/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/Problem03_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:45:46,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:45:46,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:45:46,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:45:46,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:45:46,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:45:46,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:45:46,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:45:46,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:45:46,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:45:46,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:45:46,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:45:46,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:45:46,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:45:46,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:45:46,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:45:46,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:45:46,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:45:46,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:45:46,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:45:46,662 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 22:45:46,689 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:45:46,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:45:46,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:45:46,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:45:46,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:45:46,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:45:46,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:45:46,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:45:46,693 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:45:46,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:45:46,694 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:45:46,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:45:46,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:45:46,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:45:46,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:45:46,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:45:46,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:45:46,694 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:45:46,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:45:46,695 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:45:46,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:45:46,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:45:46,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:45:46,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:45:46,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:45:46,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:45:46,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:45:46,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:45:46,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:45:46,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:45:46,696 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:45:46,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:45:46,697 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:45:46,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:45:46,697 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:45:46,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:45:46,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:45:46,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:45:46,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:45:46,964 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:45:46,964 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:45:46,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2023-03-30 22:45:48,154 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:45:48,497 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:45:48,498 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2023-03-30 22:45:48,511 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd3ddc68/2ff6323bbf7e442b83bb28bc7449b453/FLAG4ba94f2ac [2023-03-30 22:45:48,522 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd3ddc68/2ff6323bbf7e442b83bb28bc7449b453 [2023-03-30 22:45:48,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:45:48,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:45:48,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:45:48,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:45:48,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:45:48,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:45:48" (1/1) ... [2023-03-30 22:45:48,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636faed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:48, skipping insertion in model container [2023-03-30 22:45:48,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:45:48" (1/1) ... [2023-03-30 22:45:48,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:45:48,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:45:49,034 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/Problem03_label28.c[54731,54744] [2023-03-30 22:45:49,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:45:49,086 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:45:49,319 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/Problem03_label28.c[54731,54744] [2023-03-30 22:45:49,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:45:49,352 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:45:49,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49 WrapperNode [2023-03-30 22:45:49,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:45:49,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:45:49,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:45:49,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:45:49,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,500 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:45:49,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:45:49,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:45:49,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:45:49,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (1/1) ... [2023-03-30 22:45:49,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:45:49,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:49,558 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 22:45:49,570 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 22:45:49,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:45:49,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:45:49,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:45:49,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:45:49,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:45:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:45:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:45:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:45:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:45:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:45:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:45:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:45:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:45:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:45:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:45:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:45:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:45:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:45:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:45:49,713 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:45:49,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:45:51,210 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:45:51,224 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:45:51,224 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:45:51,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:45:51 BoogieIcfgContainer [2023-03-30 22:45:51,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:45:51,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:45:51,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:45:51,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:45:51,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:45:48" (1/3) ... [2023-03-30 22:45:51,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c41d156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:45:51, skipping insertion in model container [2023-03-30 22:45:51,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:49" (2/3) ... [2023-03-30 22:45:51,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c41d156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:45:51, skipping insertion in model container [2023-03-30 22:45:51,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:45:51" (3/3) ... [2023-03-30 22:45:51,233 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label28.c [2023-03-30 22:45:51,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:45:51,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:45:51,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:45:51,298 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;@1d18867c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:45:51,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:45:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:45:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-03-30 22:45:51,317 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:51,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:45:51,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:51,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash 42377554, now seen corresponding path program 1 times [2023-03-30 22:45:51,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:51,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891495892] [2023-03-30 22:45:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:51,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:52,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:52,585 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 22:45:52,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:52,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891495892] [2023-03-30 22:45:52,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891495892] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:52,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:52,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:45:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511767863] [2023-03-30 22:45:52,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:52,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:45:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:45:52,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:45:52,631 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 22:45:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:54,609 INFO L93 Difference]: Finished difference Result 839 states and 1485 transitions. [2023-03-30 22:45:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:45:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 158 [2023-03-30 22:45:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:54,622 INFO L225 Difference]: With dead ends: 839 [2023-03-30 22:45:54,623 INFO L226 Difference]: Without dead ends: 464 [2023-03-30 22:45:54,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:45:54,631 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 626 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:54,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 53 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 22:45:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-03-30 22:45:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2023-03-30 22:45:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 450 states have (on average 1.4222222222222223) internal successors, (640), 452 states have internal predecessors, (640), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 22:45:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 651 transitions. [2023-03-30 22:45:54,692 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 651 transitions. Word has length 158 [2023-03-30 22:45:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:54,693 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 651 transitions. [2023-03-30 22:45:54,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 22:45:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 651 transitions. [2023-03-30 22:45:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-03-30 22:45:54,696 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:54,697 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:45:54,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:45:54,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:54,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:54,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1648209999, now seen corresponding path program 1 times [2023-03-30 22:45:54,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:54,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686972229] [2023-03-30 22:45:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:54,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:55,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:55,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:55,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:55,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686972229] [2023-03-30 22:45:55,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686972229] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:55,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:55,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:45:55,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114221293] [2023-03-30 22:45:55,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:55,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:45:55,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:45:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:55,272 INFO L87 Difference]: Start difference. First operand 460 states and 651 transitions. Second operand has 7 states, 6 states have (on average 27.333333333333332) internal successors, (164), 4 states have internal predecessors, (164), 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 22:45:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:57,064 INFO L93 Difference]: Finished difference Result 1392 states and 2002 transitions. [2023-03-30 22:45:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:45:57,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 27.333333333333332) internal successors, (164), 4 states have internal predecessors, (164), 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 170 [2023-03-30 22:45:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:57,071 INFO L225 Difference]: With dead ends: 1392 [2023-03-30 22:45:57,072 INFO L226 Difference]: Without dead ends: 938 [2023-03-30 22:45:57,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:57,079 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1223 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:57,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 142 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 22:45:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2023-03-30 22:45:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 916. [2023-03-30 22:45:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 896 states have (on average 1.390625) internal successors, (1246), 904 states have internal predecessors, (1246), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-03-30 22:45:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1279 transitions. [2023-03-30 22:45:57,145 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1279 transitions. Word has length 170 [2023-03-30 22:45:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:57,150 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1279 transitions. [2023-03-30 22:45:57,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 27.333333333333332) internal successors, (164), 4 states have internal predecessors, (164), 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 22:45:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1279 transitions. [2023-03-30 22:45:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-03-30 22:45:57,158 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:57,158 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:45:57,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:45:57,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:57,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:57,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1701721498, now seen corresponding path program 1 times [2023-03-30 22:45:57,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:57,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810392089] [2023-03-30 22:45:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:57,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:57,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:57,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:57,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:57,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810392089] [2023-03-30 22:45:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810392089] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:57,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717758772] [2023-03-30 22:45:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:57,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:57,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:57,775 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 22:45:57,796 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 22:45:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:58,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:45:58,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:58,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:45:58,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717758772] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:58,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:45:58,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:45:58,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129887540] [2023-03-30 22:45:58,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:58,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:45:58,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:58,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:45:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:45:58,346 INFO L87 Difference]: Start difference. First operand 916 states and 1279 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:45:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:59,077 INFO L93 Difference]: Finished difference Result 2691 states and 3803 transitions. [2023-03-30 22:45:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:45:59,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 179 [2023-03-30 22:45:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:59,087 INFO L225 Difference]: With dead ends: 2691 [2023-03-30 22:45:59,087 INFO L226 Difference]: Without dead ends: 1781 [2023-03-30 22:45:59,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:45:59,092 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 133 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:59,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 387 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:45:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2023-03-30 22:45:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1778. [2023-03-30 22:45:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1743 states have (on average 1.3057946069994262) internal successors, (2276), 1758 states have internal predecessors, (2276), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (80), 9 states have call predecessors, (80), 9 states have call successors, (80) [2023-03-30 22:45:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2366 transitions. [2023-03-30 22:45:59,156 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2366 transitions. Word has length 179 [2023-03-30 22:45:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:59,157 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 2366 transitions. [2023-03-30 22:45:59,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:45:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2366 transitions. [2023-03-30 22:45:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-03-30 22:45:59,163 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:59,163 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-30 22:45:59,174 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 22:45:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:59,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:59,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1484185904, now seen corresponding path program 1 times [2023-03-30 22:45:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980589738] [2023-03-30 22:45:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:59,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:59,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:59,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:45:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:45:59,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:59,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980589738] [2023-03-30 22:45:59,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980589738] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:59,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062675273] [2023-03-30 22:45:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:59,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:59,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:59,964 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 22:45:59,989 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 22:46:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:00,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:46:00,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:46:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:46:00,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:46:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:46:00,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062675273] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:46:00,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:46:00,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-03-30 22:46:00,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347417206] [2023-03-30 22:46:00,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:46:00,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 22:46:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:46:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 22:46:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-03-30 22:46:00,392 INFO L87 Difference]: Start difference. First operand 1778 states and 2366 transitions. Second operand has 13 states, 13 states have (on average 15.615384615384615) internal successors, (203), 11 states have internal predecessors, (203), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:46:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:46:03,697 INFO L93 Difference]: Finished difference Result 4525 states and 6409 transitions. [2023-03-30 22:46:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:46:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.615384615384615) internal successors, (203), 11 states have internal predecessors, (203), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 189 [2023-03-30 22:46:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:46:03,714 INFO L225 Difference]: With dead ends: 4525 [2023-03-30 22:46:03,714 INFO L226 Difference]: Without dead ends: 2753 [2023-03-30 22:46:03,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2023-03-30 22:46:03,721 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1536 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 2898 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:46:03,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1536 Valid, 231 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2898 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 22:46:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2023-03-30 22:46:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2709. [2023-03-30 22:46:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2618 states have (on average 1.26279602750191) internal successors, (3306), 2681 states have internal predecessors, (3306), 14 states have call successors, (14), 14 states have call predecessors, (14), 76 states have return successors, (233), 13 states have call predecessors, (233), 13 states have call successors, (233) [2023-03-30 22:46:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 3553 transitions. [2023-03-30 22:46:03,826 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 3553 transitions. Word has length 189 [2023-03-30 22:46:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:46:03,827 INFO L495 AbstractCegarLoop]: Abstraction has 2709 states and 3553 transitions. [2023-03-30 22:46:03,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.615384615384615) internal successors, (203), 11 states have internal predecessors, (203), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:46:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 3553 transitions. [2023-03-30 22:46:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-03-30 22:46:03,838 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:46:03,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:46:03,848 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 22:46:04,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 22:46:04,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:46:04,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:46:04,046 INFO L85 PathProgramCache]: Analyzing trace with hash 770661570, now seen corresponding path program 1 times [2023-03-30 22:46:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:46:04,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257061274] [2023-03-30 22:46:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:46:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:04,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:46:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:04,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:46:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:46:04,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:46:04,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257061274] [2023-03-30 22:46:04,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257061274] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:46:04,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065372019] [2023-03-30 22:46:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:04,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:04,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:46:04,585 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 22:46:04,588 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 22:46:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:04,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:46:04,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:46:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:46:04,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:46:04,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065372019] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:46:04,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:46:04,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:46:04,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304626719] [2023-03-30 22:46:04,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:46:04,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:46:04,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:46:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:46:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:46:04,967 INFO L87 Difference]: Start difference. First operand 2709 states and 3553 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:46:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:46:05,744 INFO L93 Difference]: Finished difference Result 8006 states and 10793 transitions. [2023-03-30 22:46:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:46:05,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 190 [2023-03-30 22:46:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:46:05,768 INFO L225 Difference]: With dead ends: 8006 [2023-03-30 22:46:05,768 INFO L226 Difference]: Without dead ends: 5303 [2023-03-30 22:46:05,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:46:05,777 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 92 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:46:05,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 388 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:46:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2023-03-30 22:46:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5267. [2023-03-30 22:46:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5267 states, 5115 states have (on average 1.2465298142717498) internal successors, (6376), 5215 states have internal predecessors, (6376), 26 states have call successors, (26), 26 states have call predecessors, (26), 125 states have return successors, (636), 25 states have call predecessors, (636), 25 states have call successors, (636) [2023-03-30 22:46:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5267 states to 5267 states and 7038 transitions. [2023-03-30 22:46:05,986 INFO L78 Accepts]: Start accepts. Automaton has 5267 states and 7038 transitions. Word has length 190 [2023-03-30 22:46:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:46:05,987 INFO L495 AbstractCegarLoop]: Abstraction has 5267 states and 7038 transitions. [2023-03-30 22:46:05,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:46:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5267 states and 7038 transitions. [2023-03-30 22:46:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-03-30 22:46:05,998 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:46:05,998 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:46:06,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:46:06,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:06,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:46:06,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:46:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash -611593154, now seen corresponding path program 1 times [2023-03-30 22:46:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:46:06,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946573776] [2023-03-30 22:46:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:06,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:46:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:06,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:46:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:06,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:46:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:06,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-30 22:46:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-30 22:46:06,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:46:06,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946573776] [2023-03-30 22:46:06,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946573776] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:46:06,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254919837] [2023-03-30 22:46:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:06,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:46:06,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:46:06,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:46:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:07,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:46:07,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:46:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-30 22:46:07,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:46:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254919837] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:46:07,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:46:07,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-03-30 22:46:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789615807] [2023-03-30 22:46:07,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:46:07,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:46:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:46:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:46:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:46:07,356 INFO L87 Difference]: Start difference. First operand 5267 states and 7038 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 22:46:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:46:08,130 INFO L93 Difference]: Finished difference Result 10532 states and 14082 transitions. [2023-03-30 22:46:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:46:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 207 [2023-03-30 22:46:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:46:08,154 INFO L225 Difference]: With dead ends: 10532 [2023-03-30 22:46:08,155 INFO L226 Difference]: Without dead ends: 5271 [2023-03-30 22:46:08,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:46:08,169 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 86 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:46:08,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 453 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:46:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5271 states. [2023-03-30 22:46:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5271 to 5265. [2023-03-30 22:46:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5265 states, 5114 states have (on average 1.231716855690262) internal successors, (6299), 5213 states have internal predecessors, (6299), 26 states have call successors, (26), 26 states have call predecessors, (26), 124 states have return successors, (586), 25 states have call predecessors, (586), 25 states have call successors, (586) [2023-03-30 22:46:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 6911 transitions. [2023-03-30 22:46:08,323 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 6911 transitions. Word has length 207 [2023-03-30 22:46:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:46:08,324 INFO L495 AbstractCegarLoop]: Abstraction has 5265 states and 6911 transitions. [2023-03-30 22:46:08,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 22:46:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 6911 transitions. [2023-03-30 22:46:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-03-30 22:46:08,337 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:46:08,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 22:46:08,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:46:08,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:08,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:46:08,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:46:08,546 INFO L85 PathProgramCache]: Analyzing trace with hash -646274009, now seen corresponding path program 1 times [2023-03-30 22:46:08,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:46:08,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915255448] [2023-03-30 22:46:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:08,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:46:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:09,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:46:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:09,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:46:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:46:09,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:46:09,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915255448] [2023-03-30 22:46:09,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915255448] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:46:09,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:46:09,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 22:46:09,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295169075] [2023-03-30 22:46:09,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:46:09,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:46:09,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:46:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:46:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:46:09,284 INFO L87 Difference]: Start difference. First operand 5265 states and 6911 transitions. Second operand has 8 states, 7 states have (on average 30.0) internal successors, (210), 5 states have internal predecessors, (210), 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 22:46:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:46:11,890 INFO L93 Difference]: Finished difference Result 19204 states and 26726 transitions. [2023-03-30 22:46:11,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:46:11,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 30.0) internal successors, (210), 5 states have internal predecessors, (210), 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 216 [2023-03-30 22:46:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:46:11,966 INFO L225 Difference]: With dead ends: 19204 [2023-03-30 22:46:11,966 INFO L226 Difference]: Without dead ends: 13945 [2023-03-30 22:46:11,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:46:11,982 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1480 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:46:11,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 176 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-30 22:46:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13945 states. [2023-03-30 22:46:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13945 to 13843. [2023-03-30 22:46:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13843 states, 13473 states have (on average 1.1744971424330142) internal successors, (15824), 13711 states have internal predecessors, (15824), 66 states have call successors, (66), 66 states have call predecessors, (66), 303 states have return successors, (1722), 65 states have call predecessors, (1722), 65 states have call successors, (1722) [2023-03-30 22:46:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13843 states to 13843 states and 17612 transitions. [2023-03-30 22:46:12,407 INFO L78 Accepts]: Start accepts. Automaton has 13843 states and 17612 transitions. Word has length 216 [2023-03-30 22:46:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:46:12,408 INFO L495 AbstractCegarLoop]: Abstraction has 13843 states and 17612 transitions. [2023-03-30 22:46:12,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 30.0) internal successors, (210), 5 states have internal predecessors, (210), 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 22:46:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 13843 states and 17612 transitions. [2023-03-30 22:46:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-03-30 22:46:12,432 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:46:12,432 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:46:12,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-30 22:46:12,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:46:12,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:46:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash 404910460, now seen corresponding path program 1 times [2023-03-30 22:46:12,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:46:12,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362607019] [2023-03-30 22:46:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:12,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:46:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:12,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:46:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:13,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:46:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:13,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:46:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-03-30 22:46:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-03-30 22:46:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-30 22:46:13,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:46:13,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362607019] [2023-03-30 22:46:13,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362607019] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:46:13,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644662920] [2023-03-30 22:46:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:13,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:46:13,133 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:46:13,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:46:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:13,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:46:13,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:46:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-30 22:46:13,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:46:13,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644662920] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:46:13,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:46:13,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 22:46:13,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693464979] [2023-03-30 22:46:13,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:46:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:46:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:46:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:46:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:46:13,577 INFO L87 Difference]: Start difference. First operand 13843 states and 17612 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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 22:46:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:46:14,341 INFO L93 Difference]: Finished difference Result 27680 states and 35239 transitions. [2023-03-30 22:46:14,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:46:14,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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 223 [2023-03-30 22:46:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:46:14,391 INFO L225 Difference]: With dead ends: 27680 [2023-03-30 22:46:14,391 INFO L226 Difference]: Without dead ends: 13843 [2023-03-30 22:46:14,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:46:14,424 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 119 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:46:14,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 365 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:46:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13843 states. [2023-03-30 22:46:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13843 to 13843. [2023-03-30 22:46:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13843 states, 13473 states have (on average 1.1577228531136348) internal successors, (15598), 13711 states have internal predecessors, (15598), 66 states have call successors, (66), 66 states have call predecessors, (66), 303 states have return successors, (1486), 65 states have call predecessors, (1486), 65 states have call successors, (1486) [2023-03-30 22:46:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13843 states to 13843 states and 17150 transitions. [2023-03-30 22:46:14,801 INFO L78 Accepts]: Start accepts. Automaton has 13843 states and 17150 transitions. Word has length 223 [2023-03-30 22:46:14,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:46:14,801 INFO L495 AbstractCegarLoop]: Abstraction has 13843 states and 17150 transitions. [2023-03-30 22:46:14,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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 22:46:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 13843 states and 17150 transitions. [2023-03-30 22:46:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-03-30 22:46:14,826 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:46:14,826 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, 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] [2023-03-30 22:46:14,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:46:15,034 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 [2023-03-30 22:46:15,035 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:46:15,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:46:15,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1752383194, now seen corresponding path program 1 times [2023-03-30 22:46:15,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:46:15,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536221865] [2023-03-30 22:46:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:15,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:46:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:15,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:46:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:15,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:46:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-30 22:46:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:46:15,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:46:15,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536221865] [2023-03-30 22:46:15,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536221865] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:46:15,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357180151] [2023-03-30 22:46:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:15,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:15,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:46:15,893 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) [2023-03-30 22:46:15,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:46:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:16,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-30 22:46:16,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:46:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-30 22:46:16,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:46:16,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357180151] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:46:16,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:46:16,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:46:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640696933] [2023-03-30 22:46:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:46:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:46:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:46:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:46:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:46:16,271 INFO L87 Difference]: Start difference. First operand 13843 states and 17150 transitions. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:46:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:46:17,525 INFO L93 Difference]: Finished difference Result 34945 states and 44484 transitions. [2023-03-30 22:46:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 22:46:17,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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 228 [2023-03-30 22:46:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:46:17,600 INFO L225 Difference]: With dead ends: 34945 [2023-03-30 22:46:17,600 INFO L226 Difference]: Without dead ends: 21108 [2023-03-30 22:46:17,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-03-30 22:46:17,635 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 692 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:46:17,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 204 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:46:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21108 states. [2023-03-30 22:46:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21108 to 20944. [2023-03-30 22:46:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20944 states, 20392 states have (on average 1.1571694782267556) internal successors, (23597), 20746 states have internal predecessors, (23597), 99 states have call successors, (99), 99 states have call predecessors, (99), 452 states have return successors, (2466), 98 states have call predecessors, (2466), 98 states have call successors, (2466) [2023-03-30 22:46:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20944 states to 20944 states and 26162 transitions. [2023-03-30 22:46:18,273 INFO L78 Accepts]: Start accepts. Automaton has 20944 states and 26162 transitions. Word has length 228 [2023-03-30 22:46:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:46:18,274 INFO L495 AbstractCegarLoop]: Abstraction has 20944 states and 26162 transitions. [2023-03-30 22:46:18,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:46:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 20944 states and 26162 transitions. [2023-03-30 22:46:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-03-30 22:46:18,312 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:46:18,312 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:46:18,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-30 22:46:18,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:18,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:46:18,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:46:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1817206523, now seen corresponding path program 1 times [2023-03-30 22:46:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:46:18,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510285192] [2023-03-30 22:46:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:18,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:46:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:19,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:46:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:19,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:46:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:19,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:46:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:19,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:46:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 79 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:46:19,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:46:19,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510285192] [2023-03-30 22:46:19,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510285192] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:46:19,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642473355] [2023-03-30 22:46:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:19,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:19,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:46:19,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:46:19,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:46:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:19,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:46:19,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:46:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-30 22:46:19,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:46:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-30 22:46:19,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642473355] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:46:19,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:46:19,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-03-30 22:46:19,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924641000] [2023-03-30 22:46:19,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:46:19,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 22:46:19,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:46:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 22:46:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-03-30 22:46:19,958 INFO L87 Difference]: Start difference. First operand 20944 states and 26162 transitions. Second operand has 13 states, 13 states have (on average 21.76923076923077) internal successors, (283), 11 states have internal predecessors, (283), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 22:46:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:46:29,610 INFO L93 Difference]: Finished difference Result 75744 states and 117363 transitions. [2023-03-30 22:46:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-03-30 22:46:29,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.76923076923077) internal successors, (283), 11 states have internal predecessors, (283), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 231 [2023-03-30 22:46:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:46:29,920 INFO L225 Difference]: With dead ends: 75744 [2023-03-30 22:46:29,920 INFO L226 Difference]: Without dead ends: 54806 [2023-03-30 22:46:29,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=787, Invalid=3905, Unknown=0, NotChecked=0, Total=4692 [2023-03-30 22:46:29,994 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 2762 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 8243 mSolverCounterSat, 931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2762 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 9174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 931 IncrementalHoareTripleChecker+Valid, 8243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:46:29,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2762 Valid, 394 Invalid, 9174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [931 Valid, 8243 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-03-30 22:46:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54806 states. [2023-03-30 22:46:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54806 to 48268. [2023-03-30 22:46:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48268 states, 47138 states have (on average 1.1217913360770504) internal successors, (52879), 47789 states have internal predecessors, (52879), 251 states have call successors, (251), 228 states have call predecessors, (251), 878 states have return successors, (5504), 250 states have call predecessors, (5504), 250 states have call successors, (5504) [2023-03-30 22:46:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48268 states to 48268 states and 58634 transitions. [2023-03-30 22:46:31,750 INFO L78 Accepts]: Start accepts. Automaton has 48268 states and 58634 transitions. Word has length 231 [2023-03-30 22:46:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:46:31,750 INFO L495 AbstractCegarLoop]: Abstraction has 48268 states and 58634 transitions. [2023-03-30 22:46:31,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.76923076923077) internal successors, (283), 11 states have internal predecessors, (283), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 22:46:31,750 INFO L276 IsEmpty]: Start isEmpty. Operand 48268 states and 58634 transitions. [2023-03-30 22:46:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-03-30 22:46:31,809 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:46:31,810 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-30 22:46:31,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:46:32,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:32,018 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:46:32,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:46:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash 130916974, now seen corresponding path program 1 times [2023-03-30 22:46:32,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:46:32,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537453800] [2023-03-30 22:46:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:32,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:46:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:33,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:46:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:33,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:46:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:46:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:33,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-03-30 22:46:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 109 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:46:33,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:46:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537453800] [2023-03-30 22:46:33,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537453800] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:46:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146375234] [2023-03-30 22:46:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:33,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:46:33,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:46:33,440 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:46:33,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:46:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:46:33,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-30 22:46:33,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:46:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-30 22:46:33,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:46:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:46:34,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146375234] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:46:34,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:46:34,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2023-03-30 22:46:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633595436] [2023-03-30 22:46:34,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:46:34,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 22:46:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:46:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 22:46:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-03-30 22:46:34,387 INFO L87 Difference]: Start difference. First operand 48268 states and 58634 transitions. Second operand has 22 states, 22 states have (on average 15.227272727272727) internal successors, (335), 20 states have internal predecessors, (335), 6 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11)