/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/recursive-simple/afterrec_2calls-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 04:34:51,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 04:34:51,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 04:34:51,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 04:34:51,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 04:34:51,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 04:34:51,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 04:34:51,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 04:34:51,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 04:34:51,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 04:34:51,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 04:34:51,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 04:34:51,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 04:34:51,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 04:34:51,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 04:34:51,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 04:34:51,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 04:34:51,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 04:34:51,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 04:34:51,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 04:34:51,243 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 [2023-04-02 04:34:51,261 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 04:34:51,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 04:34:51,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 04:34:51,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 04:34:51,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 04:34:51,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 04:34:51,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 04:34:51,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 04:34:51,263 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 04:34:51,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 04:34:51,264 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 04:34:51,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 04:34:51,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 04:34:51,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 04:34:51,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 04:34:51,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 04:34:51,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 04:34:51,264 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 04:34:51,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 04:34:51,265 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 04:34:51,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 04:34:51,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 04:34:51,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 04:34:51,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 04:34:51,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 04:34:51,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 04:34:51,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 04:34:51,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 04:34:51,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 04:34:51,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 04:34:51,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 04:34:51,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 04:34:51,266 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 04:34:51,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 04:34:51,267 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 04:34:51,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 04:34:51,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 04:34:51,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 04:34:51,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 04:34:51,537 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 04:34:51,538 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 04:34:51,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2023-04-02 04:34:52,707 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 04:34:52,921 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 04:34:52,921 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2023-04-02 04:34:52,925 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52c808f7/766f1f1bd5354f9c93c29933589ba442/FLAG876f413f8 [2023-04-02 04:34:52,937 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52c808f7/766f1f1bd5354f9c93c29933589ba442 [2023-04-02 04:34:52,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 04:34:52,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 04:34:52,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 04:34:52,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 04:34:52,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 04:34:52,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:34:52" (1/1) ... [2023-04-02 04:34:52,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a81e884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:52, skipping insertion in model container [2023-04-02 04:34:52,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:34:52" (1/1) ... [2023-04-02 04:34:52,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 04:34:52,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 04:34:53,069 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/recursive-simple/afterrec_2calls-1.c[354,367] [2023-04-02 04:34:53,073 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/recursive-simple/afterrec_2calls-1.c[442,455] [2023-04-02 04:34:53,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 04:34:53,083 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 04:34:53,091 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/recursive-simple/afterrec_2calls-1.c[354,367] [2023-04-02 04:34:53,092 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/recursive-simple/afterrec_2calls-1.c[442,455] [2023-04-02 04:34:53,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 04:34:53,103 INFO L208 MainTranslator]: Completed translation [2023-04-02 04:34:53,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53 WrapperNode [2023-04-02 04:34:53,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 04:34:53,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 04:34:53,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 04:34:53,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 04:34:53,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,123 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 04:34:53,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 04:34:53,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 04:34:53,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 04:34:53,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (1/1) ... [2023-04-02 04:34:53,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 04:34:53,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:53,147 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) [2023-04-02 04:34:53,149 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 [2023-04-02 04:34:53,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 04:34:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 04:34:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 04:34:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-04-02 04:34:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2023-04-02 04:34:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 04:34:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 04:34:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 04:34:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 04:34:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 04:34:53,232 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 04:34:53,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 04:34:53,316 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 04:34:53,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 04:34:53,322 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 04:34:53,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:34:53 BoogieIcfgContainer [2023-04-02 04:34:53,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 04:34:53,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 04:34:53,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 04:34:53,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 04:34:53,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:34:52" (1/3) ... [2023-04-02 04:34:53,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6bcb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:34:53, skipping insertion in model container [2023-04-02 04:34:53,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:53" (2/3) ... [2023-04-02 04:34:53,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6bcb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:34:53, skipping insertion in model container [2023-04-02 04:34:53,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:34:53" (3/3) ... [2023-04-02 04:34:53,332 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2023-04-02 04:34:53,364 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 04:34:53,364 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-04-02 04:34:53,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 04:34:53,424 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;@4d45258d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 04:34:53,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-04-02 04:34:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 04:34:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 04:34:53,433 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:53,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:53,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:53,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:53,438 INFO L85 PathProgramCache]: Analyzing trace with hash -900640831, now seen corresponding path program 1 times [2023-04-02 04:34:53,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:53,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872933848] [2023-04-02 04:34:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:53,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:53,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:53,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 04:34:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:53,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872933848] [2023-04-02 04:34:53,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872933848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 04:34:53,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 04:34:53,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 04:34:53,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934458251] [2023-04-02 04:34:53,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 04:34:53,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 04:34:53,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 04:34:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 04:34:53,921 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 04:34:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:54,132 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-04-02 04:34:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 04:34:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-04-02 04:34:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:54,140 INFO L225 Difference]: With dead ends: 35 [2023-04-02 04:34:54,140 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 04:34:54,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-02 04:34:54,154 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:54,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:34:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 04:34:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 04:34:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 04:34:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-04-02 04:34:54,196 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2023-04-02 04:34:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:54,196 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-04-02 04:34:54,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 04:34:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-04-02 04:34:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 04:34:54,198 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:54,198 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:54,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 04:34:54,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:54,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 817530876, now seen corresponding path program 1 times [2023-04-02 04:34:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83950827] [2023-04-02 04:34:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 04:34:54,212 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 04:34:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 04:34:54,235 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-04-02 04:34:54,236 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 04:34:54,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-04-02 04:34:54,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location fErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-04-02 04:34:54,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 04:34:54,242 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-04-02 04:34:54,245 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 04:34:54,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 04:34:54 BoogieIcfgContainer [2023-04-02 04:34:54,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 04:34:54,260 INFO L158 Benchmark]: Toolchain (without parser) took 1319.98ms. Allocated memory is still 290.5MB. Free memory was 255.1MB in the beginning and 194.8MB in the end (delta: 60.3MB). Peak memory consumption was 59.8MB. Max. memory is 8.0GB. [2023-04-02 04:34:54,261 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 124.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 04:34:54,261 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.58ms. Allocated memory is still 290.5MB. Free memory was 255.1MB in the beginning and 245.2MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-02 04:34:54,262 INFO L158 Benchmark]: Boogie Preprocessor took 19.69ms. Allocated memory is still 290.5MB. Free memory was 245.2MB in the beginning and 243.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 04:34:54,262 INFO L158 Benchmark]: RCFGBuilder took 199.04ms. Allocated memory is still 290.5MB. Free memory was 243.6MB in the beginning and 233.6MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-02 04:34:54,262 INFO L158 Benchmark]: TraceAbstraction took 934.05ms. Allocated memory is still 290.5MB. Free memory was 233.1MB in the beginning and 194.8MB in the end (delta: 38.3MB). Peak memory consumption was 37.7MB. Max. memory is 8.0GB. [2023-04-02 04:34:54,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 124.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 162.58ms. Allocated memory is still 290.5MB. Free memory was 255.1MB in the beginning and 245.2MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.69ms. Allocated memory is still 290.5MB. Free memory was 245.2MB in the beginning and 243.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 199.04ms. Allocated memory is still 290.5MB. Free memory was 243.6MB in the beginning and 233.6MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 934.05ms. Allocated memory is still 290.5MB. Free memory was 233.1MB in the beginning and 194.8MB in the end (delta: 38.3MB). Peak memory consumption was 37.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] CALL f(4) VAL [\old(n)=4] [L9] COND FALSE !(n<3) [L10] n-- VAL [\old(n)=4, n=3] [L11] CALL f2(n) VAL [\old(n)=3] [L16] COND FALSE !(n<3) [L17] n-- VAL [\old(n)=3, n=2] [L18] CALL f(n) VAL [\old(n)=2] [L9] COND TRUE n<3 VAL [\old(n)=2, n=2] [L18] RET f(n) VAL [\old(n)=3, n=2] [L19] reach_error() VAL [\old(n)=3, n=2] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 22 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 71 IncrementalHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 5 mSDtfsCounter, 71 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 31 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-02 04:34:54,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...