/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/array-crafted/mapsum3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:20:55,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:20:55,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:20:55,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:20:55,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:20:55,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:20:55,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:20:55,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:20:55,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:20:55,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:20:55,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:20:55,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:20:55,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:20:55,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:20:55,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:20:55,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:20:55,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:20:55,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:20:55,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:20:55,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:20:55,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:20:55,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:20:55,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:20:55,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:20:55,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:20:55,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:20:55,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:20:55,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:20:55,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:20:55,914 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:20:55,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:20:55,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:20:55,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:20:55,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:20:55,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:20:55,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:20:55,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:20:55,917 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:20:55,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:20:55,917 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:20:55,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:20:55,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:20:55,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:20:55,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:20:55,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:20:55,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:20:55,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:20:55,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:20:55,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:20:55,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:20:55,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:20:55,920 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:20:55,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:20:55,920 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:20:55,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:20:55,920 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:20:55,920 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:20:56,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:20:56,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:20:56,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:20:56,173 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:20:56,173 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:20:56,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum3.i [2023-03-30 22:20:57,223 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:20:57,441 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:20:57,441 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum3.i [2023-03-30 22:20:57,447 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fad33fda7/8fd69563e6d5495e9ba3f12f73282dc2/FLAGc7487ea76 [2023-03-30 22:20:57,465 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fad33fda7/8fd69563e6d5495e9ba3f12f73282dc2 [2023-03-30 22:20:57,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:20:57,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:20:57,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:20:57,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:20:57,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:20:57,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@417d5104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57, skipping insertion in model container [2023-03-30 22:20:57,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:20:57,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:20:57,643 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/array-crafted/mapsum3.i[1312,1325] [2023-03-30 22:20:57,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:20:57,657 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:20:57,674 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/array-crafted/mapsum3.i[1312,1325] [2023-03-30 22:20:57,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:20:57,687 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:20:57,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57 WrapperNode [2023-03-30 22:20:57,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:20:57,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:20:57,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:20:57,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:20:57,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,724 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:20:57,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:20:57,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:20:57,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:20:57,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (1/1) ... [2023-03-30 22:20:57,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:20:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:20:57,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:20:57,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:20:57,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:20:57,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:20:57,788 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:20:57,789 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2023-03-30 22:20:57,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:20:57,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:20:57,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:20:57,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:20:57,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:20:57,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:20:57,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:20:57,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:20:57,866 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:20:57,868 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:20:58,051 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:20:58,056 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:20:58,056 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:20:58,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:20:58 BoogieIcfgContainer [2023-03-30 22:20:58,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:20:58,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:20:58,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:20:58,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:20:58,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:20:57" (1/3) ... [2023-03-30 22:20:58,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7648a235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:20:58, skipping insertion in model container [2023-03-30 22:20:58,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:20:57" (2/3) ... [2023-03-30 22:20:58,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7648a235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:20:58, skipping insertion in model container [2023-03-30 22:20:58,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:20:58" (3/3) ... [2023-03-30 22:20:58,064 INFO L112 eAbstractionObserver]: Analyzing ICFG mapsum3.i [2023-03-30 22:20:58,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:20:58,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:20:58,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:20:58,120 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;@66d30beb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:20:58,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:20:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:20:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-30 22:20:58,129 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:20:58,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:20:58,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:20:58,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:20:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1514933818, now seen corresponding path program 1 times [2023-03-30 22:20:58,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:20:58,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251100947] [2023-03-30 22:20:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:20:58,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:20:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:20:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:20:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-03-30 22:20:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-03-30 22:20:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:20:58,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:20:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251100947] [2023-03-30 22:20:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251100947] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:20:58,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:20:58,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:20:58,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4421682] [2023-03-30 22:20:58,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:20:58,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:20:58,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:20:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:20:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:20:58,491 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:20:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:20:58,610 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-03-30 22:20:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:20:58,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-03-30 22:20:58,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:20:58,617 INFO L225 Difference]: With dead ends: 54 [2023-03-30 22:20:58,617 INFO L226 Difference]: Without dead ends: 26 [2023-03-30 22:20:58,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:20:58,622 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:20:58,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:20:58,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-30 22:20:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-30 22:20:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:20:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-03-30 22:20:58,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2023-03-30 22:20:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:20:58,675 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-03-30 22:20:58,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:20:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-03-30 22:20:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-30 22:20:58,680 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:20:58,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:20:58,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:20:58,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:20:58,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:20:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash -649748416, now seen corresponding path program 1 times [2023-03-30 22:20:58,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:20:58,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317572843] [2023-03-30 22:20:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:20:58,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:20:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:20:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:20:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-03-30 22:20:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-03-30 22:20:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:20:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:20:58,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317572843] [2023-03-30 22:20:58,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317572843] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:20:58,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795964073] [2023-03-30 22:20:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:20:58,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:20:58,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:20:58,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:20:58,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:20:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 22:20:59,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:20:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:20:59,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:20:59,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795964073] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:20:59,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:20:59,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:20:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166775033] [2023-03-30 22:20:59,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:20:59,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:20:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:20:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:20:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:20:59,064 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:20:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:20:59,076 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-03-30 22:20:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:20:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-03-30 22:20:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:20:59,078 INFO L225 Difference]: With dead ends: 46 [2023-03-30 22:20:59,078 INFO L226 Difference]: Without dead ends: 28 [2023-03-30 22:20:59,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:20:59,080 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:20:59,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:20:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-30 22:20:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-03-30 22:20:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:20:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-03-30 22:20:59,091 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2023-03-30 22:20:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:20:59,092 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-03-30 22:20:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:20:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-03-30 22:20:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-30 22:20:59,093 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:20:59,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:20:59,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:20:59,293 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 [2023-03-30 22:20:59,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:20:59,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:20:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash 506973090, now seen corresponding path program 1 times [2023-03-30 22:20:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:20:59,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769225234] [2023-03-30 22:20:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:20:59,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:20:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:20:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-03-30 22:20:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-03-30 22:20:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:20:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:20:59,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:20:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769225234] [2023-03-30 22:20:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769225234] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:20:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398488907] [2023-03-30 22:20:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:20:59,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:20:59,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:20:59,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:20:59,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:20:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 22:20:59,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:20:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:20:59,539 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:20:59,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398488907] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:20:59,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:20:59,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-03-30 22:20:59,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052236570] [2023-03-30 22:20:59,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:20:59,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:20:59,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:20:59,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:20:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:20:59,542 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:20:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:20:59,553 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-03-30 22:20:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:20:59,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-03-30 22:20:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:20:59,554 INFO L225 Difference]: With dead ends: 46 [2023-03-30 22:20:59,554 INFO L226 Difference]: Without dead ends: 29 [2023-03-30 22:20:59,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:20:59,556 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:20:59,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:20:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-30 22:20:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-03-30 22:20:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:20:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-03-30 22:20:59,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2023-03-30 22:20:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:20:59,562 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-03-30 22:20:59,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:20:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-03-30 22:20:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-30 22:20:59,563 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:20:59,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:20:59,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 22:20:59,768 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 [2023-03-30 22:20:59,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:20:59,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:20:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1359785280, now seen corresponding path program 1 times [2023-03-30 22:20:59,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:20:59,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997256432] [2023-03-30 22:20:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:20:59,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:20:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:20:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-03-30 22:20:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-03-30 22:20:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:20:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-03-30 22:20:59,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:20:59,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997256432] [2023-03-30 22:20:59,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997256432] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:20:59,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372947710] [2023-03-30 22:20:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:20:59,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:20:59,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:20:59,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:20:59,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:20:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:20:59,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 22:20:59,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:21:00,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:21:00,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372947710] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:21:00,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:21:00,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:21:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750194173] [2023-03-30 22:21:00,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:21:00,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:21:00,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:21:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:21:00,019 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:21:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:00,039 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-03-30 22:21:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:21:00,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-03-30 22:21:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:00,043 INFO L225 Difference]: With dead ends: 43 [2023-03-30 22:21:00,043 INFO L226 Difference]: Without dead ends: 30 [2023-03-30 22:21:00,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:21:00,045 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:00,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:21:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-30 22:21:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-03-30 22:21:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-03-30 22:21:00,058 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2023-03-30 22:21:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:00,059 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-03-30 22:21:00,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:21:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-03-30 22:21:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-30 22:21:00,062 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:00,062 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:00,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:00,267 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 [2023-03-30 22:21:00,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:00,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1659776706, now seen corresponding path program 1 times [2023-03-30 22:21:00,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:00,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519948954] [2023-03-30 22:21:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:00,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-03-30 22:21:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-03-30 22:21:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-03-30 22:21:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:21:00,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:00,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519948954] [2023-03-30 22:21:00,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519948954] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:00,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759976099] [2023-03-30 22:21:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:00,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:00,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:00,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:00,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:21:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:21:00,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:21:00,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:21:00,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759976099] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:00,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:00,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:21:00,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936016910] [2023-03-30 22:21:00,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:00,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:21:00,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:21:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:21:00,553 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:00,678 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-03-30 22:21:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:21:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-03-30 22:21:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:00,682 INFO L225 Difference]: With dead ends: 55 [2023-03-30 22:21:00,682 INFO L226 Difference]: Without dead ends: 35 [2023-03-30 22:21:00,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:21:00,685 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:00,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:21:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-30 22:21:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-30 22:21:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-03-30 22:21:00,703 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2023-03-30 22:21:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:00,703 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-03-30 22:21:00,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-03-30 22:21:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-30 22:21:00,705 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:00,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:00,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:00,910 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 [2023-03-30 22:21:00,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:00,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:00,911 INFO L85 PathProgramCache]: Analyzing trace with hash -174953884, now seen corresponding path program 2 times [2023-03-30 22:21:00,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:00,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769574583] [2023-03-30 22:21:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:00,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-03-30 22:21:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-03-30 22:21:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-03-30 22:21:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-03-30 22:21:01,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:01,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769574583] [2023-03-30 22:21:01,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769574583] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:01,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983954139] [2023-03-30 22:21:01,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:21:01,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:01,006 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:01,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:21:01,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:21:01,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:21:01,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:21:01,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:21:01,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:21:01,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983954139] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:01,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:01,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-03-30 22:21:01,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145942603] [2023-03-30 22:21:01,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:01,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:21:01,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:21:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:21:01,224 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-30 22:21:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:01,449 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2023-03-30 22:21:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:21:01,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-03-30 22:21:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:01,452 INFO L225 Difference]: With dead ends: 70 [2023-03-30 22:21:01,452 INFO L226 Difference]: Without dead ends: 50 [2023-03-30 22:21:01,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2023-03-30 22:21:01,455 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 22 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 [2023-03-30 22:21:01,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 22 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:21:01,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-30 22:21:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-03-30 22:21:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-03-30 22:21:01,467 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2023-03-30 22:21:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:01,468 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-03-30 22:21:01,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-30 22:21:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-03-30 22:21:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-30 22:21:01,469 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:01,469 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:01,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:01,675 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 [2023-03-30 22:21:01,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:01,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1165450546, now seen corresponding path program 3 times [2023-03-30 22:21:01,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:01,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532426328] [2023-03-30 22:21:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:01,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:01,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:21:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:01,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-30 22:21:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:01,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-03-30 22:21:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-03-30 22:21:01,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:01,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532426328] [2023-03-30 22:21:01,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532426328] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:01,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056949079] [2023-03-30 22:21:01,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:21:01,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:01,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:01,786 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:01,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:21:01,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:21:01,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:21:01,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:21:01,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-03-30 22:21:01,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-03-30 22:21:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056949079] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:01,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:01,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:21:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558523631] [2023-03-30 22:21:01,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:01,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:21:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:21:01,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:21:01,933 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-30 22:21:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:02,033 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2023-03-30 22:21:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:21:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-03-30 22:21:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:02,034 INFO L225 Difference]: With dead ends: 70 [2023-03-30 22:21:02,034 INFO L226 Difference]: Without dead ends: 55 [2023-03-30 22:21:02,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:21:02,035 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:02,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:21:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-30 22:21:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-03-30 22:21:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-03-30 22:21:02,042 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2023-03-30 22:21:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:02,042 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-03-30 22:21:02,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-30 22:21:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-03-30 22:21:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-30 22:21:02,043 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:02,043 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:02,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:02,253 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 [2023-03-30 22:21:02,254 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:02,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1875202744, now seen corresponding path program 4 times [2023-03-30 22:21:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:02,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387644299] [2023-03-30 22:21:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:02,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:02,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:02,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:21:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:02,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-30 22:21:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:02,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-03-30 22:21:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-03-30 22:21:02,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:02,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387644299] [2023-03-30 22:21:02,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387644299] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:02,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816458683] [2023-03-30 22:21:02,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:21:02,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:02,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:02,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:02,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:21:02,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:21:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:21:02,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:21:02,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-03-30 22:21:02,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-03-30 22:21:02,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816458683] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:02,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:02,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-03-30 22:21:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141318648] [2023-03-30 22:21:02,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:02,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-30 22:21:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-30 22:21:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-03-30 22:21:02,716 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:03,010 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2023-03-30 22:21:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 22:21:03,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2023-03-30 22:21:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:03,013 INFO L225 Difference]: With dead ends: 94 [2023-03-30 22:21:03,013 INFO L226 Difference]: Without dead ends: 66 [2023-03-30 22:21:03,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2023-03-30 22:21:03,014 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:03,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:21:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-03-30 22:21:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-03-30 22:21:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-03-30 22:21:03,022 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2023-03-30 22:21:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:03,023 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-03-30 22:21:03,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-03-30 22:21:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-30 22:21:03,024 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:03,024 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:03,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:03,239 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 [2023-03-30 22:21:03,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:03,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1395321890, now seen corresponding path program 5 times [2023-03-30 22:21:03,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:03,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658949271] [2023-03-30 22:21:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:03,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:03,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:21:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:03,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-30 22:21:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:03,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-03-30 22:21:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-03-30 22:21:03,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:03,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658949271] [2023-03-30 22:21:03,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658949271] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708591622] [2023-03-30 22:21:03,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:21:03,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:03,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:03,598 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:03,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:21:04,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-03-30 22:21:04,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:21:04,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:21:04,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-03-30 22:21:04,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-03-30 22:21:04,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708591622] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:04,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:04,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-03-30 22:21:04,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307137994] [2023-03-30 22:21:04,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:04,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-03-30 22:21:04,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:04,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-03-30 22:21:04,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-03-30 22:21:04,363 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:04,882 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2023-03-30 22:21:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-30 22:21:04,883 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 98 [2023-03-30 22:21:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:04,884 INFO L225 Difference]: With dead ends: 120 [2023-03-30 22:21:04,884 INFO L226 Difference]: Without dead ends: 84 [2023-03-30 22:21:04,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2023-03-30 22:21:04,886 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:04,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 37 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:21:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-03-30 22:21:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-03-30 22:21:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2023-03-30 22:21:04,895 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2023-03-30 22:21:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:04,895 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2023-03-30 22:21:04,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2023-03-30 22:21:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-03-30 22:21:04,896 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:04,896 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:04,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:05,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-03-30 22:21:05,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:05,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:05,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1900162548, now seen corresponding path program 6 times [2023-03-30 22:21:05,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:05,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158924502] [2023-03-30 22:21:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:05,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:05,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-03-30 22:21:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:05,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-03-30 22:21:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:05,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-03-30 22:21:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2023-03-30 22:21:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158924502] [2023-03-30 22:21:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158924502] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341197266] [2023-03-30 22:21:05,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:21:05,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:05,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:05,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:05,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:21:05,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-03-30 22:21:05,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:21:05,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:21:05,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2023-03-30 22:21:05,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2023-03-30 22:21:06,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341197266] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:06,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:06,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2023-03-30 22:21:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438564266] [2023-03-30 22:21:06,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:21:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:21:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:21:06,015 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:06,561 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2023-03-30 22:21:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-03-30 22:21:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2023-03-30 22:21:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:06,562 INFO L225 Difference]: With dead ends: 150 [2023-03-30 22:21:06,562 INFO L226 Difference]: Without dead ends: 98 [2023-03-30 22:21:06,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2023-03-30 22:21:06,564 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:06,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 42 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:21:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-03-30 22:21:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-03-30 22:21:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2023-03-30 22:21:06,572 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2023-03-30 22:21:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:06,575 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2023-03-30 22:21:06,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2023-03-30 22:21:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-03-30 22:21:06,577 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:06,578 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:06,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-03-30 22:21:06,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 22:21:06,792 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:06,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:06,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1619870154, now seen corresponding path program 7 times [2023-03-30 22:21:06,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:06,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836053421] [2023-03-30 22:21:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:06,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:07,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:07,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-03-30 22:21:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:07,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-30 22:21:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:07,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-03-30 22:21:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-03-30 22:21:07,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:07,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836053421] [2023-03-30 22:21:07,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836053421] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:07,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731416473] [2023-03-30 22:21:07,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:21:07,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:07,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:07,268 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:07,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 22:21:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:07,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 22:21:07,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-03-30 22:21:07,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-03-30 22:21:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731416473] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:07,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:07,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2023-03-30 22:21:07,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802273874] [2023-03-30 22:21:07,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:07,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-03-30 22:21:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-03-30 22:21:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2023-03-30 22:21:07,803 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:08,379 INFO L93 Difference]: Finished difference Result 191 states and 213 transitions. [2023-03-30 22:21:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-03-30 22:21:08,380 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 162 [2023-03-30 22:21:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:08,381 INFO L225 Difference]: With dead ends: 191 [2023-03-30 22:21:08,381 INFO L226 Difference]: Without dead ends: 127 [2023-03-30 22:21:08,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2023-03-30 22:21:08,383 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 79 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:08,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 42 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:21:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-03-30 22:21:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-03-30 22:21:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2023-03-30 22:21:08,403 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 162 [2023-03-30 22:21:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:08,403 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2023-03-30 22:21:08,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2023-03-30 22:21:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-03-30 22:21:08,405 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:08,405 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 28, 28, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:08,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:08,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-30 22:21:08,611 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:08,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 647770248, now seen corresponding path program 8 times [2023-03-30 22:21:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:08,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114080835] [2023-03-30 22:21:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:09,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-03-30 22:21:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:09,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-03-30 22:21:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:09,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2023-03-30 22:21:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-03-30 22:21:09,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114080835] [2023-03-30 22:21:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114080835] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285763564] [2023-03-30 22:21:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:21:09,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:09,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:09,698 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 22:21:09,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:21:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:21:09,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2023-03-30 22:21:09,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-03-30 22:21:09,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-03-30 22:21:11,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285763564] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:11,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:11,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2023-03-30 22:21:11,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926340553] [2023-03-30 22:21:11,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:11,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-03-30 22:21:11,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-03-30 22:21:11,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2023-03-30 22:21:11,080 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:12,789 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2023-03-30 22:21:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-03-30 22:21:12,790 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 192 [2023-03-30 22:21:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:12,791 INFO L225 Difference]: With dead ends: 251 [2023-03-30 22:21:12,791 INFO L226 Difference]: Without dead ends: 187 [2023-03-30 22:21:12,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2023-03-30 22:21:12,795 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:12,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 27 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:21:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-03-30 22:21:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-03-30 22:21:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2023-03-30 22:21:12,804 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 192 [2023-03-30 22:21:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:12,805 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2023-03-30 22:21:12,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2023-03-30 22:21:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-03-30 22:21:12,807 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:12,807 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:12,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:13,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 22:21:13,013 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:13,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1699853180, now seen corresponding path program 9 times [2023-03-30 22:21:13,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:13,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179967087] [2023-03-30 22:21:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:13,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:15,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-03-30 22:21:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:15,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-03-30 22:21:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:15,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2023-03-30 22:21:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-03-30 22:21:15,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179967087] [2023-03-30 22:21:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179967087] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:15,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646703399] [2023-03-30 22:21:15,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:21:15,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:15,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:15,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 22:21:16,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-03-30 22:21:16,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:21:16,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:21:16,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 4377 trivial. 0 not checked. [2023-03-30 22:21:16,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5227 trivial. 0 not checked. [2023-03-30 22:21:17,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646703399] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:17,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:17,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 13, 13] total 84 [2023-03-30 22:21:17,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135654622] [2023-03-30 22:21:17,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:17,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-03-30 22:21:17,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-03-30 22:21:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=4865, Unknown=0, NotChecked=0, Total=6972 [2023-03-30 22:21:17,405 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:20,131 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2023-03-30 22:21:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-03-30 22:21:20,131 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 252 [2023-03-30 22:21:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:20,133 INFO L225 Difference]: With dead ends: 278 [2023-03-30 22:21:20,133 INFO L226 Difference]: Without dead ends: 214 [2023-03-30 22:21:20,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6315, Invalid=20745, Unknown=0, NotChecked=0, Total=27060 [2023-03-30 22:21:20,139 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 186 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:20,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 57 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:21:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-03-30 22:21:20,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2023-03-30 22:21:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 205 states have (on average 1.0146341463414634) internal successors, (208), 205 states have internal predecessors, (208), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2023-03-30 22:21:20,149 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 252 [2023-03-30 22:21:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:20,149 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2023-03-30 22:21:20,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2023-03-30 22:21:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-03-30 22:21:20,152 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:20,152 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:20,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:20,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-30 22:21:20,360 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:20,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:20,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1252199886, now seen corresponding path program 10 times [2023-03-30 22:21:20,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886963391] [2023-03-30 22:21:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:20,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:23,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:23,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-03-30 22:21:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:23,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-03-30 22:21:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:23,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2023-03-30 22:21:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2023-03-30 22:21:23,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:23,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886963391] [2023-03-30 22:21:23,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886963391] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:23,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731330378] [2023-03-30 22:21:23,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:21:23,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:23,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:23,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:23,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-30 22:21:23,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:21:23,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:21:23,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-30 22:21:23,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:21:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2023-03-30 22:21:23,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:21:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2023-03-30 22:21:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731330378] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:21:24,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:21:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 17, 17] total 93 [2023-03-30 22:21:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62392154] [2023-03-30 22:21:24,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:21:24,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-03-30 22:21:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:21:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-03-30 22:21:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2388, Invalid=6168, Unknown=0, NotChecked=0, Total=8556 [2023-03-30 22:21:24,594 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:21:27,730 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2023-03-30 22:21:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-03-30 22:21:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 278 [2023-03-30 22:21:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:21:27,732 INFO L225 Difference]: With dead ends: 336 [2023-03-30 22:21:27,732 INFO L226 Difference]: Without dead ends: 248 [2023-03-30 22:21:27,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7158, Invalid=26148, Unknown=0, NotChecked=0, Total=33306 [2023-03-30 22:21:27,734 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 204 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:21:27,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 62 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:21:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-03-30 22:21:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2023-03-30 22:21:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:21:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2023-03-30 22:21:27,746 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 278 [2023-03-30 22:21:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:21:27,746 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2023-03-30 22:21:27,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-30 22:21:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2023-03-30 22:21:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-03-30 22:21:27,751 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:21:27,751 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:21:27,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-30 22:21:27,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-03-30 22:21:27,958 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:21:27,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:21:27,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1645049456, now seen corresponding path program 11 times [2023-03-30 22:21:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:21:27,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525578344] [2023-03-30 22:21:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:21:27,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:21:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:30,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:21:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:30,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-03-30 22:21:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:30,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2023-03-30 22:21:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:30,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-03-30 22:21:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:21:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12379 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2023-03-30 22:21:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:21:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525578344] [2023-03-30 22:21:30,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525578344] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:21:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376034528] [2023-03-30 22:21:30,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:21:30,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:21:30,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:21:30,785 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:21:30,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process