/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 00:01:55,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 00:01:55,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 00:01:55,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 00:01:55,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 00:01:55,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 00:01:55,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 00:01:55,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 00:01:55,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 00:01:55,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 00:01:55,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 00:01:55,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 00:01:55,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 00:01:55,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 00:01:55,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 00:01:55,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 00:01:55,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 00:01:55,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 00:01:55,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 00:01:55,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 00:01:55,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 00:01:55,125 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 00:01:55,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 00:01:55,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 00:01:55,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 00:01:55,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 00:01:55,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 00:01:55,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 00:01:55,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 00:01:55,128 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 00:01:55,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 00:01:55,129 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 00:01:55,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 00:01:55,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 00:01:55,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 00:01:55,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 00:01:55,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 00:01:55,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:01:55,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 00:01:55,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 00:01:55,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 00:01:55,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 00:01:55,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 00:01:55,132 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 00:01:55,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 00:01:55,132 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 00:01:55,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 00:01:55,133 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 00:01:55,133 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 00:01:55,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 00:01:55,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 00:01:55,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 00:01:55,392 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 00:01:55,392 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 00:01:55,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label52.c [2023-04-02 00:01:56,589 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 00:01:57,114 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 00:01:57,115 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label52.c [2023-04-02 00:01:57,162 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6db228c1/d2755c2d1e594d1695258081506ca131/FLAG9fb045fb6 [2023-04-02 00:01:57,177 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6db228c1/d2755c2d1e594d1695258081506ca131 [2023-04-02 00:01:57,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 00:01:57,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 00:01:57,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 00:01:57,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 00:01:57,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 00:01:57,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:01:57" (1/1) ... [2023-04-02 00:01:57,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c848ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:57, skipping insertion in model container [2023-04-02 00:01:57,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:01:57" (1/1) ... [2023-04-02 00:01:57,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 00:01:57,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 00:01:57,635 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label52.c[7226,7239] [2023-04-02 00:01:58,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:01:58,769 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 00:01:58,804 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label52.c[7226,7239] [2023-04-02 00:01:59,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:01:59,505 INFO L208 MainTranslator]: Completed translation [2023-04-02 00:01:59,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59 WrapperNode [2023-04-02 00:01:59,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 00:01:59,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 00:01:59,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 00:01:59,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 00:01:59,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:01:59,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:01:59,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:01:59,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:01:59,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:01:59,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:01:59,945 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:01:59,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:02:00,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 00:02:00,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 00:02:00,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 00:02:00,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 00:02:00,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (1/1) ... [2023-04-02 00:02:00,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:02:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:02:00,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 00:02:00,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 00:02:00,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 00:02:00,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 00:02:00,096 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 00:02:00,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 00:02:00,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 00:02:00,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 00:02:00,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 00:02:00,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-02 00:02:00,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-02 00:02:00,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 00:02:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 00:02:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 00:02:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 00:02:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 00:02:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 00:02:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 00:02:00,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 00:02:00,231 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 00:02:00,233 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 00:02:07,774 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 00:02:07,798 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 00:02:07,798 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 00:02:07,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:02:07 BoogieIcfgContainer [2023-04-02 00:02:07,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 00:02:07,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 00:02:07,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 00:02:07,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 00:02:07,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 12:01:57" (1/3) ... [2023-04-02 00:02:07,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a82e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:02:07, skipping insertion in model container [2023-04-02 00:02:07,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:01:59" (2/3) ... [2023-04-02 00:02:07,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a82e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:02:07, skipping insertion in model container [2023-04-02 00:02:07,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:02:07" (3/3) ... [2023-04-02 00:02:07,812 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label52.c [2023-04-02 00:02:07,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 00:02:07,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 00:02:07,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 00:02:07,926 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;@2580661f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 00:02:07,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 00:02:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 00:02:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 00:02:07,946 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:07,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:02:07,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:07,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1410742312, now seen corresponding path program 1 times [2023-04-02 00:02:07,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:07,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774703329] [2023-04-02 00:02:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:07,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:08,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:08,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:08,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774703329] [2023-04-02 00:02:08,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774703329] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:08,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:02:08,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 00:02:08,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902651962] [2023-04-02 00:02:08,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:08,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 00:02:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 00:02:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:02:08,553 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:02:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:02:23,587 INFO L93 Difference]: Finished difference Result 6479 states and 12300 transitions. [2023-04-02 00:02:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 00:02:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 61 [2023-04-02 00:02:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:02:23,630 INFO L225 Difference]: With dead ends: 6479 [2023-04-02 00:02:23,630 INFO L226 Difference]: Without dead ends: 4634 [2023-04-02 00:02:23,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:02:23,649 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 6098 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 11995 mSolverCounterSat, 2910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6098 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 14905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2910 IncrementalHoareTripleChecker+Valid, 11995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-04-02 00:02:23,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6098 Valid, 504 Invalid, 14905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2910 Valid, 11995 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2023-04-02 00:02:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2023-04-02 00:02:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4626. [2023-04-02 00:02:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4568 states have (on average 1.6786339754816113) internal successors, (7668), 4571 states have internal predecessors, (7668), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-04-02 00:02:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7765 transitions. [2023-04-02 00:02:23,860 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7765 transitions. Word has length 61 [2023-04-02 00:02:23,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:02:23,862 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7765 transitions. [2023-04-02 00:02:23,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:02:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7765 transitions. [2023-04-02 00:02:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-02 00:02:23,867 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:23,867 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, 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] [2023-04-02 00:02:23,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 00:02:23,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:23,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:23,869 INFO L85 PathProgramCache]: Analyzing trace with hash -549911637, now seen corresponding path program 1 times [2023-04-02 00:02:23,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:23,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148587017] [2023-04-02 00:02:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:23,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:24,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:24,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:02:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:24,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148587017] [2023-04-02 00:02:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148587017] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:24,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:02:24,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 00:02:24,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442915292] [2023-04-02 00:02:24,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:24,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 00:02:24,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 00:02:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:02:24,251 INFO L87 Difference]: Start difference. First operand 4626 states and 7765 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:02:43,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:02:43,262 INFO L93 Difference]: Finished difference Result 22107 states and 38124 transitions. [2023-04-02 00:02:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 00:02:43,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 4 states have internal predecessors, (128), 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 134 [2023-04-02 00:02:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:02:43,363 INFO L225 Difference]: With dead ends: 22107 [2023-04-02 00:02:43,364 INFO L226 Difference]: Without dead ends: 17487 [2023-04-02 00:02:43,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 00:02:43,385 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 11767 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 13045 mSolverCounterSat, 3900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11767 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 16945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3900 IncrementalHoareTripleChecker+Valid, 13045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2023-04-02 00:02:43,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11767 Valid, 781 Invalid, 16945 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3900 Valid, 13045 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2023-04-02 00:02:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17487 states. [2023-04-02 00:02:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17487 to 17464. [2023-04-02 00:02:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17464 states, 17244 states have (on average 1.4196242171189979) internal successors, (24480), 17256 states have internal predecessors, (24480), 74 states have call successors, (74), 74 states have call predecessors, (74), 145 states have return successors, (764), 133 states have call predecessors, (764), 73 states have call successors, (764) [2023-04-02 00:02:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17464 states to 17464 states and 25318 transitions. [2023-04-02 00:02:43,838 INFO L78 Accepts]: Start accepts. Automaton has 17464 states and 25318 transitions. Word has length 134 [2023-04-02 00:02:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:02:43,840 INFO L495 AbstractCegarLoop]: Abstraction has 17464 states and 25318 transitions. [2023-04-02 00:02:43,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:02:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 17464 states and 25318 transitions. [2023-04-02 00:02:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-02 00:02:43,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:43,845 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:02:43,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 00:02:43,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:43,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1487685040, now seen corresponding path program 1 times [2023-04-02 00:02:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572289868] [2023-04-02 00:02:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:44,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:44,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:02:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:44,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:44,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572289868] [2023-04-02 00:02:44,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572289868] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:44,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:02:44,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 00:02:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325624799] [2023-04-02 00:02:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:44,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 00:02:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 00:02:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:02:44,323 INFO L87 Difference]: Start difference. First operand 17464 states and 25318 transitions. Second operand has 7 states, 6 states have (on average 26.5) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:02:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:02:56,000 INFO L93 Difference]: Finished difference Result 52857 states and 78569 transitions. [2023-04-02 00:02:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 00:02:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 26.5) internal successors, (159), 4 states have internal predecessors, (159), 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 165 [2023-04-02 00:02:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:02:56,243 INFO L225 Difference]: With dead ends: 52857 [2023-04-02 00:02:56,243 INFO L226 Difference]: Without dead ends: 35399 [2023-04-02 00:02:56,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:02:56,287 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 11160 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 10957 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11160 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 12765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 10957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:02:56,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11160 Valid, 1123 Invalid, 12765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 10957 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2023-04-02 00:02:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35399 states. [2023-04-02 00:02:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35399 to 31131. [2023-04-02 00:02:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31131 states, 30462 states have (on average 1.2870133280808878) internal successors, (39205), 30536 states have internal predecessors, (39205), 128 states have call successors, (128), 128 states have call predecessors, (128), 540 states have return successors, (3103), 466 states have call predecessors, (3103), 127 states have call successors, (3103) [2023-04-02 00:02:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31131 states to 31131 states and 42436 transitions. [2023-04-02 00:02:57,079 INFO L78 Accepts]: Start accepts. Automaton has 31131 states and 42436 transitions. Word has length 165 [2023-04-02 00:02:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:02:57,081 INFO L495 AbstractCegarLoop]: Abstraction has 31131 states and 42436 transitions. [2023-04-02 00:02:57,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 26.5) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:02:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 31131 states and 42436 transitions. [2023-04-02 00:02:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-02 00:02:57,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:57,089 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:02:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 00:02:57,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:57,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2047858972, now seen corresponding path program 1 times [2023-04-02 00:02:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:57,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17624542] [2023-04-02 00:02:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:02:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:57,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-02 00:02:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 108 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 00:02:57,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:57,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17624542] [2023-04-02 00:02:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17624542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:02:57,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836355305] [2023-04-02 00:02:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:57,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:02:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:02:57,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:02:57,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 00:02:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:57,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 00:02:57,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:02:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 00:02:57,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:02:57,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836355305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:57,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:02:57,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-02 00:02:57,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828133450] [2023-04-02 00:02:57,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:57,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 00:02:57,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:57,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 00:02:57,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 00:02:57,754 INFO L87 Difference]: Start difference. First operand 31131 states and 42436 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 00:03:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:04,332 INFO L93 Difference]: Finished difference Result 92419 states and 130917 transitions. [2023-04-02 00:03:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 00:03:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 230 [2023-04-02 00:03:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:04,602 INFO L225 Difference]: With dead ends: 92419 [2023-04-02 00:03:04,603 INFO L226 Difference]: Without dead ends: 61294 [2023-04-02 00:03:04,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 00:03:04,672 INFO L413 NwaCegarLoop]: 1476 mSDtfsCounter, 1616 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 1752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 6028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1752 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:04,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1616 Valid, 1631 Invalid, 6028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1752 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-02 00:03:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61294 states. [2023-04-02 00:03:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61294 to 58353. [2023-04-02 00:03:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58353 states, 57165 states have (on average 1.2449575789381615) internal successors, (71168), 57300 states have internal predecessors, (71168), 242 states have call successors, (242), 242 states have call predecessors, (242), 945 states have return successors, (8318), 810 states have call predecessors, (8318), 241 states have call successors, (8318) [2023-04-02 00:03:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58353 states to 58353 states and 79728 transitions. [2023-04-02 00:03:05,952 INFO L78 Accepts]: Start accepts. Automaton has 58353 states and 79728 transitions. Word has length 230 [2023-04-02 00:03:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:05,953 INFO L495 AbstractCegarLoop]: Abstraction has 58353 states and 79728 transitions. [2023-04-02 00:03:05,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 00:03:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 58353 states and 79728 transitions. [2023-04-02 00:03:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2023-04-02 00:03:05,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:05,972 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:05,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 00:03:06,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:06,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:06,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:06,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1074815148, now seen corresponding path program 1 times [2023-04-02 00:03:06,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:06,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176788187] [2023-04-02 00:03:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:06,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:07,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:07,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:08,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:03:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:08,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2023-04-02 00:03:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:08,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2023-04-02 00:03:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 258 proven. 97 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-04-02 00:03:08,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:08,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176788187] [2023-04-02 00:03:08,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176788187] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:08,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849235909] [2023-04-02 00:03:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:08,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:08,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:08,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:03:08,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 00:03:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:08,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:03:08,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 421 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 00:03:08,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:03:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 262 proven. 98 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-04-02 00:03:09,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849235909] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:03:09,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:03:09,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-04-02 00:03:09,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416087060] [2023-04-02 00:03:09,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:03:09,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:03:09,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:03:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:03:09,275 INFO L87 Difference]: Start difference. First operand 58353 states and 79728 transitions. Second operand has 12 states, 12 states have (on average 76.75) internal successors, (921), 10 states have internal predecessors, (921), 4 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 00:03:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:31,089 INFO L93 Difference]: Finished difference Result 180708 states and 273461 transitions. [2023-04-02 00:03:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-02 00:03:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 76.75) internal successors, (921), 10 states have internal predecessors, (921), 4 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 787 [2023-04-02 00:03:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:31,867 INFO L225 Difference]: With dead ends: 180708 [2023-04-02 00:03:31,867 INFO L226 Difference]: Without dead ends: 122361 [2023-04-02 00:03:31,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1651 GetRequests, 1607 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 00:03:31,944 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 17836 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 25181 mSolverCounterSat, 5568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17846 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 30749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5568 IncrementalHoareTripleChecker+Valid, 25181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:31,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17846 Valid, 1795 Invalid, 30749 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5568 Valid, 25181 Invalid, 0 Unknown, 0 Unchecked, 19.4s Time] [2023-04-02 00:03:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122361 states. [2023-04-02 00:03:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122361 to 121148. [2023-04-02 00:03:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121148 states, 117344 states have (on average 1.1519208481047178) internal successors, (135171), 118020 states have internal predecessors, (135171), 488 states have call successors, (488), 488 states have call predecessors, (488), 3315 states have return successors, (25995), 2639 states have call predecessors, (25995), 487 states have call successors, (25995) [2023-04-02 00:03:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121148 states to 121148 states and 161654 transitions. [2023-04-02 00:03:35,578 INFO L78 Accepts]: Start accepts. Automaton has 121148 states and 161654 transitions. Word has length 787 [2023-04-02 00:03:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:35,580 INFO L495 AbstractCegarLoop]: Abstraction has 121148 states and 161654 transitions. [2023-04-02 00:03:35,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.75) internal successors, (921), 10 states have internal predecessors, (921), 4 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 00:03:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 121148 states and 161654 transitions. [2023-04-02 00:03:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2023-04-02 00:03:35,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:35,609 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:35,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 00:03:35,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:35,817 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:35,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:35,817 INFO L85 PathProgramCache]: Analyzing trace with hash -558071649, now seen corresponding path program 1 times [2023-04-02 00:03:35,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:35,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686213712] [2023-04-02 00:03:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:35,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:37,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:37,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:03:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:03:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:37,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-02 00:03:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:37,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2023-04-02 00:03:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 543 proven. 11 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-04-02 00:03:37,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:37,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686213712] [2023-04-02 00:03:37,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686213712] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:37,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331249228] [2023-04-02 00:03:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:37,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:03:37,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 00:03:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:38,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 00:03:38,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-04-02 00:03:38,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:03:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 403 proven. 89 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2023-04-02 00:03:38,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331249228] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:03:38,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:03:38,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2023-04-02 00:03:38,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552728871] [2023-04-02 00:03:38,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:03:38,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 00:03:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:38,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 00:03:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-02 00:03:38,722 INFO L87 Difference]: Start difference. First operand 121148 states and 161654 transitions. Second operand has 17 states, 17 states have (on average 54.470588235294116) internal successors, (926), 15 states have internal predecessors, (926), 6 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-02 00:05:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:05:18,681 INFO L93 Difference]: Finished difference Result 651581 states and 981014 transitions. [2023-04-02 00:05:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2023-04-02 00:05:18,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 54.470588235294116) internal successors, (926), 15 states have internal predecessors, (926), 6 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 981 [2023-04-02 00:05:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:05:21,065 INFO L225 Difference]: With dead ends: 651581 [2023-04-02 00:05:21,065 INFO L226 Difference]: Without dead ends: 506813 [2023-04-02 00:05:21,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2426 GetRequests, 2175 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28068 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5759, Invalid=57493, Unknown=0, NotChecked=0, Total=63252 [2023-04-02 00:05:21,509 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 73240 mSDsluCounter, 4556 mSDsCounter, 0 mSdLazyCounter, 113054 mSolverCounterSat, 18523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73240 SdHoareTripleChecker+Valid, 5200 SdHoareTripleChecker+Invalid, 131577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 18523 IncrementalHoareTripleChecker+Valid, 113054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.6s IncrementalHoareTripleChecker+Time [2023-04-02 00:05:21,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73240 Valid, 5200 Invalid, 131577 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [18523 Valid, 113054 Invalid, 0 Unknown, 0 Unchecked, 85.6s Time] [2023-04-02 00:05:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506813 states.