/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_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:23:07,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:23:07,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:23:07,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:23:07,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:23:07,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:23:07,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:23:07,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:23:07,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:23:07,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:23:07,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:23:07,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:23:07,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:23:07,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:23:07,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:23:07,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:23:07,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 20:23:07,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 20:23:07,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 20:23:07,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 20:23:07,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 20:23:07,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 20:23:07,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 20:23:07,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 20:23:07,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 20:23:07,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:23:07,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:23:07,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:23:07,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:23:07,629 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:23:07,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:23:07,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:23:07,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:23:07,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:23:07,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:23:07,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:23:07,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:23:07,632 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:23:07,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:23:07,633 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:23:07,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:23:07,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:23:07,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:23:07,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:23:07,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:23:07,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:23:07,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:23:07,635 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:23:07,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:23:07,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:23:07,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:23:07,818 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:23:07,818 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:23:07,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label04.c [2023-04-01 20:23:08,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:23:09,142 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:23:09,143 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label04.c [2023-04-01 20:23:09,156 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fcac6ed1/b75551452b8d483286b87daaea95ef0a/FLAG01f9c83e1 [2023-04-01 20:23:09,168 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fcac6ed1/b75551452b8d483286b87daaea95ef0a [2023-04-01 20:23:09,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:23:09,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:23:09,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:23:09,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:23:09,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:23:09,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c71cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09, skipping insertion in model container [2023-04-01 20:23:09,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:23:09,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:23:09,570 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_label04.c[60959,60972] [2023-04-01 20:23:09,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:23:09,595 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:23:09,778 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_label04.c[60959,60972] [2023-04-01 20:23:09,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:23:09,796 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:23:09,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09 WrapperNode [2023-04-01 20:23:09,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:23:09,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:23:09,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:23:09,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:23:09,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,916 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:23:09,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:23:09,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:23:09,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:23:09,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (1/1) ... [2023-04-01 20:23:09,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:23:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:09,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:23:09,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:23:10,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:23:10,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:23:10,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:23:10,004 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:23:10,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:23:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:23:10,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:23:10,106 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:23:10,107 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:23:11,188 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:23:11,197 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:23:11,197 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:23:11,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:23:11 BoogieIcfgContainer [2023-04-01 20:23:11,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:23:11,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:23:11,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:23:11,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:23:11,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:23:09" (1/3) ... [2023-04-01 20:23:11,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356bd966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:23:11, skipping insertion in model container [2023-04-01 20:23:11,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:09" (2/3) ... [2023-04-01 20:23:11,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356bd966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:23:11, skipping insertion in model container [2023-04-01 20:23:11,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:23:11" (3/3) ... [2023-04-01 20:23:11,204 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label04.c [2023-04-01 20:23:11,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:23:11,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:23:11,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:23:11,273 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;@7ae4a1e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:23:11,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:23:11,277 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) [2023-04-01 20:23:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-04-01 20:23:11,289 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:11,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:11,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:11,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:11,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1435870250, now seen corresponding path program 1 times [2023-04-01 20:23:11,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:11,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860994695] [2023-04-01 20:23:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:11,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:12,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:12,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:12,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860994695] [2023-04-01 20:23:12,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860994695] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:12,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:12,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:23:12,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483412731] [2023-04-01 20:23:12,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:12,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:12,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:12,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:23:12,354 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 5 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:23:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:14,714 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2023-04-01 20:23:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:23:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 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 204 [2023-04-01 20:23:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:14,729 INFO L225 Difference]: With dead ends: 1107 [2023-04-01 20:23:14,729 INFO L226 Difference]: Without dead ends: 699 [2023-04-01 20:23:14,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:23:14,735 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 948 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:14,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 70 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 20:23:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2023-04-01 20:23:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2023-04-01 20:23:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 464 states have (on average 1.5280172413793103) internal successors, (709), 466 states have internal predecessors, (709), 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) [2023-04-01 20:23:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2023-04-01 20:23:14,800 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 204 [2023-04-01 20:23:14,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:14,801 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2023-04-01 20:23:14,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:23:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2023-04-01 20:23:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-04-01 20:23:14,805 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:14,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:14,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:23:14,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:14,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash 535102537, now seen corresponding path program 1 times [2023-04-01 20:23:14,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:14,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331538647] [2023-04-01 20:23:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:14,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:15,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:15,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:15,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:15,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331538647] [2023-04-01 20:23:15,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331538647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:15,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:15,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:23:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295701255] [2023-04-01 20:23:15,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:23:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:23:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:23:15,285 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand has 7 states, 6 states have (on average 35.0) internal successors, (210), 4 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) [2023-04-01 20:23:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:16,752 INFO L93 Difference]: Finished difference Result 1422 states and 2199 transitions. [2023-04-01 20:23:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:23:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 35.0) internal successors, (210), 4 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 [2023-04-01 20:23:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:16,756 INFO L225 Difference]: With dead ends: 1422 [2023-04-01 20:23:16,756 INFO L226 Difference]: Without dead ends: 954 [2023-04-01 20:23:16,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:23:16,758 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1223 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:16,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 142 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 20:23:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2023-04-01 20:23:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 934. [2023-04-01 20:23:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 914 states have (on average 1.50109409190372) internal successors, (1372), 922 states have internal predecessors, (1372), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 20:23:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1407 transitions. [2023-04-01 20:23:16,818 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1407 transitions. Word has length 216 [2023-04-01 20:23:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:16,819 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1407 transitions. [2023-04-01 20:23:16,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 35.0) internal successors, (210), 4 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) [2023-04-01 20:23:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1407 transitions. [2023-04-01 20:23:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-01 20:23:16,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:16,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:16,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:23:16,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:16,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1342966334, now seen corresponding path program 1 times [2023-04-01 20:23:16,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:16,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125756398] [2023-04-01 20:23:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:18,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:18,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:18,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125756398] [2023-04-01 20:23:18,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125756398] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:18,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879329496] [2023-04-01 20:23:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:18,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:18,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:18,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:23:18,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:23:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:18,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:23:18,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:18,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879329496] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:18,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:18,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 20:23:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743540820] [2023-04-01 20:23:18,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:18,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:23:18,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:18,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:23:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:23:18,711 INFO L87 Difference]: Start difference. First operand 934 states and 1407 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2023-04-01 20:23:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:19,401 INFO L93 Difference]: Finished difference Result 2736 states and 4217 transitions. [2023-04-01 20:23:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:23:19,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 225 [2023-04-01 20:23:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:19,408 INFO L225 Difference]: With dead ends: 2736 [2023-04-01 20:23:19,408 INFO L226 Difference]: Without dead ends: 1808 [2023-04-01 20:23:19,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:23:19,411 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:19,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 442 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:23:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2023-04-01 20:23:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1778. [2023-04-01 20:23:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1743 states have (on average 1.4675846242111303) internal successors, (2558), 1758 states have internal predecessors, (2558), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (95), 9 states have call predecessors, (95), 9 states have call successors, (95) [2023-04-01 20:23:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2663 transitions. [2023-04-01 20:23:19,460 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2663 transitions. Word has length 225 [2023-04-01 20:23:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:19,461 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 2663 transitions. [2023-04-01 20:23:19,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2023-04-01 20:23:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2663 transitions. [2023-04-01 20:23:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-04-01 20:23:19,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:19,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:19,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:19,672 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 [2023-04-01 20:23:19,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:19,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:19,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1106834497, now seen corresponding path program 1 times [2023-04-01 20:23:19,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:19,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278463698] [2023-04-01 20:23:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:20,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:20,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:23:20,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:20,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278463698] [2023-04-01 20:23:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278463698] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:20,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505848001] [2023-04-01 20:23:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:20,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:20,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:20,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:23:20,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:23:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:20,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:23:20,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:20,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:23:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505848001] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:23:20,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:23:20,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 20:23:20,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811555113] [2023-04-01 20:23:20,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:23:20,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:23:20,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:23:20,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:23:20,440 INFO L87 Difference]: Start difference. First operand 1778 states and 2663 transitions. Second operand has 13 states, 13 states have (on average 19.153846153846153) internal successors, (249), 11 states have internal predecessors, (249), 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) [2023-04-01 20:23:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:27,767 INFO L93 Difference]: Finished difference Result 17418 states and 33033 transitions. [2023-04-01 20:23:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-04-01 20:23:27,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.153846153846153) internal successors, (249), 11 states have internal predecessors, (249), 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 235 [2023-04-01 20:23:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:27,847 INFO L225 Difference]: With dead ends: 17418 [2023-04-01 20:23:27,847 INFO L226 Difference]: Without dead ends: 15646 [2023-04-01 20:23:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=853, Invalid=4403, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 20:23:27,865 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 2505 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 6950 mSolverCounterSat, 1153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2515 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 8103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 6950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:27,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2515 Valid, 477 Invalid, 8103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1153 Valid, 6950 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-04-01 20:23:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15646 states. [2023-04-01 20:23:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15646 to 15129. [2023-04-01 20:23:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15129 states, 14733 states have (on average 1.2009095228398832) internal successors, (17693), 14976 states have internal predecessors, (17693), 81 states have call successors, (81), 72 states have call predecessors, (81), 314 states have return successors, (2520), 80 states have call predecessors, (2520), 80 states have call successors, (2520) [2023-04-01 20:23:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15129 states to 15129 states and 20294 transitions. [2023-04-01 20:23:28,347 INFO L78 Accepts]: Start accepts. Automaton has 15129 states and 20294 transitions. Word has length 235 [2023-04-01 20:23:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:28,348 INFO L495 AbstractCegarLoop]: Abstraction has 15129 states and 20294 transitions. [2023-04-01 20:23:28,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.153846153846153) internal successors, (249), 11 states have internal predecessors, (249), 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) [2023-04-01 20:23:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 15129 states and 20294 transitions. [2023-04-01 20:23:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-04-01 20:23:28,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:28,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:28,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 20:23:28,588 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 [2023-04-01 20:23:28,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:28,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash -622481002, now seen corresponding path program 1 times [2023-04-01 20:23:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:28,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722393031] [2023-04-01 20:23:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:28,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:29,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:29,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722393031] [2023-04-01 20:23:29,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722393031] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:29,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:29,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:23:29,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135118532] [2023-04-01 20:23:29,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:29,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:23:29,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:23:29,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:23:29,096 INFO L87 Difference]: Start difference. First operand 15129 states and 20294 transitions. Second operand has 8 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:23:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:30,751 INFO L93 Difference]: Finished difference Result 25404 states and 34455 transitions. [2023-04-01 20:23:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:23:30,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 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 238 [2023-04-01 20:23:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:30,791 INFO L225 Difference]: With dead ends: 25404 [2023-04-01 20:23:30,791 INFO L226 Difference]: Without dead ends: 15187 [2023-04-01 20:23:30,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:23:30,807 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1101 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:30,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 116 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 20:23:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15187 states. [2023-04-01 20:23:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15187 to 15163. [2023-04-01 20:23:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15163 states, 14750 states have (on average 1.1716610169491526) internal successors, (17282), 15010 states have internal predecessors, (17282), 81 states have call successors, (81), 72 states have call predecessors, (81), 331 states have return successors, (2138), 80 states have call predecessors, (2138), 80 states have call successors, (2138) [2023-04-01 20:23:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19501 transitions. [2023-04-01 20:23:31,147 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19501 transitions. Word has length 238 [2023-04-01 20:23:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:31,148 INFO L495 AbstractCegarLoop]: Abstraction has 15163 states and 19501 transitions. [2023-04-01 20:23:31,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:23:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19501 transitions. [2023-04-01 20:23:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-04-01 20:23:31,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:31,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:31,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 20:23:31,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:31,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1595711111, now seen corresponding path program 1 times [2023-04-01 20:23:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:31,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420339337] [2023-04-01 20:23:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:31,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:31,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:23:31,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:31,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420339337] [2023-04-01 20:23:31,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420339337] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:31,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903026478] [2023-04-01 20:23:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:31,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:31,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:31,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:23:31,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:23:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:32,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:23:32,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:23:32,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903026478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:32,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:23:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307944818] [2023-04-01 20:23:32,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:32,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:23:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:23:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:23:32,308 INFO L87 Difference]: Start difference. First operand 15163 states and 19501 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:23:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:33,169 INFO L93 Difference]: Finished difference Result 30323 states and 39002 transitions. [2023-04-01 20:23:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:23:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 249 [2023-04-01 20:23:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:33,207 INFO L225 Difference]: With dead ends: 30323 [2023-04-01 20:23:33,207 INFO L226 Difference]: Without dead ends: 15166 [2023-04-01 20:23:33,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:23:33,231 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:33,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 440 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:23:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15166 states. [2023-04-01 20:23:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15166 to 15157. [2023-04-01 20:23:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15157 states, 14747 states have (on average 1.1622024818607175) internal successors, (17139), 15004 states have internal predecessors, (17139), 81 states have call successors, (81), 72 states have call predecessors, (81), 328 states have return successors, (2000), 80 states have call predecessors, (2000), 80 states have call successors, (2000) [2023-04-01 20:23:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15157 states to 15157 states and 19220 transitions. [2023-04-01 20:23:33,567 INFO L78 Accepts]: Start accepts. Automaton has 15157 states and 19220 transitions. Word has length 249 [2023-04-01 20:23:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:33,567 INFO L495 AbstractCegarLoop]: Abstraction has 15157 states and 19220 transitions. [2023-04-01 20:23:33,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:23:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 15157 states and 19220 transitions. [2023-04-01 20:23:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-04-01 20:23:33,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:33,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:33,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:33,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:33,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash 301085824, now seen corresponding path program 1 times [2023-04-01 20:23:33,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:33,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278653512] [2023-04-01 20:23:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:33,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:34,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:34,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:23:34,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:34,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278653512] [2023-04-01 20:23:34,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278653512] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:34,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190531694] [2023-04-01 20:23:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:34,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:34,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:23:34,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:23:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:34,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:23:34,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:34,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:23:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190531694] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:23:34,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:23:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 20:23:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358630100] [2023-04-01 20:23:34,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:23:34,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 20:23:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 20:23:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:34,853 INFO L87 Difference]: Start difference. First operand 15157 states and 19220 transitions. Second operand has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 9 states have internal predecessors, (342), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:23:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:38,464 INFO L93 Difference]: Finished difference Result 44127 states and 60880 transitions. [2023-04-01 20:23:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:23:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 9 states have internal predecessors, (342), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 268 [2023-04-01 20:23:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:38,544 INFO L225 Difference]: With dead ends: 44127 [2023-04-01 20:23:38,544 INFO L226 Difference]: Without dead ends: 28976 [2023-04-01 20:23:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-04-01 20:23:38,575 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1794 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3286 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:38,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 143 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 3286 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 20:23:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28976 states. [2023-04-01 20:23:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28976 to 28463. [2023-04-01 20:23:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28463 states, 27784 states have (on average 1.1225885401670026) internal successors, (31190), 28174 states have internal predecessors, (31190), 154 states have call successors, (154), 135 states have call predecessors, (154), 524 states have return successors, (3240), 153 states have call predecessors, (3240), 153 states have call successors, (3240) [2023-04-01 20:23:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28463 states to 28463 states and 34584 transitions. [2023-04-01 20:23:39,220 INFO L78 Accepts]: Start accepts. Automaton has 28463 states and 34584 transitions. Word has length 268 [2023-04-01 20:23:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:39,221 INFO L495 AbstractCegarLoop]: Abstraction has 28463 states and 34584 transitions. [2023-04-01 20:23:39,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 9 states have internal predecessors, (342), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:23:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 28463 states and 34584 transitions. [2023-04-01 20:23:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-04-01 20:23:39,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:39,267 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:23:39,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:39,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:39,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:39,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1831768238, now seen corresponding path program 1 times [2023-04-01 20:23:39,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:39,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569917671] [2023-04-01 20:23:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:40,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:40,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-04-01 20:23:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:40,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-04-01 20:23:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 139 proven. 59 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:23:40,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569917671] [2023-04-01 20:23:40,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569917671] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899823222] [2023-04-01 20:23:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:40,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:40,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:23:40,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:23:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:40,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:23:40,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-01 20:23:40,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899823222] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:40,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:40,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:23:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108650086] [2023-04-01 20:23:40,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:40,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:40,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:40,834 INFO L87 Difference]: Start difference. First operand 28463 states and 34584 transitions. Second operand has 5 states, 5 states have (on average 56.4) internal successors, (282), 4 states have internal predecessors, (282), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:41,900 INFO L93 Difference]: Finished difference Result 48317 states and 58935 transitions. [2023-04-01 20:23:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:41,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 56.4) internal successors, (282), 4 states have internal predecessors, (282), 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 354 [2023-04-01 20:23:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:41,968 INFO L225 Difference]: With dead ends: 48317 [2023-04-01 20:23:41,968 INFO L226 Difference]: Without dead ends: 28556 [2023-04-01 20:23:41,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:41,998 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 529 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:41,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 154 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:23:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28556 states. [2023-04-01 20:23:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28556 to 28469. [2023-04-01 20:23:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28469 states, 27782 states have (on average 1.1191418904326542) internal successors, (31092), 28185 states have internal predecessors, (31092), 149 states have call successors, (149), 135 states have call predecessors, (149), 537 states have return successors, (3033), 148 states have call predecessors, (3033), 148 states have call successors, (3033) [2023-04-01 20:23:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28469 states to 28469 states and 34274 transitions. [2023-04-01 20:23:42,665 INFO L78 Accepts]: Start accepts. Automaton has 28469 states and 34274 transitions. Word has length 354 [2023-04-01 20:23:42,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:42,666 INFO L495 AbstractCegarLoop]: Abstraction has 28469 states and 34274 transitions. [2023-04-01 20:23:42,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.4) internal successors, (282), 4 states have internal predecessors, (282), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 28469 states and 34274 transitions. [2023-04-01 20:23:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-04-01 20:23:42,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:42,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:42,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 20:23:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:42,911 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:42,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1290600347, now seen corresponding path program 1 times [2023-04-01 20:23:42,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:42,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311568230] [2023-04-01 20:23:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:42,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:43,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:43,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:43,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 20:23:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 153 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:23:43,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:43,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311568230] [2023-04-01 20:23:43,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311568230] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:43,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811507620] [2023-04-01 20:23:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:43,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:43,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:43,993 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:23:44,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:23:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:44,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:23:44,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 20:23:44,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:44,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811507620] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:44,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:44,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:23:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024047188] [2023-04-01 20:23:44,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:44,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:44,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:44,457 INFO L87 Difference]: Start difference. First operand 28469 states and 34274 transitions. Second operand has 5 states, 5 states have (on average 59.8) internal successors, (299), 4 states have internal predecessors, (299), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:23:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:45,309 INFO L93 Difference]: Finished difference Result 72304 states and 88626 transitions. [2023-04-01 20:23:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 4 states have internal predecessors, (299), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 363 [2023-04-01 20:23:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:45,463 INFO L225 Difference]: With dead ends: 72304 [2023-04-01 20:23:45,463 INFO L226 Difference]: Without dead ends: 43897 [2023-04-01 20:23:45,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:45,490 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 793 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:45,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 808 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:23:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43897 states. [2023-04-01 20:23:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43897 to 43483. [2023-04-01 20:23:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43483 states, 42416 states have (on average 1.1152866842700868) internal successors, (47306), 43056 states have internal predecessors, (47306), 222 states have call successors, (222), 205 states have call predecessors, (222), 844 states have return successors, (4554), 221 states have call predecessors, (4554), 221 states have call successors, (4554) [2023-04-01 20:23:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43483 states to 43483 states and 52082 transitions. [2023-04-01 20:23:46,361 INFO L78 Accepts]: Start accepts. Automaton has 43483 states and 52082 transitions. Word has length 363 [2023-04-01 20:23:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:46,362 INFO L495 AbstractCegarLoop]: Abstraction has 43483 states and 52082 transitions. [2023-04-01 20:23:46,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 4 states have internal predecessors, (299), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:23:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 43483 states and 52082 transitions. [2023-04-01 20:23:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-04-01 20:23:46,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:46,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:46,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:46,621 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 [2023-04-01 20:23:46,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:46,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:46,622 INFO L85 PathProgramCache]: Analyzing trace with hash -454765108, now seen corresponding path program 1 times [2023-04-01 20:23:46,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:46,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334410992] [2023-04-01 20:23:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:46,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:47,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 20:23:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 178 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:23:47,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:47,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334410992] [2023-04-01 20:23:47,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334410992] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:47,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155823043] [2023-04-01 20:23:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:47,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:47,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:47,708 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) [2023-04-01 20:23:47,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:23:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:47,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 20:23:47,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 20:23:48,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:48,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155823043] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:48,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:48,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:23:48,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615871610] [2023-04-01 20:23:48,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:48,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:48,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:48,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:48,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:48,348 INFO L87 Difference]: Start difference. First operand 43483 states and 52082 transitions. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 4 states have internal predecessors, (298), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:49,807 INFO L93 Difference]: Finished difference Result 80810 states and 97886 transitions. [2023-04-01 20:23:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 20:23:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 4 states have internal predecessors, (298), 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 388 [2023-04-01 20:23:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:50,021 INFO L225 Difference]: With dead ends: 80810 [2023-04-01 20:23:50,021 INFO L226 Difference]: Without dead ends: 52852 [2023-04-01 20:23:50,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:23:50,051 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 512 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:50,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 118 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:23:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2023-04-01 20:23:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 52780. [2023-04-01 20:23:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52780 states, 51539 states have (on average 1.1182211529133277) internal successors, (57632), 52265 states have internal predecessors, (57632), 266 states have call successors, (266), 249 states have call predecessors, (266), 974 states have return successors, (5569), 265 states have call predecessors, (5569), 265 states have call successors, (5569) [2023-04-01 20:23:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52780 states to 52780 states and 63467 transitions. [2023-04-01 20:23:50,962 INFO L78 Accepts]: Start accepts. Automaton has 52780 states and 63467 transitions. Word has length 388 [2023-04-01 20:23:50,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:50,962 INFO L495 AbstractCegarLoop]: Abstraction has 52780 states and 63467 transitions. [2023-04-01 20:23:50,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 4 states have internal predecessors, (298), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 52780 states and 63467 transitions. [2023-04-01 20:23:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-04-01 20:23:51,027 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:51,027 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:51,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:51,233 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 [2023-04-01 20:23:51,234 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:51,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 781201394, now seen corresponding path program 1 times [2023-04-01 20:23:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:51,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361390132] [2023-04-01 20:23:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:51,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 20:23:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 20:23:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 194 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 20:23:52,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361390132] [2023-04-01 20:23:52,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361390132] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621779607] [2023-04-01 20:23:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:52,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:52,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:52,279 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) [2023-04-01 20:23:52,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:23:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 20:23:52,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:23:52,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:23:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:23:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621779607] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:23:53,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:23:53,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-04-01 20:23:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53987811] [2023-04-01 20:23:53,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:23:53,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:23:53,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:23:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:23:53,286 INFO L87 Difference]: Start difference. First operand 52780 states and 63467 transitions. Second operand has 15 states, 15 states have (on average 32.733333333333334) internal successors, (491), 13 states have internal predecessors, (491), 6 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:24:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:08,152 INFO L93 Difference]: Finished difference Result 139121 states and 198092 transitions. [2023-04-01 20:24:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2023-04-01 20:24:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 32.733333333333334) internal successors, (491), 13 states have internal predecessors, (491), 6 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 400 [2023-04-01 20:24:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:08,674 INFO L225 Difference]: With dead ends: 139121 [2023-04-01 20:24:08,675 INFO L226 Difference]: Without dead ends: 86359 [2023-04-01 20:24:08,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 911 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11630 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3115, Invalid=24275, Unknown=0, NotChecked=0, Total=27390 [2023-04-01 20:24:08,731 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 5158 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 12599 mSolverCounterSat, 1227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5184 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 13826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1227 IncrementalHoareTripleChecker+Valid, 12599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:08,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5184 Valid, 957 Invalid, 13826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1227 Valid, 12599 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-04-01 20:24:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86359 states. [2023-04-01 20:24:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86359 to 80791. [2023-04-01 20:24:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80791 states, 78883 states have (on average 1.0883460314643205) internal successors, (85852), 80015 states have internal predecessors, (85852), 396 states have call successors, (396), 380 states have call predecessors, (396), 1511 states have return successors, (6811), 395 states have call predecessors, (6811), 395 states have call successors, (6811) [2023-04-01 20:24:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80791 states to 80791 states and 93059 transitions. [2023-04-01 20:24:10,757 INFO L78 Accepts]: Start accepts. Automaton has 80791 states and 93059 transitions. Word has length 400 [2023-04-01 20:24:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:10,757 INFO L495 AbstractCegarLoop]: Abstraction has 80791 states and 93059 transitions. [2023-04-01 20:24:10,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 32.733333333333334) internal successors, (491), 13 states have internal predecessors, (491), 6 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:24:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 80791 states and 93059 transitions. [2023-04-01 20:24:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2023-04-01 20:24:10,957 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:10,957 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:10,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 20:24:11,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 20:24:11,163 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:11,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash 658795086, now seen corresponding path program 1 times [2023-04-01 20:24:11,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:11,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055792985] [2023-04-01 20:24:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:11,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:12,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:24:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:12,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-04-01 20:24:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 218 proven. 96 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:24:12,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:12,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055792985] [2023-04-01 20:24:12,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055792985] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:12,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064809082] [2023-04-01 20:24:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:12,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:12,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:12,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:24:12,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 20:24:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:12,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:24:12,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 20:24:12,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:24:12,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064809082] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:12,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:24:12,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 20:24:12,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880490068] [2023-04-01 20:24:12,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:12,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:24:12,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:12,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:24:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:24:12,666 INFO L87 Difference]: Start difference. First operand 80791 states and 93059 transitions. Second operand has 5 states, 5 states have (on average 66.0) internal successors, (330), 4 states have internal predecessors, (330), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:24:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:14,850 INFO L93 Difference]: Finished difference Result 201790 states and 237821 transitions. [2023-04-01 20:24:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:24:14,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 66.0) internal successors, (330), 4 states have internal predecessors, (330), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 428 [2023-04-01 20:24:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:15,266 INFO L225 Difference]: With dead ends: 201790 [2023-04-01 20:24:15,266 INFO L226 Difference]: Without dead ends: 122757 [2023-04-01 20:24:15,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:24:15,337 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 763 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:15,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 803 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:24:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122757 states. [2023-04-01 20:24:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122757 to 121593. [2023-04-01 20:24:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121593 states, 118652 states have (on average 1.0899099888750294) internal successors, (129320), 120438 states have internal predecessors, (129320), 585 states have call successors, (585), 570 states have call predecessors, (585), 2355 states have return successors, (10431), 584 states have call predecessors, (10431), 584 states have call successors, (10431) [2023-04-01 20:24:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121593 states to 121593 states and 140336 transitions. [2023-04-01 20:24:17,896 INFO L78 Accepts]: Start accepts. Automaton has 121593 states and 140336 transitions. Word has length 428 [2023-04-01 20:24:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:17,896 INFO L495 AbstractCegarLoop]: Abstraction has 121593 states and 140336 transitions. [2023-04-01 20:24:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.0) internal successors, (330), 4 states have internal predecessors, (330), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:24:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 121593 states and 140336 transitions. [2023-04-01 20:24:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-04-01 20:24:18,154 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:18,155 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:18,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:18,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:18,378 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:18,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash -450420322, now seen corresponding path program 1 times [2023-04-01 20:24:18,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:18,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700085017] [2023-04-01 20:24:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:19,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:19,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:19,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:24:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2023-04-01 20:24:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 258 proven. 85 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:24:19,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:19,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700085017] [2023-04-01 20:24:19,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700085017] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:19,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079817572] [2023-04-01 20:24:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:19,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:19,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:19,638 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:24:19,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 20:24:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:19,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:24:19,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 344 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:24:20,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:24:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 344 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:24:20,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079817572] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:24:20,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:24:20,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 20:24:20,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117086763] [2023-04-01 20:24:20,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:24:20,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:24:20,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:20,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:24:20,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:24:20,336 INFO L87 Difference]: Start difference. First operand 121593 states and 140336 transitions. Second operand has 13 states, 13 states have (on average 50.23076923076923) internal successors, (653), 11 states have internal predecessors, (653), 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) [2023-04-01 20:24:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:39,852 INFO L93 Difference]: Finished difference Result 449207 states and 615433 transitions. [2023-04-01 20:24:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-04-01 20:24:39,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 50.23076923076923) internal successors, (653), 11 states have internal predecessors, (653), 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 451 [2023-04-01 20:24:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:41,335 INFO L225 Difference]: With dead ends: 449207 [2023-04-01 20:24:41,335 INFO L226 Difference]: Without dead ends: 279144 [2023-04-01 20:24:41,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=872, Invalid=4828, Unknown=0, NotChecked=0, Total=5700 [2023-04-01 20:24:41,792 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 3797 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 9256 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3815 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 9979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 9256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:41,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3815 Valid, 668 Invalid, 9979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 9256 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 20:24:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279144 states. [2023-04-01 20:24:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279144 to 240324. [2023-04-01 20:24:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240324 states, 235093 states have (on average 1.0614948126911476) internal successors, (249550), 237737 states have internal predecessors, (249550), 1461 states have call successors, (1461), 1126 states have call predecessors, (1461), 3769 states have return successors, (20496), 1460 states have call predecessors, (20496), 1460 states have call successors, (20496) [2023-04-01 20:24:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240324 states to 240324 states and 271507 transitions. [2023-04-01 20:24:49,457 INFO L78 Accepts]: Start accepts. Automaton has 240324 states and 271507 transitions. Word has length 451 [2023-04-01 20:24:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:49,457 INFO L495 AbstractCegarLoop]: Abstraction has 240324 states and 271507 transitions. [2023-04-01 20:24:49,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 50.23076923076923) internal successors, (653), 11 states have internal predecessors, (653), 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) [2023-04-01 20:24:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 240324 states and 271507 transitions. [2023-04-01 20:24:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-04-01 20:24:49,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:49,574 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:24:49,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:49,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 20:24:49,783 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:49,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:49,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1878549536, now seen corresponding path program 1 times [2023-04-01 20:24:49,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:49,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653318487] [2023-04-01 20:24:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:51,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:51,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-04-01 20:24:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:51,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2023-04-01 20:24:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-04-01 20:24:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 251 proven. 198 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 20:24:51,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653318487] [2023-04-01 20:24:51,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653318487] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810033490] [2023-04-01 20:24:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:51,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:51,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:51,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:24:51,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 20:24:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:51,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 20:24:51,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-04-01 20:24:51,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:24:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810033490] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:51,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:24:51,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 20:24:51,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454803577] [2023-04-01 20:24:51,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:51,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:24:51,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:24:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:24:51,706 INFO L87 Difference]: Start difference. First operand 240324 states and 271507 transitions. Second operand has 5 states, 5 states have (on average 46.8) internal successors, (234), 4 states have internal predecessors, (234), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:24:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:57,961 INFO L93 Difference]: Finished difference Result 559249 states and 635569 transitions. [2023-04-01 20:24:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 20:24:57,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.8) internal successors, (234), 4 states have internal predecessors, (234), 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 458 [2023-04-01 20:24:57,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:59,218 INFO L225 Difference]: With dead ends: 559249 [2023-04-01 20:24:59,218 INFO L226 Difference]: Without dead ends: 330386 [2023-04-01 20:24:59,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-04-01 20:24:59,560 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 625 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:59,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 151 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:24:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330386 states. [2023-04-01 20:25:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330386 to 324686. [2023-04-01 20:25:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324686 states, 317673 states have (on average 1.0620197498685755) internal successors, (337375), 321203 states have internal predecessors, (337375), 1962 states have call successors, (1962), 1521 states have call predecessors, (1962), 5050 states have return successors, (27740), 1961 states have call predecessors, (27740), 1961 states have call successors, (27740) [2023-04-01 20:25:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324686 states to 324686 states and 367077 transitions. [2023-04-01 20:25:07,181 INFO L78 Accepts]: Start accepts. Automaton has 324686 states and 367077 transitions. Word has length 458 [2023-04-01 20:25:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:25:07,182 INFO L495 AbstractCegarLoop]: Abstraction has 324686 states and 367077 transitions. [2023-04-01 20:25:07,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.8) internal successors, (234), 4 states have internal predecessors, (234), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:25:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 324686 states and 367077 transitions. [2023-04-01 20:25:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-04-01 20:25:07,612 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:07,612 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:25:07,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 20:25:07,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 20:25:07,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:07,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:07,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1623075780, now seen corresponding path program 1 times [2023-04-01 20:25:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:07,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956428576] [2023-04-01 20:25:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:08,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:08,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:25:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:08,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:25:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:09,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2023-04-01 20:25:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-04-01 20:25:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2023-04-01 20:25:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 290 proven. 20 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 20:25:09,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956428576] [2023-04-01 20:25:09,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956428576] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:25:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760147086] [2023-04-01 20:25:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:09,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:25:09,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:25:09,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:25:09,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 20:25:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:09,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 20:25:09,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:25:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2023-04-01 20:25:09,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:25:09,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760147086] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:25:09,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:25:09,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 9 [2023-04-01 20:25:09,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310200397] [2023-04-01 20:25:09,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:25:09,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:25:09,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:09,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:25:09,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:25:09,583 INFO L87 Difference]: Start difference. First operand 324686 states and 367077 transitions. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 2 states have internal predecessors, (350), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:25:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:25:15,746 INFO L93 Difference]: Finished difference Result 631689 states and 714636 transitions. [2023-04-01 20:25:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:25:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 2 states have internal predecessors, (350), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 485 [2023-04-01 20:25:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:25:16,918 INFO L225 Difference]: With dead ends: 631689 [2023-04-01 20:25:16,932 INFO L226 Difference]: Without dead ends: 324584