/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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:27:26,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:27:26,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:27:26,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 20:27:26,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 20:27:26,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 20:27:26,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 20:27:26,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 20:27:26,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 20:27:26,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 20:27:26,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 20:27:26,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 20:27:26,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:27:26,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:27:26,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:27:26,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:27:26,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:27:26,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:27:26,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:27:26,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:27:26,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:27:26,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:27:26,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:27:26,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:27:26,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 20:27:26,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 20:27:26,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 20:27:26,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 20:27:26,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 20:27:26,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 20:27:26,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 20:27:26,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 20:27:26,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 20:27:26,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 20:27:26,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 20:27:26,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 20:27:26,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 20:27:26,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 20:27:26,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:27:26,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:27:26,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:27:26,925 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 20:27:26,961 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:27:26,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:27:26,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:27:26,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:27:26,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:27:26,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:27:26,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:27:26,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:27:26,965 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:27:26,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:27:26,966 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:27:26,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:27:26,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:27:26,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:27:26,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:27:26,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:27:26,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:27:26,967 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:27:26,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:27:26,967 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:27:26,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:27:26,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:27:26,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:27:26,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:27:26,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:27:26,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:27:26,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:27:26,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:27:26,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:27:26,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:27:26,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:27:26,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:27:26,969 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:27:26,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:27:26,969 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:27:26,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:27:27,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:27:27,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:27:27,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:27:27,210 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:27:27,210 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:27:27,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2023-04-01 20:27:28,428 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:27:28,793 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:27:28,793 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2023-04-01 20:27:28,812 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/747da1c40/aaf56d967d4a4b09956262500028d95f/FLAGbe6224f08 [2023-04-01 20:27:28,825 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/747da1c40/aaf56d967d4a4b09956262500028d95f [2023-04-01 20:27:28,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:27:28,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:27:28,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:27:28,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:27:28,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:27:28,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:27:28" (1/1) ... [2023-04-01 20:27:28,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36574417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:28, skipping insertion in model container [2023-04-01 20:27:28,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:27:28" (1/1) ... [2023-04-01 20:27:28,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:27:28,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:27:29,406 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_label26.c[55276,55289] [2023-04-01 20:27:29,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:27:29,458 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:27:29,631 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_label26.c[55276,55289] [2023-04-01 20:27:29,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:27:29,661 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:27:29,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29 WrapperNode [2023-04-01 20:27:29,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:27:29,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:27:29,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:27:29,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:27:29,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,799 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:27:29,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:27:29,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:27:29,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:27:29,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (1/1) ... [2023-04-01 20:27:29,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:27:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:29,850 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 20:27:29,864 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 20:27:29,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:27:29,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:27:29,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:27:29,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:27:29,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:27:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:27:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:27:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:27:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:27:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:27:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:27:30,009 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:27:30,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:27:31,504 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:27:31,518 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:27:31,519 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:27:31,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:27:31 BoogieIcfgContainer [2023-04-01 20:27:31,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:27:31,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:27:31,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:27:31,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:27:31,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:27:28" (1/3) ... [2023-04-01 20:27:31,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cbc1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:27:31, skipping insertion in model container [2023-04-01 20:27:31,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:29" (2/3) ... [2023-04-01 20:27:31,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cbc1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:27:31, skipping insertion in model container [2023-04-01 20:27:31,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:27:31" (3/3) ... [2023-04-01 20:27:31,533 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label26.c [2023-04-01 20:27:31,549 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:27:31,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:27:31,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:27:31,618 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;@65340adb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:27:31,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:27:31,627 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 20:27:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 20:27:31,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:31,641 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] [2023-04-01 20:27:31,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:31,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:31,645 INFO L85 PathProgramCache]: Analyzing trace with hash 966663970, now seen corresponding path program 1 times [2023-04-01 20:27:31,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:31,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655824031] [2023-04-01 20:27:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:31,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:32,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:32,809 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 20:27:32,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:32,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655824031] [2023-04-01 20:27:32,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655824031] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:32,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:27:32,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:27:32,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519399311] [2023-04-01 20:27:32,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:32,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:27:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:27:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:27:32,860 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 20:27:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:34,786 INFO L93 Difference]: Finished difference Result 889 states and 1547 transitions. [2023-04-01 20:27:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:27:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 162 [2023-04-01 20:27:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:34,800 INFO L225 Difference]: With dead ends: 889 [2023-04-01 20:27:34,801 INFO L226 Difference]: Without dead ends: 485 [2023-04-01 20:27:34,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:27:34,809 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 683 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:34,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 51 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 20:27:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-04-01 20:27:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2023-04-01 20:27:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 465 states have (on average 1.5483870967741935) internal successors, (720), 467 states have internal predecessors, (720), 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 20:27:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 731 transitions. [2023-04-01 20:27:34,885 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 731 transitions. Word has length 162 [2023-04-01 20:27:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:34,886 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 731 transitions. [2023-04-01 20:27:34,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 20:27:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 731 transitions. [2023-04-01 20:27:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-04-01 20:27:34,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:34,900 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] [2023-04-01 20:27:34,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:27:34,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:34,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1485669889, now seen corresponding path program 1 times [2023-04-01 20:27:34,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:34,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080978960] [2023-04-01 20:27:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:34,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,589 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 20:27:35,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:35,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080978960] [2023-04-01 20:27:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080978960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:35,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:27:35,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:27:35,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275582376] [2023-04-01 20:27:35,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:35,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:27:35,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:35,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:27:35,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:27:35,593 INFO L87 Difference]: Start difference. First operand 475 states and 731 transitions. Second operand has 7 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 20:27:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:37,268 INFO L93 Difference]: Finished difference Result 1426 states and 2228 transitions. [2023-04-01 20:27:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:27:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 174 [2023-04-01 20:27:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:37,275 INFO L225 Difference]: With dead ends: 1426 [2023-04-01 20:27:37,275 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 20:27:37,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:27:37,278 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1647 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:37,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 125 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 20:27:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 20:27:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 936. [2023-04-01 20:27:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 915 states have (on average 1.521311475409836) internal successors, (1392), 924 states have internal predecessors, (1392), 6 states have call successors, (6), 6 states have call predecessors, (6), 14 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 20:27:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1427 transitions. [2023-04-01 20:27:37,344 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1427 transitions. Word has length 174 [2023-04-01 20:27:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:37,347 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1427 transitions. [2023-04-01 20:27:37,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 20:27:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1427 transitions. [2023-04-01 20:27:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-01 20:27:37,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:37,353 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 20:27:37,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:27:37,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:37,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash -968085122, now seen corresponding path program 1 times [2023-04-01 20:27:37,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:37,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952992312] [2023-04-01 20:27:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:37,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:37,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:37,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:27:37,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:37,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952992312] [2023-04-01 20:27:37,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952992312] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:37,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:27:37,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:27:37,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594802501] [2023-04-01 20:27:37,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:37,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:27:37,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:27:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:27:37,888 INFO L87 Difference]: Start difference. First operand 936 states and 1427 transitions. Second operand has 7 states, 6 states have (on average 28.833333333333332) internal successors, (173), 4 states have internal predecessors, (173), 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 20:27:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:39,014 INFO L93 Difference]: Finished difference Result 1834 states and 2823 transitions. [2023-04-01 20:27:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:27:39,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 28.833333333333332) internal successors, (173), 4 states have internal predecessors, (173), 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 179 [2023-04-01 20:27:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:39,021 INFO L225 Difference]: With dead ends: 1834 [2023-04-01 20:27:39,021 INFO L226 Difference]: Without dead ends: 904 [2023-04-01 20:27:39,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:27:39,030 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 687 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:39,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 43 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 20:27:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-04-01 20:27:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 896. [2023-04-01 20:27:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 875 states have (on average 1.4674285714285715) internal successors, (1284), 884 states have internal predecessors, (1284), 6 states have call successors, (6), 6 states have call predecessors, (6), 14 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 20:27:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1319 transitions. [2023-04-01 20:27:39,068 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1319 transitions. Word has length 179 [2023-04-01 20:27:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:39,069 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1319 transitions. [2023-04-01 20:27:39,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 28.833333333333332) internal successors, (173), 4 states have internal predecessors, (173), 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 20:27:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1319 transitions. [2023-04-01 20:27:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-01 20:27:39,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:39,073 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-04-01 20:27:39,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:27:39,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:39,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1872000278, now seen corresponding path program 1 times [2023-04-01 20:27:39,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:39,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952530383] [2023-04-01 20:27:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:39,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:39,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:39,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 20:27:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:27:39,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952530383] [2023-04-01 20:27:39,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952530383] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:39,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031155048] [2023-04-01 20:27:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:39,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:39,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:39,693 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 20:27:39,721 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 20:27:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:39,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:27:39,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:27:40,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:40,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031155048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:40,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:40,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:27:40,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420210542] [2023-04-01 20:27:40,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:40,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:27:40,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:40,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:27:40,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:27:40,119 INFO L87 Difference]: Start difference. First operand 896 states and 1319 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 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 20:27:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:41,084 INFO L93 Difference]: Finished difference Result 2724 states and 4167 transitions. [2023-04-01 20:27:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:27:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 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 184 [2023-04-01 20:27:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:41,097 INFO L225 Difference]: With dead ends: 2724 [2023-04-01 20:27:41,097 INFO L226 Difference]: Without dead ends: 1834 [2023-04-01 20:27:41,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 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 20:27:41,106 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 780 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:41,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 104 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 20:27:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2023-04-01 20:27:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1794. [2023-04-01 20:27:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1747 states have (on average 1.3995420721236405) internal successors, (2445), 1774 states have internal predecessors, (2445), 10 states have call successors, (10), 10 states have call predecessors, (10), 36 states have return successors, (128), 9 states have call predecessors, (128), 9 states have call successors, (128) [2023-04-01 20:27:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2583 transitions. [2023-04-01 20:27:41,195 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2583 transitions. Word has length 184 [2023-04-01 20:27:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:41,195 INFO L495 AbstractCegarLoop]: Abstraction has 1794 states and 2583 transitions. [2023-04-01 20:27:41,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 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 20:27:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2583 transitions. [2023-04-01 20:27:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 20:27:41,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:41,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:41,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:27:41,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:41,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:41,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:41,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1675680909, now seen corresponding path program 1 times [2023-04-01 20:27:41,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:41,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77153799] [2023-04-01 20:27:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:41,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:42,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:42,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:27:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:27:42,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:42,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77153799] [2023-04-01 20:27:42,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77153799] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:42,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488052084] [2023-04-01 20:27:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:42,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:42,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:42,477 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 20:27:42,509 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 20:27:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:42,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:27:42,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:27:42,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:42,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488052084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:42,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:42,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:27:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790250357] [2023-04-01 20:27:42,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:42,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:27:42,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:42,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:27:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:27:42,859 INFO L87 Difference]: Start difference. First operand 1794 states and 2583 transitions. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 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 20:27:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:43,226 INFO L93 Difference]: Finished difference Result 5429 states and 8079 transitions. [2023-04-01 20:27:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:27:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 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 185 [2023-04-01 20:27:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:43,245 INFO L225 Difference]: With dead ends: 5429 [2023-04-01 20:27:43,245 INFO L226 Difference]: Without dead ends: 3641 [2023-04-01 20:27:43,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 186 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 20:27:43,251 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 976 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:43,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 817 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:27:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2023-04-01 20:27:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3605. [2023-04-01 20:27:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3491 states have (on average 1.3981667144084788) internal successors, (4881), 3569 states have internal predecessors, (4881), 18 states have call successors, (18), 18 states have call predecessors, (18), 95 states have return successors, (371), 17 states have call predecessors, (371), 17 states have call successors, (371) [2023-04-01 20:27:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 5270 transitions. [2023-04-01 20:27:43,390 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 5270 transitions. Word has length 185 [2023-04-01 20:27:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:43,390 INFO L495 AbstractCegarLoop]: Abstraction has 3605 states and 5270 transitions. [2023-04-01 20:27:43,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 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 20:27:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 5270 transitions. [2023-04-01 20:27:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-04-01 20:27:43,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:43,400 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:43,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:43,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:43,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:43,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1550243983, now seen corresponding path program 1 times [2023-04-01 20:27:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:43,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748754205] [2023-04-01 20:27:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:43,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:44,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:44,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:44,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:27:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:27:44,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:44,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748754205] [2023-04-01 20:27:44,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748754205] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:44,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300367652] [2023-04-01 20:27:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:44,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:44,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:44,689 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 20:27:44,699 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 20:27:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:44,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:27:44,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:27:44,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:27:45,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300367652] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:45,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:45,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:27:45,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625395050] [2023-04-01 20:27:45,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:45,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:27:45,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:27:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:27:45,086 INFO L87 Difference]: Start difference. First operand 3605 states and 5270 transitions. Second operand has 12 states, 12 states have (on average 16.833333333333332) internal successors, (202), 10 states have internal predecessors, (202), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:27:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:51,426 INFO L93 Difference]: Finished difference Result 19991 states and 34832 transitions. [2023-04-01 20:27:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-01 20:27:51,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.833333333333332) internal successors, (202), 10 states have internal predecessors, (202), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 187 [2023-04-01 20:27:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:51,552 INFO L225 Difference]: With dead ends: 19991 [2023-04-01 20:27:51,552 INFO L226 Difference]: Without dead ends: 16392 [2023-04-01 20:27:51,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 20:27:51,580 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2617 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 5039 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2621 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 5917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 5039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:51,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2621 Valid, 233 Invalid, 5917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 5039 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 20:27:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16392 states. [2023-04-01 20:27:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16392 to 15950. [2023-04-01 20:27:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 15392 states have (on average 1.2801455301455302) internal successors, (19704), 15788 states have internal predecessors, (19704), 88 states have call successors, (88), 74 states have call predecessors, (88), 469 states have return successors, (3132), 87 states have call predecessors, (3132), 87 states have call successors, (3132) [2023-04-01 20:27:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 22924 transitions. [2023-04-01 20:27:52,324 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 22924 transitions. Word has length 187 [2023-04-01 20:27:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:52,324 INFO L495 AbstractCegarLoop]: Abstraction has 15950 states and 22924 transitions. [2023-04-01 20:27:52,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.833333333333332) internal successors, (202), 10 states have internal predecessors, (202), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:27:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 22924 transitions. [2023-04-01 20:27:52,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-04-01 20:27:52,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:52,362 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:27:52,373 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 20:27:52,570 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 20:27:52,571 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:52,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash -266111713, now seen corresponding path program 1 times [2023-04-01 20:27:52,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:52,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135162065] [2023-04-01 20:27:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:52,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 20:27:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 20:27:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 20:27:53,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:53,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135162065] [2023-04-01 20:27:53,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135162065] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:53,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860886933] [2023-04-01 20:27:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:53,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:53,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:53,319 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 20:27:53,322 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 20:27:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:27:53,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 20:27:53,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860886933] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:53,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:53,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 20:27:53,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134840708] [2023-04-01 20:27:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:27:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:27:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:53,654 INFO L87 Difference]: Start difference. First operand 15950 states and 22924 transitions. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 4 states have internal predecessors, (178), 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 20:27:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:55,080 INFO L93 Difference]: Finished difference Result 42294 states and 62676 transitions. [2023-04-01 20:27:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:27:55,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 4 states have internal predecessors, (178), 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 206 [2023-04-01 20:27:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:55,190 INFO L225 Difference]: With dead ends: 42294 [2023-04-01 20:27:55,190 INFO L226 Difference]: Without dead ends: 26406 [2023-04-01 20:27:55,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:27:55,236 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 655 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:55,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 94 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 20:27:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2023-04-01 20:27:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 26258. [2023-04-01 20:27:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26258 states, 25418 states have (on average 1.2238571091352586) internal successors, (31108), 26000 states have internal predecessors, (31108), 136 states have call successors, (136), 122 states have call predecessors, (136), 703 states have return successors, (4311), 135 states have call predecessors, (4311), 135 states have call successors, (4311) [2023-04-01 20:27:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26258 states to 26258 states and 35555 transitions. [2023-04-01 20:27:56,082 INFO L78 Accepts]: Start accepts. Automaton has 26258 states and 35555 transitions. Word has length 206 [2023-04-01 20:27:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:56,083 INFO L495 AbstractCegarLoop]: Abstraction has 26258 states and 35555 transitions. [2023-04-01 20:27:56,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 4 states have internal predecessors, (178), 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 20:27:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 26258 states and 35555 transitions. [2023-04-01 20:27:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-04-01 20:27:56,113 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:56,113 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:56,120 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 20:27:56,320 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 20:27:56,320 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:56,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 219558994, now seen corresponding path program 1 times [2023-04-01 20:27:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:56,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636334595] [2023-04-01 20:27:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:57,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:57,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:27:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:27:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636334595] [2023-04-01 20:27:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636334595] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213260209] [2023-04-01 20:27:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:57,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:57,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:57,406 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 20:27:57,408 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 20:27:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:57,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:27:57,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:27:57,792 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:57,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213260209] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:57,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:57,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:27:57,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608411228] [2023-04-01 20:27:57,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:57,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:27:57,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:57,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:27:57,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:57,794 INFO L87 Difference]: Start difference. First operand 26258 states and 35555 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 20:27:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:59,198 INFO L93 Difference]: Finished difference Result 73853 states and 102338 transitions. [2023-04-01 20:27:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:27:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 208 [2023-04-01 20:27:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:59,354 INFO L225 Difference]: With dead ends: 73853 [2023-04-01 20:27:59,354 INFO L226 Difference]: Without dead ends: 47605 [2023-04-01 20:27:59,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:59,395 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 73 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:59,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 366 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:27:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47605 states. [2023-04-01 20:28:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47605 to 47517. [2023-04-01 20:28:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47517 states, 46304 states have (on average 1.211515203870076) internal successors, (56098), 47052 states have internal predecessors, (56098), 242 states have call successors, (242), 223 states have call predecessors, (242), 970 states have return successors, (8165), 241 states have call predecessors, (8165), 241 states have call successors, (8165) [2023-04-01 20:28:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47517 states to 47517 states and 64505 transitions. [2023-04-01 20:28:00,648 INFO L78 Accepts]: Start accepts. Automaton has 47517 states and 64505 transitions. Word has length 208 [2023-04-01 20:28:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:00,649 INFO L495 AbstractCegarLoop]: Abstraction has 47517 states and 64505 transitions. [2023-04-01 20:28:00,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 20:28:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 47517 states and 64505 transitions. [2023-04-01 20:28:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-04-01 20:28:00,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:00,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:28:00,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:28:00,894 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 20:28:00,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:00,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1437787937, now seen corresponding path program 1 times [2023-04-01 20:28:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:00,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196384219] [2023-04-01 20:28:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:01,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:02,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:02,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196384219] [2023-04-01 20:28:02,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196384219] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:28:02,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:28:02,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:28:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920186990] [2023-04-01 20:28:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:28:02,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:28:02,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:28:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:28:02,230 INFO L87 Difference]: Start difference. First operand 47517 states and 64505 transitions. Second operand has 7 states, 6 states have (on average 33.5) internal successors, (201), 4 states have internal predecessors, (201), 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 20:28:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:04,577 INFO L93 Difference]: Finished difference Result 82083 states and 110861 transitions. [2023-04-01 20:28:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:28:04,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 33.5) internal successors, (201), 4 states have internal predecessors, (201), 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 207 [2023-04-01 20:28:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:04,758 INFO L225 Difference]: With dead ends: 82083 [2023-04-01 20:28:04,759 INFO L226 Difference]: Without dead ends: 54276 [2023-04-01 20:28:04,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:28:04,799 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1080 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:04,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 107 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 20:28:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54276 states. [2023-04-01 20:28:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54276 to 54106. [2023-04-01 20:28:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54106 states, 52748 states have (on average 1.203268370364753) internal successors, (63470), 53580 states have internal predecessors, (63470), 272 states have call successors, (272), 254 states have call predecessors, (272), 1085 states have return successors, (9202), 271 states have call predecessors, (9202), 271 states have call successors, (9202) [2023-04-01 20:28:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54106 states to 54106 states and 72944 transitions. [2023-04-01 20:28:06,281 INFO L78 Accepts]: Start accepts. Automaton has 54106 states and 72944 transitions. Word has length 207 [2023-04-01 20:28:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:06,282 INFO L495 AbstractCegarLoop]: Abstraction has 54106 states and 72944 transitions. [2023-04-01 20:28:06,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 33.5) internal successors, (201), 4 states have internal predecessors, (201), 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 20:28:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 54106 states and 72944 transitions. [2023-04-01 20:28:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-01 20:28:06,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:06,325 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, 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] [2023-04-01 20:28:06,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 20:28:06,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:06,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1115556427, now seen corresponding path program 1 times [2023-04-01 20:28:06,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:06,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620692609] [2023-04-01 20:28:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:06,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:07,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:07,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:07,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:28:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:28:07,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:07,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620692609] [2023-04-01 20:28:07,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620692609] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:07,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423619877] [2023-04-01 20:28:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:07,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:07,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:07,552 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 20:28:07,554 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 20:28:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:07,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:28:07,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:28:07,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:28:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423619877] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:28:07,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:28:07,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 20:28:07,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196807226] [2023-04-01 20:28:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:28:07,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:28:07,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:28:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:28:07,976 INFO L87 Difference]: Start difference. First operand 54106 states and 72944 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 20:28:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:09,104 INFO L93 Difference]: Finished difference Result 86617 states and 115716 transitions. [2023-04-01 20:28:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:28:09,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 228 [2023-04-01 20:28:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:09,262 INFO L225 Difference]: With dead ends: 86617 [2023-04-01 20:28:09,262 INFO L226 Difference]: Without dead ends: 54118 [2023-04-01 20:28:09,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:28:09,328 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 116 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:09,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 62 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:28:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54118 states. [2023-04-01 20:28:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54118 to 54106. [2023-04-01 20:28:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54106 states, 52748 states have (on average 1.2016000606658073) internal successors, (63382), 53580 states have internal predecessors, (63382), 272 states have call successors, (272), 254 states have call predecessors, (272), 1085 states have return successors, (9090), 271 states have call predecessors, (9090), 271 states have call successors, (9090) [2023-04-01 20:28:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54106 states to 54106 states and 72744 transitions. [2023-04-01 20:28:11,006 INFO L78 Accepts]: Start accepts. Automaton has 54106 states and 72744 transitions. Word has length 228 [2023-04-01 20:28:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:11,007 INFO L495 AbstractCegarLoop]: Abstraction has 54106 states and 72744 transitions. [2023-04-01 20:28:11,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 20:28:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 54106 states and 72744 transitions. [2023-04-01 20:28:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-04-01 20:28:11,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:11,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:28:11,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 20:28:11,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:11,272 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:11,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:11,272 INFO L85 PathProgramCache]: Analyzing trace with hash 174124591, now seen corresponding path program 1 times [2023-04-01 20:28:11,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:11,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219288629] [2023-04-01 20:28:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:12,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:12,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:12,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:28:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:28:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219288629] [2023-04-01 20:28:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219288629] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125896946] [2023-04-01 20:28:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:12,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:12,453 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 20:28:12,456 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 20:28:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:12,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:28:12,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:28:12,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:28:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:28:13,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125896946] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:13,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:28:13,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2023-04-01 20:28:13,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660880933] [2023-04-01 20:28:13,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:28:13,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:28:13,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:13,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:28:13,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:28:13,143 INFO L87 Difference]: Start difference. First operand 54106 states and 72744 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 4 states have internal predecessors, (241), 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 20:28:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:14,966 INFO L93 Difference]: Finished difference Result 137742 states and 185381 transitions. [2023-04-01 20:28:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:28:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 4 states have internal predecessors, (241), 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 255 [2023-04-01 20:28:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:15,169 INFO L225 Difference]: With dead ends: 137742 [2023-04-01 20:28:15,170 INFO L226 Difference]: Without dead ends: 85774 [2023-04-01 20:28:15,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 504 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:28:15,333 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 413 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:15,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 123 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:28:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85774 states. [2023-04-01 20:28:16,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85774 to 85616. [2023-04-01 20:28:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85616 states, 83740 states have (on average 1.180176737520898) internal successors, (98828), 84787 states have internal predecessors, (98828), 425 states have call successors, (425), 404 states have call predecessors, (425), 1450 states have return successors, (13348), 424 states have call predecessors, (13348), 424 states have call successors, (13348) [2023-04-01 20:28:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85616 states to 85616 states and 112601 transitions. [2023-04-01 20:28:17,355 INFO L78 Accepts]: Start accepts. Automaton has 85616 states and 112601 transitions. Word has length 255 [2023-04-01 20:28:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:17,355 INFO L495 AbstractCegarLoop]: Abstraction has 85616 states and 112601 transitions. [2023-04-01 20:28:17,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 4 states have internal predecessors, (241), 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 20:28:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 85616 states and 112601 transitions. [2023-04-01 20:28:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-04-01 20:28:17,431 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:17,431 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:28:17,440 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 20:28:17,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:17,637 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:17,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:17,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1202233605, now seen corresponding path program 1 times [2023-04-01 20:28:17,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:17,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484929635] [2023-04-01 20:28:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:17,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:28:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:28:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484929635] [2023-04-01 20:28:18,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484929635] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778047019] [2023-04-01 20:28:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:18,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:18,617 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 20:28:18,622 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 20:28:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 20:28:18,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:19,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:28:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:19,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778047019] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:28:19,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:28:19,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 20:28:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703519921] [2023-04-01 20:28:19,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:28:19,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:28:19,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:19,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:28:19,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:28:19,694 INFO L87 Difference]: Start difference. First operand 85616 states and 112601 transitions. Second operand has 13 states, 13 states have (on average 32.53846153846154) internal successors, (423), 11 states have internal predecessors, (423), 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 20:28:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:29,000 INFO L93 Difference]: Finished difference Result 232109 states and 315021 transitions. [2023-04-01 20:28:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-04-01 20:28:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 32.53846153846154) internal successors, (423), 11 states have internal predecessors, (423), 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 265 [2023-04-01 20:28:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:29,622 INFO L225 Difference]: With dead ends: 232109 [2023-04-01 20:28:29,622 INFO L226 Difference]: Without dead ends: 147753 [2023-04-01 20:28:29,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=799, Invalid=4751, Unknown=0, NotChecked=0, Total=5550 [2023-04-01 20:28:29,829 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 2351 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 5764 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2360 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 6453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 5764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:29,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2360 Valid, 391 Invalid, 6453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 5764 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-04-01 20:28:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147753 states. [2023-04-01 20:28:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147753 to 143210. [2023-04-01 20:28:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143210 states, 139863 states have (on average 1.1480806217512851) internal successors, (160574), 141862 states have internal predecessors, (160574), 675 states have call successors, (675), 673 states have call predecessors, (675), 2671 states have return successors, (19903), 674 states have call predecessors, (19903), 674 states have call successors, (19903) [2023-04-01 20:28:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143210 states to 143210 states and 181152 transitions. [2023-04-01 20:28:33,488 INFO L78 Accepts]: Start accepts. Automaton has 143210 states and 181152 transitions. Word has length 265 [2023-04-01 20:28:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:33,489 INFO L495 AbstractCegarLoop]: Abstraction has 143210 states and 181152 transitions. [2023-04-01 20:28:33,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 32.53846153846154) internal successors, (423), 11 states have internal predecessors, (423), 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 20:28:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 143210 states and 181152 transitions. [2023-04-01 20:28:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-04-01 20:28:33,612 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:33,613 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:28:33,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 20:28:33,813 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,SelfDestructingSolverStorable11 [2023-04-01 20:28:33,814 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:33,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:33,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1494525904, now seen corresponding path program 1 times [2023-04-01 20:28:33,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:33,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536448290] [2023-04-01 20:28:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:33,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:34,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:34,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:28:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:34,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-04-01 20:28:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 161 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:28:34,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:34,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536448290] [2023-04-01 20:28:34,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536448290] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:34,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662327414] [2023-04-01 20:28:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:34,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:34,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:34,957 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 20:28:34,963 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 20:28:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:35,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:28:35,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 20:28:35,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:28:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 162 proven. 45 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 20:28:36,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662327414] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:28:36,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:28:36,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 20:28:36,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132491912] [2023-04-01 20:28:36,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:28:36,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:28:36,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:28:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:28:36,295 INFO L87 Difference]: Start difference. First operand 143210 states and 181152 transitions. Second operand has 13 states, 13 states have (on average 29.23076923076923) internal successors, (380), 11 states have internal predecessors, (380), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:28:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:45,585 INFO L93 Difference]: Finished difference Result 280791 states and 386924 transitions. [2023-04-01 20:28:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 20:28:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 29.23076923076923) internal successors, (380), 11 states have internal predecessors, (380), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 310 [2023-04-01 20:28:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:46,259 INFO L225 Difference]: With dead ends: 280791 [2023-04-01 20:28:46,260 INFO L226 Difference]: Without dead ends: 141649 [2023-04-01 20:28:46,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 661 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=547, Invalid=2423, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 20:28:46,387 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3245 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4088 mSolverCounterSat, 1088 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3245 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 5176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1088 IncrementalHoareTripleChecker+Valid, 4088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:46,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3245 Valid, 223 Invalid, 5176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1088 Valid, 4088 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 20:28:46,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141649 states. [2023-04-01 20:28:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141649 to 136820. [2023-04-01 20:28:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136820 states, 133620 states have (on average 1.1141520730429577) internal successors, (148873), 135512 states have internal predecessors, (148873), 665 states have call successors, (665), 643 states have call predecessors, (665), 2534 states have return successors, (14945), 664 states have call predecessors, (14945), 664 states have call successors, (14945) [2023-04-01 20:28:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136820 states to 136820 states and 164483 transitions. [2023-04-01 20:28:50,526 INFO L78 Accepts]: Start accepts. Automaton has 136820 states and 164483 transitions. Word has length 310 [2023-04-01 20:28:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:50,526 INFO L495 AbstractCegarLoop]: Abstraction has 136820 states and 164483 transitions. [2023-04-01 20:28:50,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.23076923076923) internal successors, (380), 11 states have internal predecessors, (380), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:28:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 136820 states and 164483 transitions. [2023-04-01 20:28:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-04-01 20:28:50,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:50,643 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:28:50,650 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 20:28:50,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 20:28:50,846 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:50,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:50,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1509702161, now seen corresponding path program 1 times [2023-04-01 20:28:50,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:50,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828229201] [2023-04-01 20:28:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:50,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:51,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:51,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:51,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 20:28:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 218 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:28:52,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828229201] [2023-04-01 20:28:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828229201] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667003261] [2023-04-01 20:28:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:52,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:52,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:52,072 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 20:28:52,075 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 20:28:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:52,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:28:52,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:52,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:28:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:52,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667003261] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:28:52,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:28:52,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 20:28:52,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019837745] [2023-04-01 20:28:52,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:28:52,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 20:28:52,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 20:28:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:28:52,606 INFO L87 Difference]: Start difference. First operand 136820 states and 164483 transitions. Second operand has 14 states, 14 states have (on average 32.142857142857146) internal successors, (450), 12 states have internal predecessors, (450), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:29:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:12,054 INFO L93 Difference]: Finished difference Result 316571 states and 414342 transitions. [2023-04-01 20:29:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-04-01 20:29:12,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 32.142857142857146) internal successors, (450), 12 states have internal predecessors, (450), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 327 [2023-04-01 20:29:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:12,985 INFO L225 Difference]: With dead ends: 316571 [2023-04-01 20:29:12,985 INFO L226 Difference]: Without dead ends: 183318 [2023-04-01 20:29:13,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6929 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1888, Invalid=15404, Unknown=0, NotChecked=0, Total=17292 [2023-04-01 20:29:13,156 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 3247 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 15971 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3257 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 17069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 15971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:13,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3257 Valid, 764 Invalid, 17069 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1098 Valid, 15971 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2023-04-01 20:29:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183318 states. [2023-04-01 20:29:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183318 to 167257. [2023-04-01 20:29:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167257 states, 163257 states have (on average 1.0814788952387953) internal successors, (176559), 165674 states have internal predecessors, (176559), 798 states have call successors, (798), 785 states have call predecessors, (798), 3201 states have return successors, (13149), 797 states have call predecessors, (13149), 797 states have call successors, (13149) [2023-04-01 20:29:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167257 states to 167257 states and 190506 transitions. [2023-04-01 20:29:17,635 INFO L78 Accepts]: Start accepts. Automaton has 167257 states and 190506 transitions. Word has length 327 [2023-04-01 20:29:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:17,636 INFO L495 AbstractCegarLoop]: Abstraction has 167257 states and 190506 transitions. [2023-04-01 20:29:17,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.142857142857146) internal successors, (450), 12 states have internal predecessors, (450), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:29:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 167257 states and 190506 transitions. [2023-04-01 20:29:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 20:29:17,980 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:17,980 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:29:17,988 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 20:29:18,180 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,SelfDestructingSolverStorable13 [2023-04-01 20:29:18,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:18,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1049692544, now seen corresponding path program 1 times [2023-04-01 20:29:18,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:18,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786210015] [2023-04-01 20:29:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:18,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:18,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:19,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 20:29:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-01 20:29:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:19,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-04-01 20:29:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 164 proven. 72 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-04-01 20:29:19,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:19,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786210015] [2023-04-01 20:29:19,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786210015] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:19,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201545092] [2023-04-01 20:29:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:19,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:19,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:19,160 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 20:29:19,163 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 20:29:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:19,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 20:29:19,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-04-01 20:29:19,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:29:19,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201545092] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:29:19,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:29:19,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 20:29:19,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471214894] [2023-04-01 20:29:19,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:29:19,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:29:19,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:29:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:29:19,660 INFO L87 Difference]: Start difference. First operand 167257 states and 190506 transitions. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 20:29:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:23,559 INFO L93 Difference]: Finished difference Result 382985 states and 432971 transitions. [2023-04-01 20:29:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:29:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 338 [2023-04-01 20:29:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:24,136 INFO L225 Difference]: With dead ends: 382985 [2023-04-01 20:29:24,137 INFO L226 Difference]: Without dead ends: 219165 [2023-04-01 20:29:24,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:29:24,370 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 647 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:24,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 89 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:29:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219165 states. [2023-04-01 20:29:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219165 to 217237. [2023-04-01 20:29:28,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217237 states, 212016 states have (on average 1.0721879480793903) internal successors, (227321), 215195 states have internal predecessors, (227321), 1023 states have call successors, (1023), 1019 states have call predecessors, (1023), 4197 states have return successors, (15495), 1022 states have call predecessors, (15495), 1022 states have call successors, (15495) [2023-04-01 20:29:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217237 states to 217237 states and 243839 transitions. [2023-04-01 20:29:29,279 INFO L78 Accepts]: Start accepts. Automaton has 217237 states and 243839 transitions. Word has length 338 [2023-04-01 20:29:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:29,280 INFO L495 AbstractCegarLoop]: Abstraction has 217237 states and 243839 transitions. [2023-04-01 20:29:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 20:29:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 217237 states and 243839 transitions. [2023-04-01 20:29:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-04-01 20:29:29,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:29,378 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:29,386 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 20:29:29,585 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,SelfDestructingSolverStorable14 [2023-04-01 20:29:29,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:29,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash -586220873, now seen corresponding path program 1 times [2023-04-01 20:29:29,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:29,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843166314] [2023-04-01 20:29:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:29,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:31,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:31,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:31,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-04-01 20:29:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:31,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-04-01 20:29:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 196 proven. 113 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 20:29:31,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:31,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843166314] [2023-04-01 20:29:31,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843166314] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:31,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119765085] [2023-04-01 20:29:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:31,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:31,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:31,949 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 20:29:31,951 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 20:29:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:32,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:29:32,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 317 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 20:29:32,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:29:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 317 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 20:29:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119765085] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:29:32,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:29:32,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:29:32,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974217684] [2023-04-01 20:29:32,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:29:32,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:29:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:32,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:29:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:29:32,771 INFO L87 Difference]: Start difference. First operand 217237 states and 243839 transitions. Second operand has 12 states, 12 states have (on average 40.083333333333336) internal successors, (481), 10 states have internal predecessors, (481), 4 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 20:29:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:49,666 INFO L93 Difference]: Finished difference Result 773493 states and 908695 transitions. [2023-04-01 20:29:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 20:29:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 40.083333333333336) internal successors, (481), 10 states have internal predecessors, (481), 4 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 367 [2023-04-01 20:29:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:52,175 INFO L225 Difference]: With dead ends: 773493 [2023-04-01 20:29:52,176 INFO L226 Difference]: Without dead ends: 532649 [2023-04-01 20:29:52,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 754 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 20:29:52,716 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2569 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 5001 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2574 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 5292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 5001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:52,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2574 Valid, 235 Invalid, 5292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 5001 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 20:29:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532649 states. [2023-04-01 20:30:04,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532649 to 517752. [2023-04-01 20:30:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517752 states, 506263 states have (on average 1.065849173255798) internal successors, (539600), 512262 states have internal predecessors, (539600), 3060 states have call successors, (3060), 2430 states have call predecessors, (3060), 8428 states have return successors, (45553), 3059 states have call predecessors, (45553), 3059 states have call successors, (45553) [2023-04-01 20:30:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517752 states to 517752 states and 588213 transitions. [2023-04-01 20:30:07,752 INFO L78 Accepts]: Start accepts. Automaton has 517752 states and 588213 transitions. Word has length 367 [2023-04-01 20:30:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:30:07,752 INFO L495 AbstractCegarLoop]: Abstraction has 517752 states and 588213 transitions. [2023-04-01 20:30:07,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 40.083333333333336) internal successors, (481), 10 states have internal predecessors, (481), 4 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 20:30:07,753 INFO L276 IsEmpty]: Start isEmpty. Operand 517752 states and 588213 transitions. [2023-04-01 20:30:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2023-04-01 20:30:07,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:30:07,999 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:30:08,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 20:30:08,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 20:30:08,200 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:30:08,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:30:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash 861813006, now seen corresponding path program 1 times [2023-04-01 20:30:08,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:30:08,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486959152] [2023-04-01 20:30:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:08,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:30:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:09,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:30:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:30:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:09,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:30:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:09,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-04-01 20:30:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 214 proven. 92 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:30:09,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:30:09,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486959152] [2023-04-01 20:30:09,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486959152] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:30:09,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964643734] [2023-04-01 20:30:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:09,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:30:09,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:30:09,349 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:30:09,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 20:30:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:09,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:30:09,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:30:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-01 20:30:09,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:30:09,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964643734] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:30:09,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:30:09,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 20:30:09,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027468037] [2023-04-01 20:30:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:30:09,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:30:09,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:30:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:30:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:30:09,808 INFO L87 Difference]: Start difference. First operand 517752 states and 588213 transitions. Second operand has 5 states, 5 states have (on average 57.6) internal successors, (288), 4 states have internal predecessors, (288), 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 20:30:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:30:27,902 INFO L93 Difference]: Finished difference Result 1165635 states and 1347818 transitions. [2023-04-01 20:30:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:30:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.6) internal successors, (288), 4 states have internal predecessors, (288), 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 382 [2023-04-01 20:30:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:30:30,973 INFO L225 Difference]: With dead ends: 1165635 [2023-04-01 20:30:30,973 INFO L226 Difference]: Without dead ends: 653016 [2023-04-01 20:30:31,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 384 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 20:30:31,689 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 760 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:30:31,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 800 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:30:32,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653016 states.