/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/Problem13_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:22:59,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:22:59,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:22:59,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:22:59,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:22:59,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:22:59,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:22:59,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:22:59,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:22:59,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:22:59,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:22:59,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:22:59,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:22:59,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:22:59,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:22:59,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:22:59,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:22:59,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:22:59,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:22:59,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:22:59,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:22:59,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:22:59,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:22:59,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:22:59,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:22:59,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:22:59,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:22:59,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:22:59,984 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 23:22:59,997 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:22:59,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:22:59,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:22:59,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:22:59,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:22:59,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:22:59,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:22:59,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:22:59,999 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:22:59,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:22:59,999 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:22:59,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:23:00,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:23:00,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:23:00,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:23:00,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:23:00,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:23:00,000 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:23:00,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:23:00,000 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:23:00,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:23:00,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:23:00,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:23:00,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:23:00,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:23:00,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:23:00,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:23:00,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:23:00,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:23:00,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:23:00,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:23:00,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:23:00,002 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:23:00,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:23:00,002 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:23:00,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:23:00,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:23:00,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:23:00,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:23:00,146 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:23:00,147 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:23:00,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2023-03-30 23:23:01,070 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:23:01,480 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:23:01,480 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2023-03-30 23:23:01,507 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7229ad7a1/cf5f39ece5ec4077a475d0badf52972b/FLAGecb424e0e [2023-03-30 23:23:01,523 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7229ad7a1/cf5f39ece5ec4077a475d0badf52972b [2023-03-30 23:23:01,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:23:01,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:23:01,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:23:01,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:23:01,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:23:01,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:23:01" (1/1) ... [2023-03-30 23:23:01,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8a54dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:01, skipping insertion in model container [2023-03-30 23:23:01,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:23:01" (1/1) ... [2023-03-30 23:23:01,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:23:01,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:23:01,861 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/Problem13_label05.c[6050,6063] [2023-03-30 23:23:02,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:23:02,511 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:23:02,534 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/Problem13_label05.c[6050,6063] [2023-03-30 23:23:02,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:23:02,889 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:23:02,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02 WrapperNode [2023-03-30 23:23:02,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:23:02,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:23:02,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:23:02,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:23:02,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:02,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:02,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:02,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:03,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:03,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:03,073 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:03,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:03,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:23:03,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:23:03,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:23:03,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:23:03,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (1/1) ... [2023-03-30 23:23:03,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:23:03,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:23:03,182 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 23:23:03,197 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 23:23:03,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:23:03,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:23:03,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:23:03,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:23:03,226 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:23:03,226 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:23:03,226 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:23:03,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:23:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:23:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:23:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:23:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:23:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:23:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:23:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:23:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:23:03,306 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:23:03,308 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:23:07,058 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:23:07,074 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:23:07,074 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:23:07,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:23:07 BoogieIcfgContainer [2023-03-30 23:23:07,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:23:07,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:23:07,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:23:07,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:23:07,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:23:01" (1/3) ... [2023-03-30 23:23:07,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2d9417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:23:07, skipping insertion in model container [2023-03-30 23:23:07,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:02" (2/3) ... [2023-03-30 23:23:07,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2d9417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:23:07, skipping insertion in model container [2023-03-30 23:23:07,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:23:07" (3/3) ... [2023-03-30 23:23:07,085 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label05.c [2023-03-30 23:23:07,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:23:07,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:23:07,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:23:07,161 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;@5093bda9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:23:07,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:23:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 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 23:23:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-30 23:23:07,175 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:07,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:07,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:07,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:07,181 INFO L85 PathProgramCache]: Analyzing trace with hash -103618567, now seen corresponding path program 1 times [2023-03-30 23:23:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630493268] [2023-03-30 23:23:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:07,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:07,647 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 23:23:07,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:07,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630493268] [2023-03-30 23:23:07,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630493268] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:07,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:23:07,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:23:07,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116080723] [2023-03-30 23:23:07,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:07,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:23:07,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:23:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:23:07,699 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 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 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:23:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:14,943 INFO L93 Difference]: Finished difference Result 3970 states and 7414 transitions. [2023-03-30 23:23:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:23:14,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-03-30 23:23:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:14,985 INFO L225 Difference]: With dead ends: 3970 [2023-03-30 23:23:14,985 INFO L226 Difference]: Without dead ends: 2783 [2023-03-30 23:23:14,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:23:14,997 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 5683 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 5250 mSolverCounterSat, 2383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5683 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 7633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2383 IncrementalHoareTripleChecker+Valid, 5250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:14,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5683 Valid, 348 Invalid, 7633 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2383 Valid, 5250 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-03-30 23:23:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2023-03-30 23:23:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2758. [2023-03-30 23:23:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2718 states have (on average 1.599337748344371) internal successors, (4347), 2721 states have internal predecessors, (4347), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (52), 22 states have call predecessors, (52), 13 states have call successors, (52) [2023-03-30 23:23:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 4413 transitions. [2023-03-30 23:23:15,120 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 4413 transitions. Word has length 48 [2023-03-30 23:23:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:15,122 INFO L495 AbstractCegarLoop]: Abstraction has 2758 states and 4413 transitions. [2023-03-30 23:23:15,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:23:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 4413 transitions. [2023-03-30 23:23:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-03-30 23:23:15,132 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:15,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:15,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:23:15,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:15,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:15,133 INFO L85 PathProgramCache]: Analyzing trace with hash 405560784, now seen corresponding path program 1 times [2023-03-30 23:23:15,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:15,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838494381] [2023-03-30 23:23:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:15,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:15,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:15,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:15,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:15,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838494381] [2023-03-30 23:23:15,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838494381] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:15,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:23:15,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:23:15,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513463855] [2023-03-30 23:23:15,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:23:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:23:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:23:15,658 INFO L87 Difference]: Start difference. First operand 2758 states and 4413 transitions. Second operand has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 5 states have internal predecessors, (132), 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 23:23:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:22,084 INFO L93 Difference]: Finished difference Result 8172 states and 13340 transitions. [2023-03-30 23:23:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:23:22,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 5 states have internal predecessors, (132), 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 138 [2023-03-30 23:23:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:22,115 INFO L225 Difference]: With dead ends: 8172 [2023-03-30 23:23:22,115 INFO L226 Difference]: Without dead ends: 5420 [2023-03-30 23:23:22,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:23:22,144 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 3388 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 7216 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3388 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 8292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 7216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:22,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3388 Valid, 792 Invalid, 8292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 7216 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-30 23:23:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5420 states. [2023-03-30 23:23:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5420 to 5337. [2023-03-30 23:23:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5221 states have (on average 1.4443593181382877) internal successors, (7541), 5243 states have internal predecessors, (7541), 26 states have call successors, (26), 26 states have call predecessors, (26), 89 states have return successors, (274), 67 states have call predecessors, (274), 25 states have call successors, (274) [2023-03-30 23:23:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 7841 transitions. [2023-03-30 23:23:22,260 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 7841 transitions. Word has length 138 [2023-03-30 23:23:22,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:22,261 INFO L495 AbstractCegarLoop]: Abstraction has 5337 states and 7841 transitions. [2023-03-30 23:23:22,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 5 states have internal predecessors, (132), 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 23:23:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 7841 transitions. [2023-03-30 23:23:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-03-30 23:23:22,264 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:22,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:22,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:23:22,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:22,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2019262709, now seen corresponding path program 1 times [2023-03-30 23:23:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:22,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648113524] [2023-03-30 23:23:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:22,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:22,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:22,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:23:22,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648113524] [2023-03-30 23:23:22,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648113524] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:23:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493431743] [2023-03-30 23:23:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:22,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:23:22,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:23:22,578 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 23:23:22,614 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 23:23:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:22,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:23:22,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:23:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:22,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:23:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:23,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493431743] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:23:23,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:23:23,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 14 [2023-03-30 23:23:23,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479441577] [2023-03-30 23:23:23,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:23,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:23:23,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:23:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:23:23,212 INFO L87 Difference]: Start difference. First operand 5337 states and 7841 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 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 23:23:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:30,403 INFO L93 Difference]: Finished difference Result 20844 states and 32049 transitions. [2023-03-30 23:23:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:23:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 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 148 [2023-03-30 23:23:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:30,462 INFO L225 Difference]: With dead ends: 20844 [2023-03-30 23:23:30,462 INFO L226 Difference]: Without dead ends: 15513 [2023-03-30 23:23:30,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:23:30,479 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 4673 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 6087 mSolverCounterSat, 2649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4673 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 8736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2649 IncrementalHoareTripleChecker+Valid, 6087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:30,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4673 Valid, 473 Invalid, 8736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2649 Valid, 6087 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-03-30 23:23:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15513 states. [2023-03-30 23:23:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15513 to 15383. [2023-03-30 23:23:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15383 states, 15041 states have (on average 1.379496044146001) internal successors, (20749), 15105 states have internal predecessors, (20749), 74 states have call successors, (74), 74 states have call predecessors, (74), 267 states have return successors, (1887), 203 states have call predecessors, (1887), 73 states have call successors, (1887) [2023-03-30 23:23:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15383 states to 15383 states and 22710 transitions. [2023-03-30 23:23:30,839 INFO L78 Accepts]: Start accepts. Automaton has 15383 states and 22710 transitions. Word has length 148 [2023-03-30 23:23:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:30,840 INFO L495 AbstractCegarLoop]: Abstraction has 15383 states and 22710 transitions. [2023-03-30 23:23:30,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 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 23:23:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 15383 states and 22710 transitions. [2023-03-30 23:23:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-03-30 23:23:30,843 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:30,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:30,863 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 23:23:31,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:23:31,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:31,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:31,065 INFO L85 PathProgramCache]: Analyzing trace with hash 442659649, now seen corresponding path program 1 times [2023-03-30 23:23:31,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:31,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947893139] [2023-03-30 23:23:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:31,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:31,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:31,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:31,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:31,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947893139] [2023-03-30 23:23:31,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947893139] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:23:31,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817163854] [2023-03-30 23:23:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:31,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:23:31,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:23:31,302 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 23:23:31,306 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 23:23:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:31,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:23:31,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:23:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:31,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:23:31,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817163854] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:31,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:23:31,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:23:31,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476811994] [2023-03-30 23:23:31,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:31,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:23:31,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:23:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:23:31,447 INFO L87 Difference]: Start difference. First operand 15383 states and 22710 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 23:23:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:34,750 INFO L93 Difference]: Finished difference Result 45541 states and 70458 transitions. [2023-03-30 23:23:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:23:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 168 [2023-03-30 23:23:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:34,843 INFO L225 Difference]: With dead ends: 45541 [2023-03-30 23:23:34,843 INFO L226 Difference]: Without dead ends: 30164 [2023-03-30 23:23:34,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 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 23:23:34,872 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 1137 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2514 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 2514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:34,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 1614 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 2514 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:23:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30164 states. [2023-03-30 23:23:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30164 to 30155. [2023-03-30 23:23:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30155 states, 29549 states have (on average 1.3287759315036043) internal successors, (39264), 29654 states have internal predecessors, (39264), 146 states have call successors, (146), 146 states have call predecessors, (146), 459 states have return successors, (5540), 354 states have call predecessors, (5540), 145 states have call successors, (5540) [2023-03-30 23:23:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30155 states to 30155 states and 44950 transitions. [2023-03-30 23:23:35,468 INFO L78 Accepts]: Start accepts. Automaton has 30155 states and 44950 transitions. Word has length 168 [2023-03-30 23:23:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:35,470 INFO L495 AbstractCegarLoop]: Abstraction has 30155 states and 44950 transitions. [2023-03-30 23:23:35,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 23:23:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 30155 states and 44950 transitions. [2023-03-30 23:23:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-03-30 23:23:35,475 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:35,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:35,493 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 23:23:35,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:23:35,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:35,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:35,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1511675970, now seen corresponding path program 1 times [2023-03-30 23:23:35,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:35,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064944411] [2023-03-30 23:23:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:35,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:35,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:35,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:36,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:36,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064944411] [2023-03-30 23:23:36,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064944411] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:36,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:23:36,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:23:36,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901722175] [2023-03-30 23:23:36,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:36,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:23:36,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:23:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:23:36,148 INFO L87 Difference]: Start difference. First operand 30155 states and 44950 transitions. Second operand has 7 states, 6 states have (on average 36.166666666666664) internal successors, (217), 4 states have internal predecessors, (217), 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 23:23:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:42,664 INFO L93 Difference]: Finished difference Result 86897 states and 137155 transitions. [2023-03-30 23:23:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:23:42,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 36.166666666666664) internal successors, (217), 4 states have internal predecessors, (217), 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 223 [2023-03-30 23:23:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:42,883 INFO L225 Difference]: With dead ends: 86897 [2023-03-30 23:23:42,883 INFO L226 Difference]: Without dead ends: 56748 [2023-03-30 23:23:42,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:23:42,940 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 4683 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 6262 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4683 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 7028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 6262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:42,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4683 Valid, 680 Invalid, 7028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 6262 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-30 23:23:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56748 states. [2023-03-30 23:23:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56748 to 56724. [2023-03-30 23:23:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56724 states, 55543 states have (on average 1.2792071008047818) internal successors, (71051), 55764 states have internal predecessors, (71051), 274 states have call successors, (274), 274 states have call predecessors, (274), 906 states have return successors, (14279), 685 states have call predecessors, (14279), 273 states have call successors, (14279) [2023-03-30 23:23:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56724 states to 56724 states and 85604 transitions. [2023-03-30 23:23:44,026 INFO L78 Accepts]: Start accepts. Automaton has 56724 states and 85604 transitions. Word has length 223 [2023-03-30 23:23:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:44,027 INFO L495 AbstractCegarLoop]: Abstraction has 56724 states and 85604 transitions. [2023-03-30 23:23:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 36.166666666666664) internal successors, (217), 4 states have internal predecessors, (217), 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 23:23:44,027 INFO L276 IsEmpty]: Start isEmpty. Operand 56724 states and 85604 transitions. [2023-03-30 23:23:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-03-30 23:23:44,036 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:44,036 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:44,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-30 23:23:44,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:44,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:44,037 INFO L85 PathProgramCache]: Analyzing trace with hash -579698528, now seen corresponding path program 1 times [2023-03-30 23:23:44,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:44,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300737718] [2023-03-30 23:23:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:44,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:44,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:44,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-30 23:23:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:23:44,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:44,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300737718] [2023-03-30 23:23:44,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300737718] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:23:44,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596597111] [2023-03-30 23:23:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:44,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:23:44,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:23:44,749 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 23:23:44,792 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 23:23:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:44,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:23:44,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:23:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-03-30 23:23:44,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:23:44,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596597111] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:44,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:23:44,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 23:23:44,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417669982] [2023-03-30 23:23:44,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:23:44,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:44,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:23:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:23:44,976 INFO L87 Difference]: Start difference. First operand 56724 states and 85604 transitions. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 4 states have internal predecessors, (230), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:23:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:49,163 INFO L93 Difference]: Finished difference Result 112264 states and 175170 transitions. [2023-03-30 23:23:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:23:49,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 4 states have internal predecessors, (230), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 278 [2023-03-30 23:23:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:49,307 INFO L225 Difference]: With dead ends: 112264 [2023-03-30 23:23:49,308 INFO L226 Difference]: Without dead ends: 56349 [2023-03-30 23:23:49,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:23:49,463 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 3149 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4200 mSolverCounterSat, 1389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3149 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 5589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1389 IncrementalHoareTripleChecker+Valid, 4200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:49,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3149 Valid, 659 Invalid, 5589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1389 Valid, 4200 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-30 23:23:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56349 states. [2023-03-30 23:23:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56349 to 56139. [2023-03-30 23:23:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56139 states, 54876 states have (on average 1.1724615496756323) internal successors, (64340), 55132 states have internal predecessors, (64340), 270 states have call successors, (270), 270 states have call predecessors, (270), 992 states have return successors, (10135), 736 states have call predecessors, (10135), 269 states have call successors, (10135) [2023-03-30 23:23:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56139 states to 56139 states and 74745 transitions. [2023-03-30 23:23:50,293 INFO L78 Accepts]: Start accepts. Automaton has 56139 states and 74745 transitions. Word has length 278 [2023-03-30 23:23:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:50,293 INFO L495 AbstractCegarLoop]: Abstraction has 56139 states and 74745 transitions. [2023-03-30 23:23:50,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 4 states have internal predecessors, (230), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:23:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 56139 states and 74745 transitions. [2023-03-30 23:23:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-03-30 23:23:50,302 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:50,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:50,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 23:23:50,507 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 23:23:50,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:50,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash 285860269, now seen corresponding path program 1 times [2023-03-30 23:23:50,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:50,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132864419] [2023-03-30 23:23:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:50,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:50,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:50,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-03-30 23:23:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:51,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-03-30 23:23:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-03-30 23:23:51,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:51,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132864419] [2023-03-30 23:23:51,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132864419] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:23:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241182537] [2023-03-30 23:23:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:51,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:23:51,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:23:51,173 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 23:23:51,220 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 23:23:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:51,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:23:51,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:23:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-03-30 23:23:51,547 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:23:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241182537] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:51,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:23:51,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-30 23:23:51,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541331340] [2023-03-30 23:23:51,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:51,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:23:51,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:23:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:23:51,550 INFO L87 Difference]: Start difference. First operand 56139 states and 74745 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:23:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:56,432 INFO L93 Difference]: Finished difference Result 121370 states and 163739 transitions. [2023-03-30 23:23:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:23:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 293 [2023-03-30 23:23:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:56,689 INFO L225 Difference]: With dead ends: 121370 [2023-03-30 23:23:56,689 INFO L226 Difference]: Without dead ends: 66040 [2023-03-30 23:23:56,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:23:56,749 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 2696 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 5289 mSolverCounterSat, 895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2696 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 6184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 895 IncrementalHoareTripleChecker+Valid, 5289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:56,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2696 Valid, 580 Invalid, 6184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [895 Valid, 5289 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-30 23:23:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66040 states. [2023-03-30 23:23:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66040 to 65878. [2023-03-30 23:23:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65878 states, 64173 states have (on average 1.153039440263039) internal successors, (73994), 64593 states have internal predecessors, (73994), 314 states have call successors, (314), 314 states have call predecessors, (314), 1390 states have return successors, (14205), 970 states have call predecessors, (14205), 313 states have call successors, (14205) [2023-03-30 23:23:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65878 states to 65878 states and 88513 transitions. [2023-03-30 23:23:58,190 INFO L78 Accepts]: Start accepts. Automaton has 65878 states and 88513 transitions. Word has length 293 [2023-03-30 23:23:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:58,190 INFO L495 AbstractCegarLoop]: Abstraction has 65878 states and 88513 transitions. [2023-03-30 23:23:58,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:23:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 65878 states and 88513 transitions. [2023-03-30 23:23:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-03-30 23:23:58,197 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:58,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:58,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-30 23:23:58,402 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 23:23:58,402 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:58,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:58,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2041468498, now seen corresponding path program 1 times [2023-03-30 23:23:58,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:58,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498205760] [2023-03-30 23:23:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:58,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:59,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:59,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-03-30 23:23:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 83 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:23:59,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:59,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498205760] [2023-03-30 23:23:59,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498205760] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:23:59,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659609973] [2023-03-30 23:23:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:59,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:23:59,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:23:59,454 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 23:23:59,456 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 23:23:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:59,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:23:59,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:23:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-03-30 23:23:59,775 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:23:59,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659609973] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:59,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:23:59,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2023-03-30 23:23:59,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594899607] [2023-03-30 23:23:59,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:23:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:23:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:23:59,777 INFO L87 Difference]: Start difference. First operand 65878 states and 88513 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)