/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/reducercommutativity/max.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:46:44,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:46:44,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:46:44,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:46:44,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:46:44,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:46:44,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:46:44,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:46:44,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:46:44,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:46:44,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:46:44,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:46:44,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:46:44,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:46:44,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:46:44,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:46:44,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:46:44,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:46:44,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:46:44,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:46:44,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:46:44,186 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:46:44,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:46:44,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:46:44,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:46:44,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:46:44,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:46:44,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:46:44,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:46:44,188 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:46:44,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:46:44,189 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:46:44,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:46:44,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:46:44,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:46:44,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:46:44,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:46:44,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:46:44,190 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:46:44,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:46:44,190 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:46:44,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:46:44,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:46:44,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:46:44,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:46:44,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:46:44,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:46:44,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:46:44,191 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:46:44,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:46:44,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:46:44,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:46:44,355 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:46:44,355 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:46:44,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max.i [2023-04-01 18:46:45,387 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:46:45,497 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:46:45,497 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max.i [2023-04-01 18:46:45,502 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21d1ce207/2a3fc292c17348b4b94c8205d9d1cb1d/FLAG886b81045 [2023-04-01 18:46:45,513 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21d1ce207/2a3fc292c17348b4b94c8205d9d1cb1d [2023-04-01 18:46:45,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:46:45,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:46:45,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:46:45,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:46:45,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:46:45,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c36d28b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45, skipping insertion in model container [2023-04-01 18:46:45,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:46:45,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:46:45,692 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/reducercommutativity/max.i[1295,1308] [2023-04-01 18:46:45,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:46:45,704 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:46:45,720 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/reducercommutativity/max.i[1295,1308] [2023-04-01 18:46:45,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:46:45,733 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:46:45,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45 WrapperNode [2023-04-01 18:46:45,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:46:45,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:46:45,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:46:45,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:46:45,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,758 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:46:45,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:46:45,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:46:45,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:46:45,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (1/1) ... [2023-04-01 18:46:45,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:46:45,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:45,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:46:45,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:46:45,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:46:45,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:46:45,834 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:46:45,834 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-04-01 18:46:45,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:46:45,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:46:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:46:45,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:46:45,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:46:45,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:46:45,961 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:46:45,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:46:46,081 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:46:46,085 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:46:46,085 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 18:46:46,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:46:46 BoogieIcfgContainer [2023-04-01 18:46:46,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:46:46,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:46:46,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:46:46,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:46:46,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:46:45" (1/3) ... [2023-04-01 18:46:46,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e1f7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:46:46, skipping insertion in model container [2023-04-01 18:46:46,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:45" (2/3) ... [2023-04-01 18:46:46,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e1f7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:46:46, skipping insertion in model container [2023-04-01 18:46:46,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:46:46" (3/3) ... [2023-04-01 18:46:46,092 INFO L112 eAbstractionObserver]: Analyzing ICFG max.i [2023-04-01 18:46:46,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:46:46,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:46:46,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:46:46,138 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;@7d2c352b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:46:46,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:46:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 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) [2023-04-01 18:46:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 18:46:46,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:46,146 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] [2023-04-01 18:46:46,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:46,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:46,150 INFO L85 PathProgramCache]: Analyzing trace with hash -611553102, now seen corresponding path program 1 times [2023-04-01 18:46:46,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:46,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020741450] [2023-04-01 18:46:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:46,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:46:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 18:46:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:46:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 18:46:46,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020741450] [2023-04-01 18:46:46,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020741450] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:46:46,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:46:46,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:46:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461650454] [2023-04-01 18:46:46,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:46:46,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:46:46,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:46:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:46:46,358 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 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) [2023-04-01 18:46:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:46,449 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2023-04-01 18:46:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:46:46,451 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 [2023-04-01 18:46:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:46,457 INFO L225 Difference]: With dead ends: 58 [2023-04-01 18:46:46,457 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 18:46:46,459 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 [2023-04-01 18:46:46,463 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:46,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 18:46:46,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 18:46:46,495 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) [2023-04-01 18:46:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-01 18:46:46,496 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2023-04-01 18:46:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:46,497 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-01 18:46:46,497 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) [2023-04-01 18:46:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-01 18:46:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 18:46:46,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:46,498 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] [2023-04-01 18:46:46,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:46:46,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:46,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:46,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1972515135, now seen corresponding path program 1 times [2023-04-01 18:46:46,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:46,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042710761] [2023-04-01 18:46:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:46,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:46:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 18:46:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:46:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:46:46,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042710761] [2023-04-01 18:46:46,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042710761] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482021964] [2023-04-01 18:46:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:46,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:46,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:46,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:46:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:46,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:46:46,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 18:46:46,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:46:46,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482021964] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:46:46,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:46:46,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-04-01 18:46:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943340969] [2023-04-01 18:46:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:46:46,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:46:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:46:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:46:46,810 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:46:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:46,834 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2023-04-01 18:46:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:46:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2023-04-01 18:46:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:46,835 INFO L225 Difference]: With dead ends: 50 [2023-04-01 18:46:46,835 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:46:46,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:46:46,836 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:46,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:46:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:46:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-04-01 18:46:46,841 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) [2023-04-01 18:46:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 18:46:46,841 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-01 18:46:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:46,842 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 18:46:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:46:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 18:46:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 18:46:46,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:46,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-01 18:46:46,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:47,048 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 [2023-04-01 18:46:47,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:47,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1992112026, now seen corresponding path program 1 times [2023-04-01 18:46:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:47,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944639852] [2023-04-01 18:46:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:47,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:46:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-01 18:46:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 18:46:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 18:46:47,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:47,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944639852] [2023-04-01 18:46:47,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944639852] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:46:47,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:46:47,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:46:47,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021096591] [2023-04-01 18:46:47,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:46:47,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:46:47,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:46:47,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:46:47,225 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:46:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:47,276 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-04-01 18:46:47,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 18:46:47,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2023-04-01 18:46:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:47,277 INFO L225 Difference]: With dead ends: 45 [2023-04-01 18:46:47,277 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 18:46:47,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:46:47,282 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:47,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:46:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 18:46:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-04-01 18:46:47,295 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) [2023-04-01 18:46:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 18:46:47,298 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 44 [2023-04-01 18:46:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:47,299 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 18:46:47,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:46:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 18:46:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 18:46:47,302 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:47,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-01 18:46:47,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 18:46:47,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:47,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1331260152, now seen corresponding path program 1 times [2023-04-01 18:46:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:47,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462969827] [2023-04-01 18:46:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:47,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:46:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-01 18:46:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 18:46:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:46:47,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:47,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462969827] [2023-04-01 18:46:47,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462969827] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:47,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930409235] [2023-04-01 18:46:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:47,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:47,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:47,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:47,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:46:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:47,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 18:46:47,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 18:46:47,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:46:47,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930409235] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:47,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:47,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2023-04-01 18:46:47,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450671725] [2023-04-01 18:46:47,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:47,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 18:46:47,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 18:46:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 18:46:47,716 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 18:46:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:47,823 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2023-04-01 18:46:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 18:46:47,826 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-04-01 18:46:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:47,827 INFO L225 Difference]: With dead ends: 57 [2023-04-01 18:46:47,827 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 18:46:47,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-04-01 18:46:47,828 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:47,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 40 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 18:46:47,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-04-01 18:46:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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) [2023-04-01 18:46:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-04-01 18:46:47,832 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 46 [2023-04-01 18:46:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:47,832 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-04-01 18:46:47,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 18:46:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-04-01 18:46:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 18:46:47,833 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:47,833 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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] [2023-04-01 18:46:47,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:48,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 18:46:48,038 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:48,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:48,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1514965459, now seen corresponding path program 2 times [2023-04-01 18:46:48,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:48,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915232238] [2023-04-01 18:46:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:48,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:48,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:48,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:46:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:48,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 18:46:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:48,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:46:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:46:49,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:49,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915232238] [2023-04-01 18:46:49,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915232238] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:49,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905387044] [2023-04-01 18:46:49,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:46:49,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:49,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:49,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:49,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:46:49,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:46:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:46:49,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 18:46:49,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:49,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 18:46:49,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:46:49,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-04-01 18:46:49,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:46:49,623 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 18:46:49,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:46:49,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2023-04-01 18:46:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:46:49,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:50,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905387044] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:50,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 18:46:50,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 42 [2023-04-01 18:46:50,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344522130] [2023-04-01 18:46:50,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 18:46:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 18:46:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2483, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 18:46:50,488 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 42 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 37 states have internal predecessors, (84), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:46:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:53,216 INFO L93 Difference]: Finished difference Result 202 states and 250 transitions. [2023-04-01 18:46:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-04-01 18:46:53,217 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 37 states have internal predecessors, (84), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2023-04-01 18:46:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:53,219 INFO L225 Difference]: With dead ends: 202 [2023-04-01 18:46:53,219 INFO L226 Difference]: Without dead ends: 174 [2023-04-01 18:46:53,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4411 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1663, Invalid=11677, Unknown=0, NotChecked=0, Total=13340 [2023-04-01 18:46:53,224 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 362 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:53,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 225 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 18:46:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-04-01 18:46:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 126. [2023-04-01 18:46:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 110 states have internal predecessors, (132), 10 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2023-04-01 18:46:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2023-04-01 18:46:53,252 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 58 [2023-04-01 18:46:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:53,253 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2023-04-01 18:46:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 37 states have internal predecessors, (84), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:46:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2023-04-01 18:46:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 18:46:53,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:53,254 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2023-04-01 18:46:53,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:53,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:53,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:53,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:53,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1393798443, now seen corresponding path program 1 times [2023-04-01 18:46:53,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:53,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198205180] [2023-04-01 18:46:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:53,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:54,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:54,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:46:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:54,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 18:46:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat