/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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:53:56,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:53:56,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:53:56,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:53:56,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:53:56,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:53:56,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:53:56,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:53:56,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:53:56,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:53:56,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:53:56,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:53:56,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:53:56,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:53:56,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:53:56,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:53:56,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:53:56,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:53:56,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:53:56,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:53:56,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:53:56,121 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:53:56,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:53:56,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:53:56,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:53:56,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:53:56,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:53:56,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:53:56,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:53:56,124 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:53:56,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:53:56,125 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:53:56,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:53:56,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:53:56,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:53:56,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:53:56,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:53:56,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:53:56,125 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:53:56,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:53:56,126 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:53:56,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:53:56,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:53:56,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:53:56,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:53:56,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:53:56,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:53:56,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:53:56,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:53:56,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:53:56,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:53:56,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:53:56,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:53:56,128 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:53:56,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:53:56,128 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:53:56,128 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:53:56,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:53:56,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:53:56,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:53:56,409 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:53:56,409 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:53:56,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label22.c [2023-04-01 23:53:57,597 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:53:58,140 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:53:58,140 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label22.c [2023-04-01 23:53:58,186 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3a66b299/88cf6bdd0eaa4febaf1cb62b84317c79/FLAG17e4d7677 [2023-04-01 23:53:58,204 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3a66b299/88cf6bdd0eaa4febaf1cb62b84317c79 [2023-04-01 23:53:58,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:53:58,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:53:58,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:53:58,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:53:58,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:53:58,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43665286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:53:58, skipping insertion in model container [2023-04-01 23:53:58,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:53:58" (1/1) ... [2023-04-01 23:53:58,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:53:58,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:53:58,772 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_label22.c[4094,4107] [2023-04-01 23:53:59,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:53:59,856 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:53:59,884 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_label22.c[4094,4107] [2023-04-01 23:54:00,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:54:00,542 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:54:00,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00 WrapperNode [2023-04-01 23:54:00,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:54:00,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:54:00,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:54:00,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:54:00,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:00,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:00,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:00,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:00,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:00,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:00,966 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:00,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:01,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:54:01,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:54:01,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:54:01,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:54:01,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (1/1) ... [2023-04-01 23:54:01,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:54:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:54:01,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:54:01,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:54:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:54:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:54:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:54:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:54:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:54:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:54:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:54:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:54:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:54:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:54:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:54:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:54:01,327 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:54:01,329 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:54:08,620 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:54:08,639 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:54:08,640 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:54:08,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:54:08 BoogieIcfgContainer [2023-04-01 23:54:08,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:54:08,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:54:08,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:54:08,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:54:08,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:53:58" (1/3) ... [2023-04-01 23:54:08,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afda2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:54:08, skipping insertion in model container [2023-04-01 23:54:08,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:54:00" (2/3) ... [2023-04-01 23:54:08,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afda2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:54:08, skipping insertion in model container [2023-04-01 23:54:08,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:54:08" (3/3) ... [2023-04-01 23:54:08,651 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label22.c [2023-04-01 23:54:08,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:54:08,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:54:08,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:54:08,736 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;@6e958315, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:54:08,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:54:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 23:54:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 23:54:08,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:08,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:08,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:08,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash -717151936, now seen corresponding path program 1 times [2023-04-01 23:54:08,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:08,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956205172] [2023-04-01 23:54:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:08,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:09,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:54:09,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:09,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956205172] [2023-04-01 23:54:09,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956205172] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:09,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:54:09,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:54:09,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778234574] [2023-04-01 23:54:09,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:09,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:54:09,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:09,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:54:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:54:09,301 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 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:54:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:54:23,350 INFO L93 Difference]: Finished difference Result 6587 states and 12523 transitions. [2023-04-01 23:54:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:54:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-04-01 23:54:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:54:23,386 INFO L225 Difference]: With dead ends: 6587 [2023-04-01 23:54:23,386 INFO L226 Difference]: Without dead ends: 4742 [2023-04-01 23:54:23,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:54:23,404 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 6336 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 10950 mSolverCounterSat, 2799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6336 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 13749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2799 IncrementalHoareTripleChecker+Valid, 10950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:54:23,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6336 Valid, 464 Invalid, 13749 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2799 Valid, 10950 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2023-04-01 23:54:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2023-04-01 23:54:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4621. [2023-04-01 23:54:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4566 states have (on average 1.7636881296539642) internal successors, (8053), 4569 states have internal predecessors, (8053), 20 states have call successors, (20), 20 states have call predecessors, (20), 34 states have return successors, (74), 31 states have call predecessors, (74), 19 states have call successors, (74) [2023-04-01 23:54:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 8147 transitions. [2023-04-01 23:54:23,686 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 8147 transitions. Word has length 35 [2023-04-01 23:54:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:23,687 INFO L495 AbstractCegarLoop]: Abstraction has 4621 states and 8147 transitions. [2023-04-01 23:54:23,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:54:23,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 8147 transitions. [2023-04-01 23:54:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 23:54:23,695 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:23,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:23,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:54:23,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:23,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash 285106042, now seen corresponding path program 1 times [2023-04-01 23:54:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:23,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576485259] [2023-04-01 23:54:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:23,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:23,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:24,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:54:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:24,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576485259] [2023-04-01 23:54:24,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576485259] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:24,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:54:24,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:54:24,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868549261] [2023-04-01 23:54:24,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:24,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 23:54:24,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:24,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 23:54:24,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:54:24,213 INFO L87 Difference]: Start difference. First operand 4621 states and 8147 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:54:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:54:39,851 INFO L93 Difference]: Finished difference Result 18006 states and 32711 transitions. [2023-04-01 23:54:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 23:54:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 107 [2023-04-01 23:54:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:54:39,917 INFO L225 Difference]: With dead ends: 18006 [2023-04-01 23:54:39,917 INFO L226 Difference]: Without dead ends: 13391 [2023-04-01 23:54:39,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:54:39,936 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 8090 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 17082 mSolverCounterSat, 2351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8090 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 19433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2351 IncrementalHoareTripleChecker+Valid, 17082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:54:39,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8090 Valid, 1224 Invalid, 19433 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2351 Valid, 17082 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2023-04-01 23:54:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13391 states. [2023-04-01 23:54:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13391 to 13312. [2023-04-01 23:54:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13312 states, 13069 states have (on average 1.5861963424898615) internal successors, (20730), 13093 states have internal predecessors, (20730), 56 states have call successors, (56), 56 states have call predecessors, (56), 186 states have return successors, (834), 162 states have call predecessors, (834), 55 states have call successors, (834) [2023-04-01 23:54:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13312 states to 13312 states and 21620 transitions. [2023-04-01 23:54:40,287 INFO L78 Accepts]: Start accepts. Automaton has 13312 states and 21620 transitions. Word has length 107 [2023-04-01 23:54:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:40,288 INFO L495 AbstractCegarLoop]: Abstraction has 13312 states and 21620 transitions. [2023-04-01 23:54:40,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:54:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 13312 states and 21620 transitions. [2023-04-01 23:54:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 23:54:40,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:40,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:40,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:54:40,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:40,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1326384565, now seen corresponding path program 1 times [2023-04-01 23:54:40,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:40,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645552924] [2023-04-01 23:54:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:40,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:40,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:54:40,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:40,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645552924] [2023-04-01 23:54:40,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645552924] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:40,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:54:40,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:54:40,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534994187] [2023-04-01 23:54:40,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:40,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:54:40,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:54:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:54:40,883 INFO L87 Difference]: Start difference. First operand 13312 states and 21620 transitions. Second operand has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:54:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:54:52,836 INFO L93 Difference]: Finished difference Result 40646 states and 69201 transitions. [2023-04-01 23:54:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:54:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 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 162 [2023-04-01 23:54:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:54:52,955 INFO L225 Difference]: With dead ends: 40646 [2023-04-01 23:54:52,955 INFO L226 Difference]: Without dead ends: 27340 [2023-04-01 23:54:53,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:54:53,003 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 5725 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 11932 mSolverCounterSat, 1780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5725 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 13712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1780 IncrementalHoareTripleChecker+Valid, 11932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:54:53,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5725 Valid, 1044 Invalid, 13712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1780 Valid, 11932 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2023-04-01 23:54:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27340 states. [2023-04-01 23:54:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27340 to 26914. [2023-04-01 23:54:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26914 states, 26235 states have (on average 1.3780064798932723) internal successors, (36152), 26325 states have internal predecessors, (36152), 110 states have call successors, (110), 110 states have call predecessors, (110), 568 states have return successors, (3561), 478 states have call predecessors, (3561), 109 states have call successors, (3561) [2023-04-01 23:54:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26914 states to 26914 states and 39823 transitions. [2023-04-01 23:54:53,736 INFO L78 Accepts]: Start accepts. Automaton has 26914 states and 39823 transitions. Word has length 162 [2023-04-01 23:54:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:53,737 INFO L495 AbstractCegarLoop]: Abstraction has 26914 states and 39823 transitions. [2023-04-01 23:54:53,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:54:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 26914 states and 39823 transitions. [2023-04-01 23:54:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 23:54:53,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:53,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:53,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:54:53,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:53,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:53,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1097728428, now seen corresponding path program 1 times [2023-04-01 23:54:53,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:53,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972981658] [2023-04-01 23:54:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:53,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:54,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:54,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-04-01 23:54:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:54:54,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972981658] [2023-04-01 23:54:54,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972981658] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:54:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59673290] [2023-04-01 23:54:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:54,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:54:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:54:54,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:54:54,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:54:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:54,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:54:54,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:54:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 23:54:54,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:54:54,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59673290] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:54:54,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:54:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-04-01 23:54:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658850424] [2023-04-01 23:54:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:54:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:54:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:54:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:54:54,483 INFO L87 Difference]: Start difference. First operand 26914 states and 39823 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:02,812 INFO L93 Difference]: Finished difference Result 81575 states and 126661 transitions. [2023-04-01 23:55:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:55:02,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 188 [2023-04-01 23:55:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:03,026 INFO L225 Difference]: With dead ends: 81575 [2023-04-01 23:55:03,027 INFO L226 Difference]: Without dead ends: 54667 [2023-04-01 23:55:03,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:55:03,112 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 8203 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 8094 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8203 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 9103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 8094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:03,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8203 Valid, 924 Invalid, 9103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 8094 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-04-01 23:55:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54667 states. [2023-04-01 23:55:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54667 to 46922. [2023-04-01 23:55:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46922 states, 45445 states have (on average 1.3662449114314006) internal successors, (62089), 45686 states have internal predecessors, (62089), 188 states have call successors, (188), 188 states have call predecessors, (188), 1288 states have return successors, (8553), 1047 states have call predecessors, (8553), 187 states have call successors, (8553) [2023-04-01 23:55:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46922 states to 46922 states and 70830 transitions. [2023-04-01 23:55:04,464 INFO L78 Accepts]: Start accepts. Automaton has 46922 states and 70830 transitions. Word has length 188 [2023-04-01 23:55:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:55:04,465 INFO L495 AbstractCegarLoop]: Abstraction has 46922 states and 70830 transitions. [2023-04-01 23:55:04,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 46922 states and 70830 transitions. [2023-04-01 23:55:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2023-04-01 23:55:04,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:04,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:55:04,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 23:55:04,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:04,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:04,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:04,680 INFO L85 PathProgramCache]: Analyzing trace with hash -454260313, now seen corresponding path program 1 times [2023-04-01 23:55:04,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:04,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995413249] [2023-04-01 23:55:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:04,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:05,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:55:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:05,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2023-04-01 23:55:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 56 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:55:05,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:05,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995413249] [2023-04-01 23:55:05,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995413249] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:55:05,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43179403] [2023-04-01 23:55:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:05,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:05,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:55:05,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:55:05,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:55:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:05,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:55:06,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:55:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 23:55:06,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:55:06,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43179403] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:55:06,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:55:06,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-04-01 23:55:06,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948335371] [2023-04-01 23:55:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:55:06,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:55:06,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:55:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:55:06,355 INFO L87 Difference]: Start difference. First operand 46922 states and 70830 transitions. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 4 states have internal predecessors, (323), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:14,077 INFO L93 Difference]: Finished difference Result 112519 states and 174006 transitions. [2023-04-01 23:55:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:55:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 4 states have internal predecessors, (323), 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 358 [2023-04-01 23:55:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:14,442 INFO L225 Difference]: With dead ends: 112519 [2023-04-01 23:55:14,443 INFO L226 Difference]: Without dead ends: 65603 [2023-04-01 23:55:14,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:55:14,502 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 4843 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 7082 mSolverCounterSat, 3022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4843 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 10104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3022 IncrementalHoareTripleChecker+Valid, 7082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:14,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4843 Valid, 1109 Invalid, 10104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3022 Valid, 7082 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-04-01 23:55:14,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65603 states. [2023-04-01 23:55:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65603 to 63457. [2023-04-01 23:55:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63457 states, 61389 states have (on average 1.2556158269396798) internal successors, (77081), 61746 states have internal predecessors, (77081), 254 states have call successors, (254), 254 states have call predecessors, (254), 1813 states have return successors, (11350), 1456 states have call predecessors, (11350), 253 states have call successors, (11350) [2023-04-01 23:55:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63457 states to 63457 states and 88685 transitions. [2023-04-01 23:55:16,364 INFO L78 Accepts]: Start accepts. Automaton has 63457 states and 88685 transitions. Word has length 358 [2023-04-01 23:55:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:55:16,364 INFO L495 AbstractCegarLoop]: Abstraction has 63457 states and 88685 transitions. [2023-04-01 23:55:16,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 4 states have internal predecessors, (323), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 63457 states and 88685 transitions. [2023-04-01 23:55:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-04-01 23:55:16,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:16,373 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:55:16,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:55:16,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:16,579 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:16,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash -131310902, now seen corresponding path program 1 times [2023-04-01 23:55:16,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:16,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108152953] [2023-04-01 23:55:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:16,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:17,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:17,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:55:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:17,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2023-04-01 23:55:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 313 [2023-04-01 23:55:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 84 proven. 206 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-04-01 23:55:17,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:17,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108152953] [2023-04-01 23:55:17,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108152953] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:55:17,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527790218] [2023-04-01 23:55:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:17,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:17,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:55:17,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:55:17,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:55:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:17,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:55:17,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:55:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-04-01 23:55:17,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:55:17,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527790218] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:55:17,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:55:17,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:55:17,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788637031] [2023-04-01 23:55:17,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:55:17,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:55:17,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:17,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:55:17,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:55:17,864 INFO L87 Difference]: Start difference. First operand 63457 states and 88685 transitions. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 4 states have internal predecessors, (344), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:27,429 INFO L93 Difference]: Finished difference Result 149615 states and 218594 transitions. [2023-04-01 23:55:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:55:27,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 4 states have internal predecessors, (344), 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 467 [2023-04-01 23:55:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:27,798 INFO L225 Difference]: With dead ends: 149615 [2023-04-01 23:55:27,798 INFO L226 Difference]: Without dead ends: 86164 [2023-04-01 23:55:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:55:27,867 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 4507 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 9878 mSolverCounterSat, 1379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4507 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 11257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1379 IncrementalHoareTripleChecker+Valid, 9878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:27,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4507 Valid, 1272 Invalid, 11257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1379 Valid, 9878 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-04-01 23:55:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86164 states. [2023-04-01 23:55:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86164 to 85120. [2023-04-01 23:55:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85120 states, 82075 states have (on average 1.2218702406335669) internal successors, (100285), 82654 states have internal predecessors, (100285), 338 states have call successors, (338), 338 states have call predecessors, (338), 2706 states have return successors, (18055), 2127 states have call predecessors, (18055), 337 states have call successors, (18055) [2023-04-01 23:55:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85120 states to 85120 states and 118678 transitions. [2023-04-01 23:55:29,819 INFO L78 Accepts]: Start accepts. Automaton has 85120 states and 118678 transitions. Word has length 467 [2023-04-01 23:55:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:55:29,820 INFO L495 AbstractCegarLoop]: Abstraction has 85120 states and 118678 transitions. [2023-04-01 23:55:29,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 4 states have internal predecessors, (344), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 85120 states and 118678 transitions. [2023-04-01 23:55:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-04-01 23:55:29,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:29,853 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:55:29,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 23:55:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:30,054 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:30,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1718928564, now seen corresponding path program 1 times [2023-04-01 23:55:30,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:30,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221057542] [2023-04-01 23:55:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:30,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:30,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:55:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:30,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2023-04-01 23:55:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:30,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 331 [2023-04-01 23:55:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 84 proven. 206 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-04-01 23:55:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:30,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221057542] [2023-04-01 23:55:30,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221057542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:55:30,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030184976] [2023-04-01 23:55:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:30,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:30,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:55:30,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:55:30,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:55:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:31,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:55:31,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:55:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-04-01 23:55:31,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:55:31,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030184976] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:55:31,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:55:31,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-04-01 23:55:31,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935089527] [2023-04-01 23:55:31,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:55:31,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:55:31,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:55:31,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:55:31,425 INFO L87 Difference]: Start difference. First operand 85120 states and 118678 transitions. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 4 states have internal predecessors, (362), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:42,062 INFO L93 Difference]: Finished difference Result 246981 states and 365436 transitions. [2023-04-01 23:55:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:55:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 4 states have internal predecessors, (362), 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 485 [2023-04-01 23:55:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:42,957 INFO L225 Difference]: With dead ends: 246981 [2023-04-01 23:55:42,957 INFO L226 Difference]: Without dead ends: 161867 [2023-04-01 23:55:43,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:55:43,064 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 4815 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 8849 mSolverCounterSat, 2762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4815 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 11611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2762 IncrementalHoareTripleChecker+Valid, 8849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:43,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4815 Valid, 895 Invalid, 11611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2762 Valid, 8849 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-04-01 23:55:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161867 states. [2023-04-01 23:55:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161867 to 157376. [2023-04-01 23:55:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157376 states, 152239 states have (on average 1.158658425239262) internal successors, (176393), 153218 states have internal predecessors, (176393), 632 states have call successors, (632), 632 states have call predecessors, (632), 4504 states have return successors, (36238), 3525 states have call predecessors, (36238), 631 states have call successors, (36238) [2023-04-01 23:55:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157376 states to 157376 states and 213263 transitions. [2023-04-01 23:55:46,330 INFO L78 Accepts]: Start accepts. Automaton has 157376 states and 213263 transitions. Word has length 485 [2023-04-01 23:55:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:55:46,330 INFO L495 AbstractCegarLoop]: Abstraction has 157376 states and 213263 transitions. [2023-04-01 23:55:46,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 4 states have internal predecessors, (362), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:55:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 157376 states and 213263 transitions. [2023-04-01 23:55:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2023-04-01 23:55:46,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:46,522 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:55:46,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 23:55:46,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:46,731 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:46,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2033981306, now seen corresponding path program 1 times [2023-04-01 23:55:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:46,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118452451] [2023-04-01 23:55:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:46,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:47,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:47,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:55:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:47,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:55:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:48,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:55:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:48,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2023-04-01 23:55:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 724 [2023-04-01 23:55:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 175 proven. 85 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 23:55:48,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:48,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118452451] [2023-04-01 23:55:48,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118452451] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:55:48,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312763138] [2023-04-01 23:55:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:48,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:55:48,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:55:48,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:55:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:48,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:55:48,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:55:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 315 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 23:55:48,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:55:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 176 proven. 86 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:55:49,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312763138] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:55:49,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:55:49,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 23:55:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211403874] [2023-04-01 23:55:49,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:55:49,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:55:49,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:55:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:55:49,100 INFO L87 Difference]: Start difference. First operand 157376 states and 213263 transitions. Second operand has 13 states, 13 states have (on average 76.15384615384616) internal successors, (990), 11 states have internal predecessors, (990), 5 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 23:56:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:56:22,557 INFO L93 Difference]: Finished difference Result 367007 states and 522772 transitions. [2023-04-01 23:56:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-04-01 23:56:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 76.15384615384616) internal successors, (990), 11 states have internal predecessors, (990), 5 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 837 [2023-04-01 23:56:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:56:23,489 INFO L225 Difference]: With dead ends: 367007 [2023-04-01 23:56:23,490 INFO L226 Difference]: Without dead ends: 206749 [2023-04-01 23:56:23,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1812 GetRequests, 1740 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=819, Invalid=4583, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 23:56:23,660 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 10361 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 48042 mSolverCounterSat, 5131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10363 SdHoareTripleChecker+Valid, 2933 SdHoareTripleChecker+Invalid, 53173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5131 IncrementalHoareTripleChecker+Valid, 48042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:56:23,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10363 Valid, 2933 Invalid, 53173 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5131 Valid, 48042 Invalid, 0 Unknown, 0 Unchecked, 29.1s Time] [2023-04-01 23:56:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206749 states. [2023-04-01 23:56:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206749 to 199548. [2023-04-01 23:56:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199548 states, 192870 states have (on average 1.0930212059936746) internal successors, (210811), 194190 states have internal predecessors, (210811), 800 states have call successors, (800), 800 states have call predecessors, (800), 5877 states have return successors, (35918), 4557 states have call predecessors, (35918), 799 states have call successors, (35918) [2023-04-01 23:56:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199548 states to 199548 states and 247529 transitions. [2023-04-01 23:56:27,734 INFO L78 Accepts]: Start accepts. Automaton has 199548 states and 247529 transitions. Word has length 837 [2023-04-01 23:56:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:56:27,735 INFO L495 AbstractCegarLoop]: Abstraction has 199548 states and 247529 transitions. [2023-04-01 23:56:27,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.15384615384616) internal successors, (990), 11 states have internal predecessors, (990), 5 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 23:56:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 199548 states and 247529 transitions. [2023-04-01 23:56:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2023-04-01 23:56:27,755 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:27,755 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:56:27,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:56:27,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:27,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:27,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1983524484, now seen corresponding path program 1 times [2023-04-01 23:56:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:27,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270816766] [2023-04-01 23:56:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:27,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:29,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:29,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:56:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:56:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:56:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:56:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2023-04-01 23:56:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 453 proven. 11 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-04-01 23:56:30,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:56:30,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270816766] [2023-04-01 23:56:30,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270816766] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:56:30,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987791096] [2023-04-01 23:56:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:30,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:30,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:56:30,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:56:30,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:56:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:56:30,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:56:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 605 proven. 2 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-04-01 23:56:30,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:56:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 299 proven. 89 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-04-01 23:56:31,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987791096] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:56:31,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:56:31,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2023-04-01 23:56:31,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734269749] [2023-04-01 23:56:31,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:56:31,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 23:56:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:56:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 23:56:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-01 23:56:31,249 INFO L87 Difference]: Start difference. First operand 199548 states and 247529 transitions. Second operand has 17 states, 17 states have (on average 55.294117647058826) internal successors, (940), 15 states have internal predecessors, (940), 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)