/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:56:44,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:56:44,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:56:44,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:56:44,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:56:44,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:56:44,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:56:44,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:56:44,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:56:44,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:56:44,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:56:44,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:56:44,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:56:44,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:56:44,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:56:44,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:56:44,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:56:44,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:56:44,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:56:44,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:56:44,666 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:56:44,690 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:56:44,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:56:44,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:56:44,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:56:44,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:56:44,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:56:44,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:56:44,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:56:44,692 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:56:44,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:56:44,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:56:44,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:56:44,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:56:44,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:56:44,695 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:56:44,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:56:44,695 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:56:44,695 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:56:44,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:56:44,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:56:44,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:56:44,903 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:56:44,904 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:56:44,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label29.c [2023-04-01 23:56:45,957 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:56:46,379 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:56:46,379 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label29.c [2023-04-01 23:56:46,417 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0f98143d/242e8e7067de4bb0959f51e49f4198d4/FLAGcc1f1a4f8 [2023-04-01 23:56:46,555 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0f98143d/242e8e7067de4bb0959f51e49f4198d4 [2023-04-01 23:56:46,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:56:46,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:56:46,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:56:46,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:56:46,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:56:46,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:56:46" (1/1) ... [2023-04-01 23:56:46,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cda8f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:46, skipping insertion in model container [2023-04-01 23:56:46,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:56:46" (1/1) ... [2023-04-01 23:56:46,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:56:46,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:56:46,916 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label29.c[3135,3148] [2023-04-01 23:56:47,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:56:47,796 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:56:47,817 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label29.c[3135,3148] [2023-04-01 23:56:48,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:56:48,474 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:56:48,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48 WrapperNode [2023-04-01 23:56:48,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:56:48,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:56:48,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:56:48,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:56:48,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:48,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:48,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:48,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:48,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:48,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:48,916 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:48,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:48,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:56:48,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:56:48,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:56:48,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:56:49,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (1/1) ... [2023-04-01 23:56:49,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:56:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:56:49,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:56:49,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:56:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:56:49,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:56:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:56:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:56:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:56:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:56:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:56:49,180 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:56:49,181 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:56:54,834 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:56:54,849 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:56:54,849 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:56:54,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:56:54 BoogieIcfgContainer [2023-04-01 23:56:54,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:56:54,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:56:54,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:56:54,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:56:54,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:56:46" (1/3) ... [2023-04-01 23:56:54,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd8c783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:56:54, skipping insertion in model container [2023-04-01 23:56:54,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:48" (2/3) ... [2023-04-01 23:56:54,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd8c783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:56:54, skipping insertion in model container [2023-04-01 23:56:54,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:56:54" (3/3) ... [2023-04-01 23:56:54,859 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label29.c [2023-04-01 23:56:54,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:56:54,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:56:54,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:56:54,951 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;@3d6d4cb4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:56:54,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:56:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 23:56:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 23:56:54,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:54,965 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] [2023-04-01 23:56:54,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:54,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2072502048, now seen corresponding path program 1 times [2023-04-01 23:56:54,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:54,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314248023] [2023-04-01 23:56:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:54,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:55,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:56:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:56:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314248023] [2023-04-01 23:56:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314248023] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:56:55,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:56:55,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:56:55,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538536176] [2023-04-01 23:56:55,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:56:55,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:56:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:56:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:56:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:56:55,492 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:57:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:07,831 INFO L93 Difference]: Finished difference Result 6483 states and 12306 transitions. [2023-04-01 23:57:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:57:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 27 [2023-04-01 23:57:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:07,863 INFO L225 Difference]: With dead ends: 6483 [2023-04-01 23:57:07,863 INFO L226 Difference]: Without dead ends: 4638 [2023-04-01 23:57:07,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:57:07,875 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 7935 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 9147 mSolverCounterSat, 3639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7935 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 12786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3639 IncrementalHoareTripleChecker+Valid, 9147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:07,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7935 Valid, 495 Invalid, 12786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3639 Valid, 9147 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-04-01 23:57:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4638 states. [2023-04-01 23:57:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4638 to 4629. [2023-04-01 23:57:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4571 states have (on average 1.6764384161015096) internal successors, (7663), 4574 states have internal predecessors, (7663), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-04-01 23:57:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7760 transitions. [2023-04-01 23:57:08,086 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7760 transitions. Word has length 27 [2023-04-01 23:57:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:08,088 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 7760 transitions. [2023-04-01 23:57:08,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:57:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7760 transitions. [2023-04-01 23:57:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 23:57:08,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:08,095 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 23:57:08,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:57:08,096 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:08,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:08,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1420420280, now seen corresponding path program 1 times [2023-04-01 23:57:08,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:08,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623080939] [2023-04-01 23:57:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:08,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:08,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:08,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:57:08,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:08,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623080939] [2023-04-01 23:57:08,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623080939] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:57:08,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:57:08,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:57:08,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332219049] [2023-04-01 23:57:08,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:57:08,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:57:08,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:08,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:57:08,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:57:08,602 INFO L87 Difference]: Start difference. First operand 4629 states and 7760 transitions. Second operand has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:57:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:18,798 INFO L93 Difference]: Finished difference Result 13837 states and 23541 transitions. [2023-04-01 23:57:18,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:57:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 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 116 [2023-04-01 23:57:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:18,836 INFO L225 Difference]: With dead ends: 13837 [2023-04-01 23:57:18,836 INFO L226 Difference]: Without dead ends: 9214 [2023-04-01 23:57:18,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:57:18,849 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 8094 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 9996 mSolverCounterSat, 2127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8094 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 12123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2127 IncrementalHoareTripleChecker+Valid, 9996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:18,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8094 Valid, 897 Invalid, 12123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2127 Valid, 9996 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2023-04-01 23:57:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2023-04-01 23:57:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 9059. [2023-04-01 23:57:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9059 states, 8892 states have (on average 1.4507422402159245) internal successors, (12900), 8909 states have internal predecessors, (12900), 38 states have call successors, (38), 38 states have call predecessors, (38), 128 states have return successors, (405), 111 states have call predecessors, (405), 37 states have call successors, (405) [2023-04-01 23:57:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9059 states to 9059 states and 13343 transitions. [2023-04-01 23:57:19,023 INFO L78 Accepts]: Start accepts. Automaton has 9059 states and 13343 transitions. Word has length 116 [2023-04-01 23:57:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:19,024 INFO L495 AbstractCegarLoop]: Abstraction has 9059 states and 13343 transitions. [2023-04-01 23:57:19,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:57:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 9059 states and 13343 transitions. [2023-04-01 23:57:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 23:57:19,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:19,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:57:19,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:57:19,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:19,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1216293835, now seen corresponding path program 1 times [2023-04-01 23:57:19,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:19,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042995625] [2023-04-01 23:57:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:19,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:19,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:19,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:57:19,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:19,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042995625] [2023-04-01 23:57:19,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042995625] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:57:19,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:57:19,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:57:19,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812961873] [2023-04-01 23:57:19,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:57:19,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:57:19,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:57:19,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:57:19,435 INFO L87 Difference]: Start difference. First operand 9059 states and 13343 transitions. Second operand has 7 states, 6 states have (on average 25.833333333333332) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:57:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:29,780 INFO L93 Difference]: Finished difference Result 27892 states and 42475 transitions. [2023-04-01 23:57:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:57:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 25.833333333333332) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-01 23:57:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:29,837 INFO L225 Difference]: With dead ends: 27892 [2023-04-01 23:57:29,837 INFO L226 Difference]: Without dead ends: 18839 [2023-04-01 23:57:29,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:57:29,861 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 11592 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 9609 mSolverCounterSat, 2149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11592 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 11758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2149 IncrementalHoareTripleChecker+Valid, 9609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:29,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11592 Valid, 997 Invalid, 11758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2149 Valid, 9609 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2023-04-01 23:57:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18839 states. [2023-04-01 23:57:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18839 to 18417. [2023-04-01 23:57:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18417 states, 17885 states have (on average 1.2922560805143974) internal successors, (23112), 17964 states have internal predecessors, (23112), 74 states have call successors, (74), 74 states have call predecessors, (74), 457 states have return successors, (1799), 378 states have call predecessors, (1799), 73 states have call successors, (1799) [2023-04-01 23:57:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18417 states to 18417 states and 24985 transitions. [2023-04-01 23:57:30,199 INFO L78 Accepts]: Start accepts. Automaton has 18417 states and 24985 transitions. Word has length 161 [2023-04-01 23:57:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:30,199 INFO L495 AbstractCegarLoop]: Abstraction has 18417 states and 24985 transitions. [2023-04-01 23:57:30,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 25.833333333333332) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:57:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 18417 states and 24985 transitions. [2023-04-01 23:57:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-04-01 23:57:30,201 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:30,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:57:30,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:57:30,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:30,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1016324044, now seen corresponding path program 1 times [2023-04-01 23:57:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683878169] [2023-04-01 23:57:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:30,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:30,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:30,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:30,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-04-01 23:57:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:57:30,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:30,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683878169] [2023-04-01 23:57:30,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683878169] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:57:30,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498785923] [2023-04-01 23:57:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:30,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:30,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:57:30,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:57:30,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:57:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:30,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:57:30,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:57:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 23:57:30,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:57:30,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498785923] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:57:30,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:57:30,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-04-01 23:57:30,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836944155] [2023-04-01 23:57:30,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:57:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:57:30,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:57:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:57:30,730 INFO L87 Difference]: Start difference. First operand 18417 states and 24985 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:57:38,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:38,754 INFO L93 Difference]: Finished difference Result 55851 states and 78306 transitions. [2023-04-01 23:57:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:57:38,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 180 [2023-04-01 23:57:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:38,849 INFO L225 Difference]: With dead ends: 55851 [2023-04-01 23:57:38,849 INFO L226 Difference]: Without dead ends: 37440 [2023-04-01 23:57:38,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:57:38,892 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 8211 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 8101 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8211 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 9109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 8101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:38,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8211 Valid, 941 Invalid, 9109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 8101 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-04-01 23:57:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37440 states. [2023-04-01 23:57:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37440 to 32598. [2023-04-01 23:57:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32598 states, 31421 states have (on average 1.2786353075968302) internal successors, (40176), 31627 states have internal predecessors, (40176), 128 states have call successors, (128), 128 states have call predecessors, (128), 1048 states have return successors, (4196), 842 states have call predecessors, (4196), 127 states have call successors, (4196) [2023-04-01 23:57:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32598 states to 32598 states and 44500 transitions. [2023-04-01 23:57:39,604 INFO L78 Accepts]: Start accepts. Automaton has 32598 states and 44500 transitions. Word has length 180 [2023-04-01 23:57:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:39,605 INFO L495 AbstractCegarLoop]: Abstraction has 32598 states and 44500 transitions. [2023-04-01 23:57:39,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:57:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32598 states and 44500 transitions. [2023-04-01 23:57:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-04-01 23:57:39,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:39,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:57:39,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 23:57:39,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:39,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:39,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:39,818 INFO L85 PathProgramCache]: Analyzing trace with hash 22126298, now seen corresponding path program 1 times [2023-04-01 23:57:39,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:39,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213190328] [2023-04-01 23:57:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:39,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:39,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:39,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 23:57:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 40 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:57:40,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213190328] [2023-04-01 23:57:40,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213190328] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:57:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225406936] [2023-04-01 23:57:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:40,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:57:40,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:57:40,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:57:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:40,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:57:40,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:57:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 23:57:40,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:57:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225406936] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:57:40,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:57:40,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:57:40,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276808420] [2023-04-01 23:57:40,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:57:40,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:57:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:57:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:57:40,335 INFO L87 Difference]: Start difference. First operand 32598 states and 44500 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:57:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:49,162 INFO L93 Difference]: Finished difference Result 98970 states and 145136 transitions. [2023-04-01 23:57:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:57:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 196 [2023-04-01 23:57:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:49,444 INFO L225 Difference]: With dead ends: 98970 [2023-04-01 23:57:49,444 INFO L226 Difference]: Without dead ends: 66378 [2023-04-01 23:57:49,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:57:49,481 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 4828 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 8381 mSolverCounterSat, 3378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4828 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 11759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3378 IncrementalHoareTripleChecker+Valid, 8381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:49,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4828 Valid, 1202 Invalid, 11759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3378 Valid, 8381 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 23:57:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66378 states. [2023-04-01 23:57:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66378 to 64908. [2023-04-01 23:57:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64908 states, 62345 states have (on average 1.2267864303472613) internal successors, (76484), 62835 states have internal predecessors, (76484), 254 states have call successors, (254), 254 states have call predecessors, (254), 2308 states have return successors, (13019), 1818 states have call predecessors, (13019), 253 states have call successors, (13019) [2023-04-01 23:57:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64908 states to 64908 states and 89757 transitions. [2023-04-01 23:57:50,834 INFO L78 Accepts]: Start accepts. Automaton has 64908 states and 89757 transitions. Word has length 196 [2023-04-01 23:57:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:50,834 INFO L495 AbstractCegarLoop]: Abstraction has 64908 states and 89757 transitions. [2023-04-01 23:57:50,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:57:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 64908 states and 89757 transitions. [2023-04-01 23:57:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2023-04-01 23:57:50,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:50,838 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:57:50,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 23:57:51,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:51,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:51,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash -373069588, now seen corresponding path program 1 times [2023-04-01 23:57:51,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:51,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881970287] [2023-04-01 23:57:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:51,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:51,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:51,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:51,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2023-04-01 23:57:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:51,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 329 [2023-04-01 23:57:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 159 proven. 68 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 23:57:51,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:51,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881970287] [2023-04-01 23:57:51,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881970287] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:57:51,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365306315] [2023-04-01 23:57:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:51,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:51,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:57:51,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:57:51,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:57:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:51,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:57:51,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:57:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 273 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 23:57:51,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:57:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 160 proven. 69 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-01 23:57:52,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365306315] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:57:52,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:57:52,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:57:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928418275] [2023-04-01 23:57:52,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:57:52,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:57:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:57:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:57:52,307 INFO L87 Difference]: Start difference. First operand 64908 states and 89757 transitions. Second operand has 12 states, 12 states have (on average 49.25) internal successors, (591), 10 states have internal predecessors, (591), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:58:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:58:27,866 INFO L93 Difference]: Finished difference Result 261116 states and 438700 transitions. [2023-04-01 23:58:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-04-01 23:58:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 49.25) internal successors, (591), 10 states have internal predecessors, (591), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 419 [2023-04-01 23:58:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:58:28,558 INFO L225 Difference]: With dead ends: 261116 [2023-04-01 23:58:28,558 INFO L226 Difference]: Without dead ends: 185973 [2023-04-01 23:58:28,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 898 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=814, Invalid=4298, Unknown=0, NotChecked=0, Total=5112 [2023-04-01 23:58:28,686 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 16786 mSDsluCounter, 2423 mSDsCounter, 0 mSdLazyCounter, 52632 mSolverCounterSat, 4836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16790 SdHoareTripleChecker+Valid, 2943 SdHoareTripleChecker+Invalid, 57468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4836 IncrementalHoareTripleChecker+Valid, 52632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:58:28,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16790 Valid, 2943 Invalid, 57468 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4836 Valid, 52632 Invalid, 0 Unknown, 0 Unchecked, 31.7s Time] [2023-04-01 23:58:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185973 states. [2023-04-01 23:58:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185973 to 180035. [2023-04-01 23:58:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180035 states, 173615 states have (on average 1.1465426374449212) internal successors, (199057), 174873 states have internal predecessors, (199057), 827 states have call successors, (827), 716 states have call predecessors, (827), 5592 states have return successors, (58198), 4445 states have call predecessors, (58198), 826 states have call successors, (58198) [2023-04-01 23:58:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180035 states to 180035 states and 258082 transitions. [2023-04-01 23:58:33,548 INFO L78 Accepts]: Start accepts. Automaton has 180035 states and 258082 transitions. Word has length 419 [2023-04-01 23:58:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:58:33,549 INFO L495 AbstractCegarLoop]: Abstraction has 180035 states and 258082 transitions. [2023-04-01 23:58:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 49.25) internal successors, (591), 10 states have internal predecessors, (591), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:58:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 180035 states and 258082 transitions. [2023-04-01 23:58:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2023-04-01 23:58:33,579 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:58:33,579 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:58:33,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 23:58:33,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:58:33,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:58:33,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:58:33,790 INFO L85 PathProgramCache]: Analyzing trace with hash -905517535, now seen corresponding path program 1 times [2023-04-01 23:58:33,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:58:33,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182182632] [2023-04-01 23:58:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:58:33,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:58:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:34,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:58:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:34,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:58:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:35,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:58:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:35,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2023-04-01 23:58:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:35,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 680 [2023-04-01 23:58:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 225 proven. 68 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 23:58:35,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:58:35,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182182632] [2023-04-01 23:58:35,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182182632] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:58:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902680620] [2023-04-01 23:58:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:58:35,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:58:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:58:35,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:58:35,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:58:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:35,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:58:35,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:58:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 339 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 23:58:36,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:58:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 226 proven. 69 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-01 23:58:36,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902680620] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:58:36,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:58:36,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:58:36,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894739535] [2023-04-01 23:58:36,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:58:36,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:58:36,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:58:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:58:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:58:36,520 INFO L87 Difference]: Start difference. First operand 180035 states and 258082 transitions. Second operand has 11 states, 11 states have (on average 97.27272727272727) internal successors, (1070), 9 states have internal predecessors, (1070), 4 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 23:58:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:58:55,380 INFO L93 Difference]: Finished difference Result 368201 states and 535880 transitions. [2023-04-01 23:58:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:58:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 97.27272727272727) internal successors, (1070), 9 states have internal predecessors, (1070), 4 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 770 [2023-04-01 23:58:55,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:58:56,125 INFO L225 Difference]: With dead ends: 368201 [2023-04-01 23:58:56,126 INFO L226 Difference]: Without dead ends: 188196 [2023-04-01 23:58:56,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1575 GetRequests, 1554 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:58:56,310 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 6716 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 24171 mSolverCounterSat, 3415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6716 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 27586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3415 IncrementalHoareTripleChecker+Valid, 24171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:58:56,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6716 Valid, 1500 Invalid, 27586 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3415 Valid, 24171 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time] [2023-04-01 23:58:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188196 states. [2023-04-01 23:58:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188196 to 186885. [2023-04-01 23:58:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186885 states, 179529 states have (on average 1.1291100602131132) internal successors, (202708), 181016 states have internal predecessors, (202708), 848 states have call successors, (848), 734 states have call predecessors, (848), 6507 states have return successors, (55502), 5134 states have call predecessors, (55502), 847 states have call successors, (55502) [2023-04-01 23:59:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186885 states to 186885 states and 259058 transitions. [2023-04-01 23:59:00,716 INFO L78 Accepts]: Start accepts. Automaton has 186885 states and 259058 transitions. Word has length 770 [2023-04-01 23:59:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:59:00,722 INFO L495 AbstractCegarLoop]: Abstraction has 186885 states and 259058 transitions. [2023-04-01 23:59:00,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 97.27272727272727) internal successors, (1070), 9 states have internal predecessors, (1070), 4 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 23:59:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 186885 states and 259058 transitions. [2023-04-01 23:59:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-04-01 23:59:00,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:59:00,731 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:59:00,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 23:59:00,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:59:00,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:59:00,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:59:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1520522097, now seen corresponding path program 1 times [2023-04-01 23:59:00,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:59:00,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248693941] [2023-04-01 23:59:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:00,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:59:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:01,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:59:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:01,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:59:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:01,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:59:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:01,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:59:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:01,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:59:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2023-04-01 23:59:01,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:59:01,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248693941] [2023-04-01 23:59:01,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248693941] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:59:01,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288321827] [2023-04-01 23:59:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:01,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:59:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:59:01,950 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:59:01,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:59:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:02,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:59:02,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:59:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-01 23:59:02,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:59:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-01 23:59:02,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288321827] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:59:02,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:59:02,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-04-01 23:59:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619260723] [2023-04-01 23:59:02,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:59:02,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:59:02,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:59:02,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:59:02,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:59:02,662 INFO L87 Difference]: Start difference. First operand 186885 states and 259058 transitions. Second operand has 12 states, 12 states have (on average 60.333333333333336) internal successors, (724), 10 states have internal predecessors, (724), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 23:59:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:59:48,195 INFO L93 Difference]: Finished difference Result 952671 states and 1579196 transitions. [2023-04-01 23:59:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 23:59:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 60.333333333333336) internal successors, (724), 10 states have internal predecessors, (724), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 827 [2023-04-01 23:59:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:59:53,368 INFO L225 Difference]: With dead ends: 952671 [2023-04-01 23:59:53,369 INFO L226 Difference]: Without dead ends: 765800 [2023-04-01 23:59:53,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1742 GetRequests, 1693 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1914, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 23:59:53,921 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 28596 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 36759 mSolverCounterSat, 12051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28596 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 48810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12051 IncrementalHoareTripleChecker+Valid, 36759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:59:53,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28596 Valid, 1756 Invalid, 48810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12051 Valid, 36759 Invalid, 0 Unknown, 0 Unchecked, 34.0s Time] [2023-04-01 23:59:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765800 states. [2023-04-02 00:00:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765800 to 731742. [2023-04-02 00:00:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731742 states, 715337 states have (on average 1.1399032903372817) internal successors, (815415), 717939 states have internal predecessors, (815415), 3495 states have call successors, (3495), 3032 states have call predecessors, (3495), 12909 states have return successors, (297615), 10770 states have call predecessors, (297615), 3494 states have call successors, (297615) [2023-04-02 00:00:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731742 states to 731742 states and 1116525 transitions. [2023-04-02 00:00:18,514 INFO L78 Accepts]: Start accepts. Automaton has 731742 states and 1116525 transitions. Word has length 827 [2023-04-02 00:00:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:00:18,515 INFO L495 AbstractCegarLoop]: Abstraction has 731742 states and 1116525 transitions. [2023-04-02 00:00:18,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.333333333333336) internal successors, (724), 10 states have internal predecessors, (724), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 00:00:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 731742 states and 1116525 transitions. [2023-04-02 00:00:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2023-04-02 00:00:18,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:00:18,532 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:00:18,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 00:00:18,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:00:18,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:00:18,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:00:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1827098354, now seen corresponding path program 1 times [2023-04-02 00:00:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:00:18,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869807725] [2023-04-02 00:00:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:00:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:00:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:19,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:00:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:19,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:00:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:19,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-02 00:00:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:20,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:00:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:20,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-02 00:00:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:20,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 845 [2023-04-02 00:00:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:20,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1009 [2023-04-02 00:00:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 415 proven. 68 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-04-02 00:00:20,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:00:20,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869807725] [2023-04-02 00:00:20,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869807725] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:00:20,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766494603] [2023-04-02 00:00:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:00:20,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:00:20,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:00:20,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:00:20,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 00:00:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:20,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:00:20,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:00:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 595 proven. 2 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-04-02 00:00:21,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:00:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 417 proven. 69 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-04-02 00:00:21,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766494603] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:00:21,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:00:21,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-02 00:00:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754315696] [2023-04-02 00:00:21,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:00:21,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:00:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:00:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:00:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:00:21,701 INFO L87 Difference]: Start difference. First operand 731742 states and 1116525 transitions. Second operand has 12 states, 12 states have (on average 100.0) internal successors, (1200), 10 states have internal predecessors, (1200), 5 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16)