/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/Problem12_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:20:34,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:20:34,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:20:34,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:20:34,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:20:34,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:20:34,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:20:34,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:20:34,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:20:34,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:20:34,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:20:34,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:20:34,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:20:34,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:20:34,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:20:34,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:20:34,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:20:34,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:20:34,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:20:35,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:20:35,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:20:35,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:20:35,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:20:35,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:20:35,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:20:35,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:20:35,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:20:35,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:20:35,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:20:35,059 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:20:35,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:20:35,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:20:35,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:20:35,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:20:35,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:20:35,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:20:35,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:20:35,061 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:20:35,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:20:35,062 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:20:35,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:20:35,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:20:35,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:20:35,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:20:35,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:20:35,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:20:35,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:20:35,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:20:35,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:20:35,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:20:35,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:20:35,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:20:35,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:20:35,065 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:20:35,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:20:35,066 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:20:35,066 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:20:35,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:20:35,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:20:35,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:20:35,311 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:20:35,312 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:20:35,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2023-03-30 23:20:36,493 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:20:36,945 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:20:36,945 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2023-03-30 23:20:36,972 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb00855e/2ed84b5e39bc41d58113f8d0a0030a29/FLAG280701146 [2023-03-30 23:20:36,987 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb00855e/2ed84b5e39bc41d58113f8d0a0030a29 [2023-03-30 23:20:36,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:20:36,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:20:36,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:20:36,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:20:36,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:20:36,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:20:36" (1/1) ... [2023-03-30 23:20:36,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ab4104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:36, skipping insertion in model container [2023-03-30 23:20:36,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:20:36" (1/1) ... [2023-03-30 23:20:37,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:20:37,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:20:37,339 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/Problem12_label30.c[3429,3442] [2023-03-30 23:20:37,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:20:38,000 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:20:38,029 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/Problem12_label30.c[3429,3442] [2023-03-30 23:20:38,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:20:38,484 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:20:38,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38 WrapperNode [2023-03-30 23:20:38,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:20:38,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:20:38,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:20:38,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:20:38,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,681 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:20:38,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:20:38,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:20:38,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:20:38,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (1/1) ... [2023-03-30 23:20:38,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:20:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:20:38,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:20:38,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:20:38,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:20:38,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:20:38,806 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:20:38,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:20:38,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:20:38,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:20:38,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:20:38,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:20:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:20:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:20:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:20:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:20:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:20:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:20:38,919 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:20:38,921 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:20:42,748 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:20:42,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:20:42,766 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:20:42,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:20:42 BoogieIcfgContainer [2023-03-30 23:20:42,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:20:42,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:20:42,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:20:42,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:20:42,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:20:36" (1/3) ... [2023-03-30 23:20:42,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c67365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:20:42, skipping insertion in model container [2023-03-30 23:20:42,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:38" (2/3) ... [2023-03-30 23:20:42,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c67365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:20:42, skipping insertion in model container [2023-03-30 23:20:42,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:20:42" (3/3) ... [2023-03-30 23:20:42,780 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label30.c [2023-03-30 23:20:42,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:20:42,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:20:42,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:20:42,880 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;@330bd411, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:20:42,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:20:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:20:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-30 23:20:42,898 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:42,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:42,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:42,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash -245804040, now seen corresponding path program 1 times [2023-03-30 23:20:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:42,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487325722] [2023-03-30 23:20:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:43,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487325722] [2023-03-30 23:20:43,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487325722] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:43,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:20:43,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:20:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145520990] [2023-03-30 23:20:43,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:43,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:20:43,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:20:43,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:20:43,415 INFO L87 Difference]: Start difference. First operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:20:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:20:48,731 INFO L93 Difference]: Finished difference Result 2487 states and 4748 transitions. [2023-03-30 23:20:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:20:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 31 [2023-03-30 23:20:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:20:48,755 INFO L225 Difference]: With dead ends: 2487 [2023-03-30 23:20:48,755 INFO L226 Difference]: Without dead ends: 1568 [2023-03-30 23:20:48,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:20:48,770 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2421 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2421 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:20:48,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2421 Valid, 39 Invalid, 4309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 3593 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-03-30 23:20:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2023-03-30 23:20:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1564. [2023-03-30 23:20:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1536 states have (on average 1.5944010416666667) internal successors, (2449), 1538 states have internal predecessors, (2449), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-03-30 23:20:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2484 transitions. [2023-03-30 23:20:48,891 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2484 transitions. Word has length 31 [2023-03-30 23:20:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:20:48,892 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2484 transitions. [2023-03-30 23:20:48,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:20:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2484 transitions. [2023-03-30 23:20:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-30 23:20:48,897 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:48,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:48,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:20:48,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:48,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:48,899 INFO L85 PathProgramCache]: Analyzing trace with hash 482938695, now seen corresponding path program 1 times [2023-03-30 23:20:48,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:48,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115782953] [2023-03-30 23:20:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:48,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:49,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:49,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:20:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:49,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:49,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115782953] [2023-03-30 23:20:49,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115782953] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:49,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:20:49,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:20:49,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352604660] [2023-03-30 23:20:49,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:49,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:20:49,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:20:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:20:49,456 INFO L87 Difference]: Start difference. First operand 1564 states and 2484 transitions. Second operand has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:20:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:20:55,540 INFO L93 Difference]: Finished difference Result 4768 states and 7606 transitions. [2023-03-30 23:20:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 23:20:55,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2023-03-30 23:20:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:20:55,564 INFO L225 Difference]: With dead ends: 4768 [2023-03-30 23:20:55,565 INFO L226 Difference]: Without dead ends: 3210 [2023-03-30 23:20:55,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:20:55,582 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4518 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 5718 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4518 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 6667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 5718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:20:55,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4518 Valid, 112 Invalid, 6667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 5718 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-30 23:20:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2023-03-30 23:20:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3163. [2023-03-30 23:20:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3095 states have (on average 1.4465266558966074) internal successors, (4477), 3104 states have internal predecessors, (4477), 18 states have call successors, (18), 18 states have call predecessors, (18), 49 states have return successors, (91), 40 states have call predecessors, (91), 17 states have call successors, (91) [2023-03-30 23:20:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 4586 transitions. [2023-03-30 23:20:55,694 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 4586 transitions. Word has length 110 [2023-03-30 23:20:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:20:55,695 INFO L495 AbstractCegarLoop]: Abstraction has 3163 states and 4586 transitions. [2023-03-30 23:20:55,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:20:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 4586 transitions. [2023-03-30 23:20:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-03-30 23:20:55,705 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:55,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:55,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:20:55,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:55,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:55,707 INFO L85 PathProgramCache]: Analyzing trace with hash 648129616, now seen corresponding path program 1 times [2023-03-30 23:20:55,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:55,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367992626] [2023-03-30 23:20:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:55,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:56,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:20:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:56,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367992626] [2023-03-30 23:20:56,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367992626] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:56,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:20:56,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:20:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816398403] [2023-03-30 23:20:56,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:56,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:20:56,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:56,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:20:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:20:56,200 INFO L87 Difference]: Start difference. First operand 3163 states and 4586 transitions. Second operand has 8 states, 7 states have (on average 19.0) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:21:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:03,365 INFO L93 Difference]: Finished difference Result 12865 states and 19113 transitions. [2023-03-30 23:21:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:21:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 19.0) internal successors, (133), 5 states have internal predecessors, (133), 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 139 [2023-03-30 23:21:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:03,406 INFO L225 Difference]: With dead ends: 12865 [2023-03-30 23:21:03,406 INFO L226 Difference]: Without dead ends: 9708 [2023-03-30 23:21:03,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:21:03,416 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6074 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6720 mSolverCounterSat, 2491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6074 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 9211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2491 IncrementalHoareTripleChecker+Valid, 6720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:03,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6074 Valid, 143 Invalid, 9211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2491 Valid, 6720 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-03-30 23:21:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9708 states. [2023-03-30 23:21:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9708 to 9631. [2023-03-30 23:21:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9631 states, 9375 states have (on average 1.30208) internal successors, (12207), 9424 states have internal predecessors, (12207), 50 states have call successors, (50), 50 states have call predecessors, (50), 205 states have return successors, (652), 156 states have call predecessors, (652), 49 states have call successors, (652) [2023-03-30 23:21:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9631 states to 9631 states and 12909 transitions. [2023-03-30 23:21:03,657 INFO L78 Accepts]: Start accepts. Automaton has 9631 states and 12909 transitions. Word has length 139 [2023-03-30 23:21:03,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:03,657 INFO L495 AbstractCegarLoop]: Abstraction has 9631 states and 12909 transitions. [2023-03-30 23:21:03,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 19.0) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:21:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 9631 states and 12909 transitions. [2023-03-30 23:21:03,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-03-30 23:21:03,659 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:03,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:03,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:21:03,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:03,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1125685227, now seen corresponding path program 1 times [2023-03-30 23:21:03,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:03,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746417762] [2023-03-30 23:21:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:03,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:03,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:03,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:03,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:03,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746417762] [2023-03-30 23:21:03,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746417762] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:03,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941324521] [2023-03-30 23:21:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:03,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:03,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:03,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:03,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:21:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:04,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:04,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:04,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:04,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941324521] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:04,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:04,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:21:04,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899105378] [2023-03-30 23:21:04,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:04,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:04,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:04,196 INFO L87 Difference]: Start difference. First operand 9631 states and 12909 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:07,621 INFO L93 Difference]: Finished difference Result 28732 states and 39610 transitions. [2023-03-30 23:21:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 176 [2023-03-30 23:21:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:07,692 INFO L225 Difference]: With dead ends: 28732 [2023-03-30 23:21:07,693 INFO L226 Difference]: Without dead ends: 19107 [2023-03-30 23:21:07,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:07,723 INFO L413 NwaCegarLoop]: 1475 mSDtfsCounter, 741 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2844 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:07,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1507 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2844 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:21:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19107 states. [2023-03-30 23:21:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19107 to 18340. [2023-03-30 23:21:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18340 states, 17893 states have (on average 1.2712792712233834) internal successors, (22747), 17979 states have internal predecessors, (22747), 94 states have call successors, (94), 94 states have call predecessors, (94), 352 states have return successors, (1882), 266 states have call predecessors, (1882), 93 states have call successors, (1882) [2023-03-30 23:21:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18340 states to 18340 states and 24723 transitions. [2023-03-30 23:21:08,170 INFO L78 Accepts]: Start accepts. Automaton has 18340 states and 24723 transitions. Word has length 176 [2023-03-30 23:21:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:08,171 INFO L495 AbstractCegarLoop]: Abstraction has 18340 states and 24723 transitions. [2023-03-30 23:21:08,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 18340 states and 24723 transitions. [2023-03-30 23:21:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-03-30 23:21:08,176 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:08,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:08,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:08,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:08,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1070607328, now seen corresponding path program 1 times [2023-03-30 23:21:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:08,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370154523] [2023-03-30 23:21:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:08,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:08,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:08,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370154523] [2023-03-30 23:21:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370154523] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144440112] [2023-03-30 23:21:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:08,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:08,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:08,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:21:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:08,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:08,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:08,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:08,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144440112] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:08,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:08,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:21:08,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33885376] [2023-03-30 23:21:08,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:08,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:08,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:08,950 INFO L87 Difference]: Start difference. First operand 18340 states and 24723 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:12,038 INFO L93 Difference]: Finished difference Result 52301 states and 72735 transitions. [2023-03-30 23:21:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 179 [2023-03-30 23:21:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:12,244 INFO L225 Difference]: With dead ends: 52301 [2023-03-30 23:21:12,245 INFO L226 Difference]: Without dead ends: 33967 [2023-03-30 23:21:12,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:12,286 INFO L413 NwaCegarLoop]: 1333 mSDtfsCounter, 812 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:12,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1365 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-30 23:21:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33967 states. [2023-03-30 23:21:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33967 to 33200. [2023-03-30 23:21:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33200 states, 32491 states have (on average 1.2020251762026408) internal successors, (39055), 32620 states have internal predecessors, (39055), 170 states have call successors, (170), 170 states have call predecessors, (170), 538 states have return successors, (3937), 409 states have call predecessors, (3937), 169 states have call successors, (3937) [2023-03-30 23:21:13,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33200 states to 33200 states and 43162 transitions. [2023-03-30 23:21:13,036 INFO L78 Accepts]: Start accepts. Automaton has 33200 states and 43162 transitions. Word has length 179 [2023-03-30 23:21:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:13,037 INFO L495 AbstractCegarLoop]: Abstraction has 33200 states and 43162 transitions. [2023-03-30 23:21:13,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 33200 states and 43162 transitions. [2023-03-30 23:21:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-03-30 23:21:13,039 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:13,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:13,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:13,251 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:13,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1968289843, now seen corresponding path program 1 times [2023-03-30 23:21:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74108607] [2023-03-30 23:21:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:13,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74108607] [2023-03-30 23:21:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74108607] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533146449] [2023-03-30 23:21:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:13,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:13,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:13,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:21:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:13,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:13,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:13,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533146449] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:13,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:13,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:21:13,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12526737] [2023-03-30 23:21:13,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:13,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:13,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:13,645 INFO L87 Difference]: Start difference. First operand 33200 states and 43162 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:17,335 INFO L93 Difference]: Finished difference Result 82781 states and 110282 transitions. [2023-03-30 23:21:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 180 [2023-03-30 23:21:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:17,506 INFO L225 Difference]: With dead ends: 82781 [2023-03-30 23:21:17,507 INFO L226 Difference]: Without dead ends: 49587 [2023-03-30 23:21:17,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:17,562 INFO L413 NwaCegarLoop]: 1388 mSDtfsCounter, 751 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:17,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 1420 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:21:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49587 states. [2023-03-30 23:21:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49587 to 47286. [2023-03-30 23:21:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47286 states, 46325 states have (on average 1.1988127361036158) internal successors, (55535), 46498 states have internal predecessors, (55535), 242 states have call successors, (242), 242 states have call predecessors, (242), 718 states have return successors, (6912), 545 states have call predecessors, (6912), 241 states have call successors, (6912) [2023-03-30 23:21:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47286 states to 47286 states and 62689 transitions. [2023-03-30 23:21:18,614 INFO L78 Accepts]: Start accepts. Automaton has 47286 states and 62689 transitions. Word has length 180 [2023-03-30 23:21:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:18,614 INFO L495 AbstractCegarLoop]: Abstraction has 47286 states and 62689 transitions. [2023-03-30 23:21:18,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 47286 states and 62689 transitions. [2023-03-30 23:21:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-03-30 23:21:18,618 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:18,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:18,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:18,829 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:18,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1338646451, now seen corresponding path program 1 times [2023-03-30 23:21:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843290875] [2023-03-30 23:21:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:18,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:19,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:19,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:21:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-03-30 23:21:19,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:19,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843290875] [2023-03-30 23:21:19,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843290875] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:19,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21846037] [2023-03-30 23:21:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:19,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:19,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:19,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:19,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:21:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:19,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:19,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-03-30 23:21:19,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:19,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21846037] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:19,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:19,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:21:19,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187026712] [2023-03-30 23:21:19,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:19,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:19,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:19,286 INFO L87 Difference]: Start difference. First operand 47286 states and 62689 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:21:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:22,930 INFO L93 Difference]: Finished difference Result 117908 states and 161877 transitions. [2023-03-30 23:21:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 252 [2023-03-30 23:21:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:23,200 INFO L225 Difference]: With dead ends: 117908 [2023-03-30 23:21:23,200 INFO L226 Difference]: Without dead ends: 70628 [2023-03-30 23:21:23,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:23,267 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 870 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:23,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 1202 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-30 23:21:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70628 states. [2023-03-30 23:21:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70628 to 66783. [2023-03-30 23:21:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66783 states, 65496 states have (on average 1.2019054598754122) internal successors, (78720), 65725 states have internal predecessors, (78720), 342 states have call successors, (342), 342 states have call predecessors, (342), 944 states have return successors, (11778), 715 states have call predecessors, (11778), 341 states have call successors, (11778) [2023-03-30 23:21:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66783 states to 66783 states and 90840 transitions. [2023-03-30 23:21:24,898 INFO L78 Accepts]: Start accepts. Automaton has 66783 states and 90840 transitions. Word has length 252 [2023-03-30 23:21:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:24,899 INFO L495 AbstractCegarLoop]: Abstraction has 66783 states and 90840 transitions. [2023-03-30 23:21:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:21:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 66783 states and 90840 transitions. [2023-03-30 23:21:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-03-30 23:21:24,903 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:24,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:24,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:25,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:25,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:25,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:25,113 INFO L85 PathProgramCache]: Analyzing trace with hash 696551159, now seen corresponding path program 1 times [2023-03-30 23:21:25,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:25,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219671171] [2023-03-30 23:21:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:25,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:25,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:21:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:21:25,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219671171] [2023-03-30 23:21:25,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219671171] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573546013] [2023-03-30 23:21:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:25,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:25,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:25,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:25,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:21:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:25,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:25,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:25,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:21:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573546013] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:21:26,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:21:26,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:21:26,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764736808] [2023-03-30 23:21:26,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:21:26,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:21:26,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:21:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:21:26,241 INFO L87 Difference]: Start difference. First operand 66783 states and 90840 transitions. Second operand has 11 states, 11 states have (on average 40.0) internal successors, (440), 9 states have internal predecessors, (440), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)