-30 23:46:52,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855072531] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944113897] [2023-03-30 23:46:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:52,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:52,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:52,091 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:52,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:46:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:52,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:52,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:52,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:52,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944113897] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:52,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:52,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:46:52,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238193598] [2023-03-30 23:46:52,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:52,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:46:52,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:46:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:46:52,767 INFO L87 Difference]: Start difference. First operand 20329 states and 22135 transitions. Second operand has 12 states, 12 states have (on average 39.833333333333336) internal successors, (478), 10 states have internal predecessors, (478), 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) [2023-03-30 23:46:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:58,934 INFO L93 Difference]: Finished difference Result 46454 states and 51175 transitions. [2023-03-30 23:46:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 23:46:58,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 39.833333333333336) internal successors, (478), 10 states have internal predecessors, (478), 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 459 [2023-03-30 23:46:58,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:58,997 INFO L225 Difference]: With dead ends: 46454 [2023-03-30 23:46:58,998 INFO L226 Difference]: Without dead ends: 23993 [2023-03-30 23:46:59,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 932 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2023-03-30 23:46:59,021 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3701 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 8903 mSolverCounterSat, 1034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3701 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 9937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 8903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:59,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3701 Valid, 211 Invalid, 9937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1034 Valid, 8903 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-03-30 23:46:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23993 states. [2023-03-30 23:46:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23993 to 23939. [2023-03-30 23:46:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23939 states, 23434 states have (on average 1.0516343774003585) internal successors, (24644), 23578 states have internal predecessors, (24644), 101 states have call successors, (101), 101 states have call predecessors, (101), 403 states have return successors, (1391), 259 states have call predecessors, (1391), 100 states have call successors, (1391) [2023-03-30 23:46:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23939 states to 23939 states and 26136 transitions. [2023-03-30 23:46:59,396 INFO L78 Accepts]: Start accepts. Automaton has 23939 states and 26136 transitions. Word has length 459 [2023-03-30 23:46:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:59,397 INFO L495 AbstractCegarLoop]: Abstraction has 23939 states and 26136 transitions. [2023-03-30 23:46:59,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 39.833333333333336) internal successors, (478), 10 states have internal predecessors, (478), 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) [2023-03-30 23:46:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 23939 states and 26136 transitions. [2023-03-30 23:46:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-03-30 23:46:59,408 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:59,408 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:46:59,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:59,617 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 [2023-03-30 23:46:59,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:59,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash 971788478, now seen corresponding path program 1 times [2023-03-30 23:46:59,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:59,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988558769] [2023-03-30 23:46:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:59,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:59,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:59,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:59,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:00,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2023-03-30 23:47:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-03-30 23:47:00,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:47:00,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988558769] [2023-03-30 23:47:00,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988558769] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:47:00,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518711806] [2023-03-30 23:47:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:47:00,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:47:00,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:47:00,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:47:00,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:47:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:00,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:47:00,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:47:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:47:00,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:47:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:47:00,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518711806] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:47:00,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:47:00,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:47:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059141733] [2023-03-30 23:47:00,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:47:00,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:47:00,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:47:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:47:00,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:47:00,608 INFO L87 Difference]: Start difference. First operand 23939 states and 26136 transitions. Second operand has 11 states, 11 states have (on average 36.27272727272727) internal successors, (399), 9 states have internal predecessors, (399), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)