/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:21:45,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:21:45,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:21:45,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:21:45,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:21:45,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:21:45,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:21:45,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:21:45,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:21:45,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:21:45,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:21:45,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:21:45,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:21:45,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:21:45,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:21:45,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:21:45,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:21:45,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:21:45,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:21:45,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:21:45,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:21:45,435 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:21:45,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:21:45,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:21:45,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:21:45,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:21:45,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:21:45,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:21:45,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:21:45,438 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:21:45,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:21:45,439 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:21:45,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:21:45,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:21:45,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:21:45,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:21:45,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:21:45,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:21:45,440 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:21:45,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:21:45,441 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:21:45,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:21:45,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:21:45,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:21:45,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:21:45,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:21:45,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:21:45,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:21:45,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:21:45,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:21:45,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:21:45,443 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:21:45,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:21:45,443 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:21:45,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:21:45,444 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:21:45,444 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:21:45,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:21:45,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:21:45,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:21:45,724 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:21:45,725 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:21:45,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label49.c [2023-03-30 23:21:46,956 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:21:47,391 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:21:47,392 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label49.c [2023-03-30 23:21:47,427 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc068c6c6/274507d3723047a4a824375e0eaac099/FLAG17f7ca5f2 [2023-03-30 23:21:47,443 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc068c6c6/274507d3723047a4a824375e0eaac099 [2023-03-30 23:21:47,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:21:47,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:21:47,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:21:47,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:21:47,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:21:47,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:21:47" (1/1) ... [2023-03-30 23:21:47,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301d0c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:47, skipping insertion in model container [2023-03-30 23:21:47,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:21:47" (1/1) ... [2023-03-30 23:21:47,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:21:47,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:21:47,826 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label49.c[5366,5379] [2023-03-30 23:21:48,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:21:48,574 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:21:48,598 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label49.c[5366,5379] [2023-03-30 23:21:48,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:21:48,977 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:21:48,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48 WrapperNode [2023-03-30 23:21:48,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:21:48,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:21:48,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:21:48,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:21:48,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:48,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:49,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:49,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:49,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:49,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:49,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:49,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:49,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:21:49,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:21:49,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:21:49,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:21:49,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (1/1) ... [2023-03-30 23:21:49,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:21:49,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:49,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:21:49,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:21:49,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:21:49,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:21:49,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:21:49,311 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:21:49,311 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:21:49,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:21:49,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:21:49,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:21:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:21:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:21:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:21:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:21:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:21:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:21:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:21:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:21:49,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:21:49,400 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:21:49,402 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:21:53,321 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:21:53,365 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:21:53,365 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:21:53,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:21:53 BoogieIcfgContainer [2023-03-30 23:21:53,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:21:53,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:21:53,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:21:53,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:21:53,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:21:47" (1/3) ... [2023-03-30 23:21:53,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b839b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:21:53, skipping insertion in model container [2023-03-30 23:21:53,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:48" (2/3) ... [2023-03-30 23:21:53,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b839b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:21:53, skipping insertion in model container [2023-03-30 23:21:53,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:21:53" (3/3) ... [2023-03-30 23:21:53,376 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label49.c [2023-03-30 23:21:53,403 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:21:53,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:21:53,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:21:53,481 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;@731dc73c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:21:53,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:21:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:21:53,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-30 23:21:53,504 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:53,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:53,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:53,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1719793165, now seen corresponding path program 1 times [2023-03-30 23:21:53,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881624610] [2023-03-30 23:21:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:54,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:54,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:54,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881624610] [2023-03-30 23:21:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881624610] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:54,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:21:54,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:21:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240349376] [2023-03-30 23:21:54,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:54,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:21:54,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:21:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:21:54,093 INFO L87 Difference]: Start difference. First operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:22:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:01,200 INFO L93 Difference]: Finished difference Result 3253 states and 6293 transitions. [2023-03-30 23:22:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:22:01,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-03-30 23:22:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:01,241 INFO L225 Difference]: With dead ends: 3253 [2023-03-30 23:22:01,242 INFO L226 Difference]: Without dead ends: 2346 [2023-03-30 23:22:01,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:22:01,252 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4999 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 1969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4999 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 6288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1969 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:22:01,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4999 Valid, 58 Invalid, 6288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1969 Valid, 4319 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-03-30 23:22:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2023-03-30 23:22:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2331. [2023-03-30 23:22:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2295 states have (on average 1.6435729847494553) internal successors, (3772), 2297 states have internal predecessors, (3772), 14 states have call successors, (14), 14 states have call predecessors, (14), 21 states have return successors, (48), 19 states have call predecessors, (48), 13 states have call successors, (48) [2023-03-30 23:22:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3834 transitions. [2023-03-30 23:22:01,423 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3834 transitions. Word has length 48 [2023-03-30 23:22:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:22:01,425 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 3834 transitions. [2023-03-30 23:22:01,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:22:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3834 transitions. [2023-03-30 23:22:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-03-30 23:22:01,437 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:22:01,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:22:01,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:22:01,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:22:01,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:22:01,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1711268368, now seen corresponding path program 1 times [2023-03-30 23:22:01,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:22:01,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395690760] [2023-03-30 23:22:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:01,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:22:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:01,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:22:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:01,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:22:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:22:01,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:22:01,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395690760] [2023-03-30 23:22:01,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395690760] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:22:01,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:22:01,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:22:01,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525101363] [2023-03-30 23:22:01,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:22:01,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:22:01,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:22:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:22:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:22:01,811 INFO L87 Difference]: Start difference. First operand 2331 states and 3834 transitions. Second operand has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:22:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:09,155 INFO L93 Difference]: Finished difference Result 9466 states and 16032 transitions. [2023-03-30 23:22:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-30 23:22:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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 126 [2023-03-30 23:22:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:09,191 INFO L225 Difference]: With dead ends: 9466 [2023-03-30 23:22:09,192 INFO L226 Difference]: Without dead ends: 7141 [2023-03-30 23:22:09,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:22:09,200 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4325 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 6937 mSolverCounterSat, 2141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4325 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 9078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2141 IncrementalHoareTripleChecker+Valid, 6937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:22:09,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4325 Valid, 129 Invalid, 9078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2141 Valid, 6937 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-03-30 23:22:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2023-03-30 23:22:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 7092. [2023-03-30 23:22:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7092 states, 6949 states have (on average 1.4459634479781263) internal successors, (10048), 6969 states have internal predecessors, (10048), 38 states have call successors, (38), 38 states have call predecessors, (38), 104 states have return successors, (507), 84 states have call predecessors, (507), 37 states have call successors, (507) [2023-03-30 23:22:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7092 states to 7092 states and 10593 transitions. [2023-03-30 23:22:09,393 INFO L78 Accepts]: Start accepts. Automaton has 7092 states and 10593 transitions. Word has length 126 [2023-03-30 23:22:09,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:22:09,395 INFO L495 AbstractCegarLoop]: Abstraction has 7092 states and 10593 transitions. [2023-03-30 23:22:09,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:22:09,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7092 states and 10593 transitions. [2023-03-30 23:22:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-03-30 23:22:09,400 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:22:09,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:22:09,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:22:09,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:22:09,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:22:09,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1354638576, now seen corresponding path program 1 times [2023-03-30 23:22:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:22:09,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967729033] [2023-03-30 23:22:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:09,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:22:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:09,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:22:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:22:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:22:09,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:22:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967729033] [2023-03-30 23:22:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967729033] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:22:09,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:22:09,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:22:09,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883483917] [2023-03-30 23:22:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:22:09,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:22:09,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:22:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:22:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:22:09,836 INFO L87 Difference]: Start difference. First operand 7092 states and 10593 transitions. Second operand has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 5 states have internal predecessors, (136), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:22:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:14,100 INFO L93 Difference]: Finished difference Result 16669 states and 24832 transitions. [2023-03-30 23:22:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:22:14,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 5 states have internal predecessors, (136), 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 142 [2023-03-30 23:22:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:14,140 INFO L225 Difference]: With dead ends: 16669 [2023-03-30 23:22:14,140 INFO L226 Difference]: Without dead ends: 9583 [2023-03-30 23:22:14,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:22:14,156 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6381 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4734 mSolverCounterSat, 1020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6381 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 5754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1020 IncrementalHoareTripleChecker+Valid, 4734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:22:14,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6381 Valid, 122 Invalid, 5754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1020 Valid, 4734 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-03-30 23:22:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9583 states. [2023-03-30 23:22:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9583 to 9520. [2023-03-30 23:22:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9520 states, 9305 states have (on average 1.3279957012358947) internal successors, (12357), 9342 states have internal predecessors, (12357), 50 states have call successors, (50), 50 states have call predecessors, (50), 164 states have return successors, (788), 127 states have call predecessors, (788), 49 states have call successors, (788) [2023-03-30 23:22:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9520 states to 9520 states and 13195 transitions. [2023-03-30 23:22:14,375 INFO L78 Accepts]: Start accepts. Automaton has 9520 states and 13195 transitions. Word has length 142 [2023-03-30 23:22:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:22:14,376 INFO L495 AbstractCegarLoop]: Abstraction has 9520 states and 13195 transitions. [2023-03-30 23:22:14,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 5 states have internal predecessors, (136), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:22:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 9520 states and 13195 transitions. [2023-03-30 23:22:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-03-30 23:22:14,378 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:22:14,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:22:14,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:22:14,379 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:22:14,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:22:14,379 INFO L85 PathProgramCache]: Analyzing trace with hash 768678095, now seen corresponding path program 1 times [2023-03-30 23:22:14,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:22:14,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986211761] [2023-03-30 23:22:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:22:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:14,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:22:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:14,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:22:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:22:14,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:22:14,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986211761] [2023-03-30 23:22:14,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986211761] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:22:14,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:22:14,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:22:14,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136767084] [2023-03-30 23:22:14,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:22:14,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:22:14,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:22:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:22:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:22:14,750 INFO L87 Difference]: Start difference. First operand 9520 states and 13195 transitions. Second operand has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:22:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:20,668 INFO L93 Difference]: Finished difference Result 29191 states and 42781 transitions. [2023-03-30 23:22:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:22:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 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 151 [2023-03-30 23:22:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:20,745 INFO L225 Difference]: With dead ends: 29191 [2023-03-30 23:22:20,745 INFO L226 Difference]: Without dead ends: 19677 [2023-03-30 23:22:20,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:22:20,773 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2531 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 6254 mSolverCounterSat, 1140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 7394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1140 IncrementalHoareTripleChecker+Valid, 6254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:22:20,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2531 Valid, 151 Invalid, 7394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1140 Valid, 6254 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-03-30 23:22:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19677 states. [2023-03-30 23:22:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19677 to 19456. [2023-03-30 23:22:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19456 states, 18864 states have (on average 1.2163910093299406) internal successors, (22946), 19012 states have internal predecessors, (22946), 98 states have call successors, (98), 98 states have call predecessors, (98), 493 states have return successors, (2765), 345 states have call predecessors, (2765), 97 states have call successors, (2765) [2023-03-30 23:22:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19456 states to 19456 states and 25809 transitions. [2023-03-30 23:22:21,276 INFO L78 Accepts]: Start accepts. Automaton has 19456 states and 25809 transitions. Word has length 151 [2023-03-30 23:22:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:22:21,277 INFO L495 AbstractCegarLoop]: Abstraction has 19456 states and 25809 transitions. [2023-03-30 23:22:21,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:22:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 19456 states and 25809 transitions. [2023-03-30 23:22:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-03-30 23:22:21,282 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:22:21,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:22:21,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 23:22:21,282 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:22:21,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:22:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash 407600442, now seen corresponding path program 1 times [2023-03-30 23:22:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:22:21,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435543129] [2023-03-30 23:22:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:22:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:21,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:22:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:21,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:22:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:21,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-03-30 23:22:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-03-30 23:22:21,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:22:21,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435543129] [2023-03-30 23:22:21,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435543129] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:22:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941914823] [2023-03-30 23:22:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:22:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:22:21,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:22:21,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:22:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:21,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 23:22:22,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:22:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-03-30 23:22:22,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:22:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-03-30 23:22:22,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941914823] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:22:22,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:22:22,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2023-03-30 23:22:22,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96452339] [2023-03-30 23:22:22,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:22:22,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:22:22,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:22:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:22:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:22:22,832 INFO L87 Difference]: Start difference. First operand 19456 states and 25809 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:22:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:26,944 INFO L93 Difference]: Finished difference Result 54706 states and 74241 transitions. [2023-03-30 23:22:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:22:26,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 209 [2023-03-30 23:22:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:27,069 INFO L225 Difference]: With dead ends: 54706 [2023-03-30 23:22:27,070 INFO L226 Difference]: Without dead ends: 35256 [2023-03-30 23:22:27,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:22:27,120 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2963 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3409 mSolverCounterSat, 1365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2963 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 4774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1365 IncrementalHoareTripleChecker+Valid, 3409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:22:27,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2963 Valid, 95 Invalid, 4774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1365 Valid, 3409 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-30 23:22:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2023-03-30 23:22:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 29048. [2023-03-30 23:22:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29048 states, 28208 states have (on average 1.1869682359614293) internal successors, (33482), 28424 states have internal predecessors, (33482), 146 states have call successors, (146), 146 states have call predecessors, (146), 693 states have return successors, (4350), 477 states have call predecessors, (4350), 145 states have call successors, (4350) [2023-03-30 23:22:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29048 states to 29048 states and 37978 transitions. [2023-03-30 23:22:28,006 INFO L78 Accepts]: Start accepts. Automaton has 29048 states and 37978 transitions. Word has length 209 [2023-03-30 23:22:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:22:28,006 INFO L495 AbstractCegarLoop]: Abstraction has 29048 states and 37978 transitions. [2023-03-30 23:22:28,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:22:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 29048 states and 37978 transitions. [2023-03-30 23:22:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-03-30 23:22:28,010 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:22:28,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:22:28,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:22:28,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:22:28,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:22:28,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:22:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash 134738036, now seen corresponding path program 1 times [2023-03-30 23:22:28,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:22:28,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186524859] [2023-03-30 23:22:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:22:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:28,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:22:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:28,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:22:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:28,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:22:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-03-30 23:22:28,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:22:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186524859] [2023-03-30 23:22:28,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186524859] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:22:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721542320] [2023-03-30 23:22:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:22:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:22:28,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:22:28,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:22:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:28,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:22:28,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:22:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-03-30 23:22:28,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:22:28,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721542320] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:22:28,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:22:28,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:22:28,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588987460] [2023-03-30 23:22:28,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:22:28,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:22:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:22:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:22:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:22:28,730 INFO L87 Difference]: Start difference. First operand 29048 states and 37978 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:22:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:32,530 INFO L93 Difference]: Finished difference Result 81456 states and 109425 transitions. [2023-03-30 23:22:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:22:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 269 [2023-03-30 23:22:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:32,709 INFO L225 Difference]: With dead ends: 81456 [2023-03-30 23:22:32,709 INFO L226 Difference]: Without dead ends: 52414 [2023-03-30 23:22:32,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:22:32,759 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 783 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:22:32,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 210 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:22:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52414 states. [2023-03-30 23:22:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52414 to 43869. [2023-03-30 23:22:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43869 states, 42777 states have (on average 1.2061855670103092) internal successors, (51597), 43045 states have internal predecessors, (51597), 222 states have call successors, (222), 222 states have call predecessors, (222), 869 states have return successors, (8357), 601 states have call predecessors, (8357), 221 states have call successors, (8357) [2023-03-30 23:22:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43869 states to 43869 states and 60176 transitions. [2023-03-30 23:22:33,894 INFO L78 Accepts]: Start accepts. Automaton has 43869 states and 60176 transitions. Word has length 269 [2023-03-30 23:22:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:22:33,894 INFO L495 AbstractCegarLoop]: Abstraction has 43869 states and 60176 transitions. [2023-03-30 23:22:33,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:22:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 43869 states and 60176 transitions. [2023-03-30 23:22:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-03-30 23:22:33,899 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:22:33,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:22:33,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:22:34,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-30 23:22:34,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:22:34,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:22:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash 875191297, now seen corresponding path program 1 times [2023-03-30 23:22:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:22:34,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109374169] [2023-03-30 23:22:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:22:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:34,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:22:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:34,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:22:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:34,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-03-30 23:22:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 80 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-03-30 23:22:34,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:22:34,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109374169] [2023-03-30 23:22:34,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109374169] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:22:34,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647868470] [2023-03-30 23:22:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:34,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:22:34,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:22:34,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:22:34,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:22:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:35,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:22:35,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:22:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 23:22:35,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:22:35,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647868470] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:22:35,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:22:35,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2023-03-30 23:22:35,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490960669] [2023-03-30 23:22:35,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:22:35,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:22:35,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:22:35,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:22:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:22:35,168 INFO L87 Difference]: Start difference. First operand 43869 states and 60176 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:22:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:37,926 INFO L93 Difference]: Finished difference Result 87732 states and 120761 transitions. [2023-03-30 23:22:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:22:37,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 296 [2023-03-30 23:22:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted.