/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/float-benchs/zonotope_3.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:02:40,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:02:40,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:02:40,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:02:40,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:02:40,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:02:40,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:02:40,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:02:40,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:02:40,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:02:40,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:02:40,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:02:40,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:02:40,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:02:40,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:02:40,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:02:40,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:02:40,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:02:40,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:02:40,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:02:40,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:02:40,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:02:40,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:02:40,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:02:40,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 00:02:40,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 00:02:40,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 00:02:40,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 00:02:40,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 00:02:40,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-03-31 00:02:40,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:02:40,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:02:40,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:02:40,902 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:02:40,931 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:02:40,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:02:40,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:02:40,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:02:40,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:02:40,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:02:40,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:02:40,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:02:40,934 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:02:40,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:02:40,935 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:02:40,936 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:02:40,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:02:40,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:02:40,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:02:40,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:02:40,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:02:40,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:02:40,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:02:40,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:02:40,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:02:40,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:02:40,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:02:40,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:02:40,938 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:02:40,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:02:40,939 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:02:40,939 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:02:41,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:02:41,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:02:41,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:02:41,206 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:02:41,206 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:02:41,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2023-03-31 00:02:42,346 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:02:42,546 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:02:42,547 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2023-03-31 00:02:42,552 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/632943e9d/89f5e361025d48d3a097194e5a19b7b1/FLAGaae886ba6 [2023-03-31 00:02:42,569 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/632943e9d/89f5e361025d48d3a097194e5a19b7b1 [2023-03-31 00:02:42,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:02:42,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:02:42,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:02:42,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:02:42,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:02:42,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2117863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42, skipping insertion in model container [2023-03-31 00:02:42,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:02:42,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:02:42,779 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/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2023-03-31 00:02:42,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:02:42,796 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:02:42,813 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/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2023-03-31 00:02:42,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:02:42,826 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:02:42,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42 WrapperNode [2023-03-31 00:02:42,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:02:42,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:02:42,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:02:42,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:02:42,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:02:42,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:02:42,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:02:42,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:02:42,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (1/1) ... [2023-03-31 00:02:42,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:02:42,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:02:42,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 00:02:42,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 00:02:42,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:02:42,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:02:42,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:02:42,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:02:42,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:02:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:02:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:02:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:02:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:02:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:02:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:02:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:02:43,009 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:02:43,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:02:43,164 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:02:43,169 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:02:43,170 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 00:02:43,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:02:43 BoogieIcfgContainer [2023-03-31 00:02:43,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:02:43,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:02:43,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:02:43,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:02:43,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:02:42" (1/3) ... [2023-03-31 00:02:43,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5078abb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:02:43, skipping insertion in model container [2023-03-31 00:02:43,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:02:42" (2/3) ... [2023-03-31 00:02:43,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5078abb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:02:43, skipping insertion in model container [2023-03-31 00:02:43,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:02:43" (3/3) ... [2023-03-31 00:02:43,189 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2023-03-31 00:02:43,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:02:43,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:02:43,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:02:43,267 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;@511b0edb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:02:43,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:02:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:02:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 00:02:43,276 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:02:43,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:02:43,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:02:43,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:02:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash -242473645, now seen corresponding path program 1 times [2023-03-31 00:02:43,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:02:43,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763307735] [2023-03-31 00:02:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:02:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:43,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:02:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:43,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:02:43,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763307735] [2023-03-31 00:02:43,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763307735] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:02:43,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:02:43,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:02:43,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29577127] [2023-03-31 00:02:43,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:02:43,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:02:43,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:02:43,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:02:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:02:43,656 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:02:43,751 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2023-03-31 00:02:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:02:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 00:02:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:02:43,762 INFO L225 Difference]: With dead ends: 40 [2023-03-31 00:02:43,762 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 00:02:43,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:02:43,770 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:02:43,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:02:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 00:02:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-03-31 00:02:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-03-31 00:02:43,797 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-03-31 00:02:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:02:43,797 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-03-31 00:02:43,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-03-31 00:02:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 00:02:43,798 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:02:43,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:02:43,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:02:43,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:02:43,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:02:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash -355887846, now seen corresponding path program 1 times [2023-03-31 00:02:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:02:43,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609391485] [2023-03-31 00:02:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:02:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:43,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:02:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:43,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:02:43,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609391485] [2023-03-31 00:02:43,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609391485] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:02:43,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111567742] [2023-03-31 00:02:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:43,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:43,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:02:43,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:02:43,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:02:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:44,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 00:02:44,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:02:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:44,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:02:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:44,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111567742] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:02:44,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:02:44,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-31 00:02:44,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082993609] [2023-03-31 00:02:44,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:02:44,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:02:44,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:02:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:02:44,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:02:44,136 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:02:44,218 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-03-31 00:02:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:02:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 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 16 [2023-03-31 00:02:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:02:44,221 INFO L225 Difference]: With dead ends: 41 [2023-03-31 00:02:44,221 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 00:02:44,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:02:44,223 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:02:44,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 93 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:02:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 00:02:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-03-31 00:02:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-03-31 00:02:44,238 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 16 [2023-03-31 00:02:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:02:44,238 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-03-31 00:02:44,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-03-31 00:02:44,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 00:02:44,240 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:02:44,240 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:02:44,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 00:02:44,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:44,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:02:44,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:02:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1146781841, now seen corresponding path program 2 times [2023-03-31 00:02:44,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:02:44,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481878922] [2023-03-31 00:02:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:02:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:44,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:02:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 00:02:44,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:02:44,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481878922] [2023-03-31 00:02:44,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481878922] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:02:44,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113185595] [2023-03-31 00:02:44,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:02:44,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:44,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:02:44,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:02:44,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:02:44,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-03-31 00:02:44,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:02:44,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 00:02:44,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:02:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 00:02:44,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:02:44,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113185595] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:02:44,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:02:44,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-03-31 00:02:44,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464392606] [2023-03-31 00:02:44,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:02:44,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:02:44,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:02:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:02:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:02:44,745 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:02:44,761 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-03-31 00:02:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:02:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-03-31 00:02:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:02:44,763 INFO L225 Difference]: With dead ends: 38 [2023-03-31 00:02:44,763 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 00:02:44,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:02:44,765 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:02:44,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:02:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 00:02:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-03-31 00:02:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-03-31 00:02:44,772 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2023-03-31 00:02:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:02:44,773 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-03-31 00:02:44,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-03-31 00:02:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 00:02:44,774 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:02:44,774 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:02:44,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 00:02:44,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 00:02:44,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:02:44,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:02:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1131677804, now seen corresponding path program 1 times [2023-03-31 00:02:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:02:44,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460410958] [2023-03-31 00:02:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:44,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:02:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:45,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:02:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:45,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:02:45,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460410958] [2023-03-31 00:02:45,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460410958] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:02:45,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657643332] [2023-03-31 00:02:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:45,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:02:45,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:02:45,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:02:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:45,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 00:02:45,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:02:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:45,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:02:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657643332] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:02:45,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:02:45,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-03-31 00:02:45,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895707098] [2023-03-31 00:02:45,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:02:45,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:02:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:02:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:02:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:02:45,409 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:02:45,504 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2023-03-31 00:02:45,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 00:02:45,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 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 28 [2023-03-31 00:02:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:02:45,506 INFO L225 Difference]: With dead ends: 71 [2023-03-31 00:02:45,507 INFO L226 Difference]: Without dead ends: 64 [2023-03-31 00:02:45,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:02:45,511 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:02:45,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 89 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:02:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-03-31 00:02:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-03-31 00:02:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2023-03-31 00:02:45,526 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 28 [2023-03-31 00:02:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:02:45,527 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2023-03-31 00:02:45,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:45,527 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2023-03-31 00:02:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 00:02:45,528 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:02:45,528 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:02:45,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:02:45,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:45,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:02:45,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:02:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -861829698, now seen corresponding path program 2 times [2023-03-31 00:02:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:02:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344351123] [2023-03-31 00:02:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:02:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:46,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:02:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:46,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:02:46,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344351123] [2023-03-31 00:02:46,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344351123] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:02:46,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227847318] [2023-03-31 00:02:46,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:02:46,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:46,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:02:46,063 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:02:46,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:02:46,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:02:46,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:02:46,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 00:02:46,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:02:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:46,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:02:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:46,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227847318] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:02:46,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:02:46,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-03-31 00:02:46,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575033817] [2023-03-31 00:02:46,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:02:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 00:02:46,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:02:46,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 00:02:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:02:46,528 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:02:46,632 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2023-03-31 00:02:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 00:02:46,633 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 1 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 52 [2023-03-31 00:02:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:02:46,638 INFO L225 Difference]: With dead ends: 131 [2023-03-31 00:02:46,639 INFO L226 Difference]: Without dead ends: 124 [2023-03-31 00:02:46,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:02:46,641 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 216 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:02:46,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 166 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:02:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-03-31 00:02:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-03-31 00:02:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.3833333333333333) internal successors, (166), 120 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 169 transitions. [2023-03-31 00:02:46,666 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 169 transitions. Word has length 52 [2023-03-31 00:02:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:02:46,666 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 169 transitions. [2023-03-31 00:02:46,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 169 transitions. [2023-03-31 00:02:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 00:02:46,672 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:02:46,672 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:02:46,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:02:46,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:46,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:02:46,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:02:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1704032238, now seen corresponding path program 3 times [2023-03-31 00:02:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:02:46,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785820220] [2023-03-31 00:02:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:02:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:47,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:02:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:47,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:02:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785820220] [2023-03-31 00:02:47,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785820220] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:02:47,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018134030] [2023-03-31 00:02:47,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:02:47,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:47,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:02:47,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:02:47,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:02:47,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-03-31 00:02:47,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:02:47,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 00:02:47,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:02:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:48,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:02:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:48,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018134030] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:02:48,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:02:48,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-03-31 00:02:48,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577804283] [2023-03-31 00:02:48,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:02:48,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-31 00:02:48,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:02:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-31 00:02:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-03-31 00:02:48,963 INFO L87 Difference]: Start difference. First operand 124 states and 169 transitions. Second operand has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:02:49,252 INFO L93 Difference]: Finished difference Result 251 states and 368 transitions. [2023-03-31 00:02:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-31 00:02:49,253 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 1 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 100 [2023-03-31 00:02:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:02:49,254 INFO L225 Difference]: With dead ends: 251 [2023-03-31 00:02:49,255 INFO L226 Difference]: Without dead ends: 244 [2023-03-31 00:02:49,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-03-31 00:02:49,256 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 480 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:02:49,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 293 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:02:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-03-31 00:02:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2023-03-31 00:02:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.3916666666666666) internal successors, (334), 240 states have internal predecessors, (334), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2023-03-31 00:02:49,276 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 100 [2023-03-31 00:02:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:02:49,277 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2023-03-31 00:02:49,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2023-03-31 00:02:49,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-03-31 00:02:49,279 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:02:49,280 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:02:49,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:02:49,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:49,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:02:49,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:02:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash 786965690, now seen corresponding path program 4 times [2023-03-31 00:02:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:02:49,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166255182] [2023-03-31 00:02:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:49,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:02:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:51,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:02:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:02:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:51,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:02:51,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166255182] [2023-03-31 00:02:51,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166255182] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:02:51,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141759324] [2023-03-31 00:02:51,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:02:51,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:02:51,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:02:51,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:02:51,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:02:51,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:02:51,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 00:02:51,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:02:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:52,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:02:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:02:54,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141759324] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:02:54,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:02:54,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2023-03-31 00:02:54,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47327897] [2023-03-31 00:02:54,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:02:54,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-03-31 00:02:54,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:02:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-03-31 00:02:54,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2023-03-31 00:02:54,755 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:02:56,303 INFO L93 Difference]: Finished difference Result 491 states and 728 transitions. [2023-03-31 00:02:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-03-31 00:02:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 1 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 196 [2023-03-31 00:02:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:02:56,306 INFO L225 Difference]: With dead ends: 491 [2023-03-31 00:02:56,306 INFO L226 Difference]: Without dead ends: 484 [2023-03-31 00:02:56,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2023-03-31 00:02:56,310 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1428 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:02:56,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1428 Valid, 509 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:02:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-03-31 00:02:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2023-03-31 00:02:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 480 states have (on average 1.3958333333333333) internal successors, (670), 480 states have internal predecessors, (670), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 673 transitions. [2023-03-31 00:02:56,332 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 673 transitions. Word has length 196 [2023-03-31 00:02:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:02:56,333 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 673 transitions. [2023-03-31 00:02:56,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:02:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 673 transitions. [2023-03-31 00:02:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-03-31 00:02:56,339 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:02:56,339 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:02:56,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:02:56,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:02:56,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:02:56,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:02:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1578745354, now seen corresponding path program 5 times [2023-03-31 00:02:56,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:02:56,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658435682] [2023-03-31 00:02:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:02:56,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:02:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:03:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:03:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:03:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:03:02,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:03:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658435682] [2023-03-31 00:03:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658435682] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:03:02,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372361172] [2023-03-31 00:03:02,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:03:02,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:03:02,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:03:02,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:03:02,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:03:03,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2023-03-31 00:03:03,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:03:03,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 3168 conjuncts, 96 conjunts are in the unsatisfiable core [2023-03-31 00:03:03,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:03:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:03:04,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:03:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:03:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372361172] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:03:12,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:03:12,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2023-03-31 00:03:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094336171] [2023-03-31 00:03:12,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:03:12,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-03-31 00:03:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:03:12,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-03-31 00:03:12,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2023-03-31 00:03:12,899 INFO L87 Difference]: Start difference. First operand 484 states and 673 transitions. Second operand has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:03:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:03:23,820 INFO L93 Difference]: Finished difference Result 971 states and 1448 transitions. [2023-03-31 00:03:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-03-31 00:03:23,820 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 1 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 388 [2023-03-31 00:03:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:03:23,824 INFO L225 Difference]: With dead ends: 971 [2023-03-31 00:03:23,825 INFO L226 Difference]: Without dead ends: 964 [2023-03-31 00:03:23,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2023-03-31 00:03:23,829 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2694 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:03:23,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2694 Valid, 1037 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 00:03:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2023-03-31 00:03:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 964. [2023-03-31 00:03:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 960 states have (on average 1.3979166666666667) internal successors, (1342), 960 states have internal predecessors, (1342), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:03:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1345 transitions. [2023-03-31 00:03:23,860 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1345 transitions. Word has length 388 [2023-03-31 00:03:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:03:23,861 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 1345 transitions. [2023-03-31 00:03:23,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:03:23,862 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1345 transitions. [2023-03-31 00:03:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-03-31 00:03:23,878 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:03:23,878 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:03:23,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 00:03:24,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:03:24,091 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:03:24,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:03:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash -344559446, now seen corresponding path program 6 times [2023-03-31 00:03:24,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:03:24,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962942847] [2023-03-31 00:03:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:03:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:03:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat