/usr/lib/jvm/java-1.11.0-openjdk-amd64/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 --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:18:29,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:18:29,284 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 10:18:29,289 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:18:29,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:18:29,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:18:29,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:18:29,319 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:18:29,319 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:18:29,323 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:18:29,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:18:29,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:18:29,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:18:29,325 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:18:29,325 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:18:29,326 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:18:29,326 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:18:29,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:18:29,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:18:29,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:18:29,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:18:29,327 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:18:29,327 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:18:29,327 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:18:29,328 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:18:29,328 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:18:29,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:18:29,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:18:29,329 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:18:29,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:18:29,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:18:29,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:18:29,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:18:29,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:18:29,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:18:29,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:18:29,331 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:18:29,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:18:29,331 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:18:29,331 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:18:29,331 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:18:29,332 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:18:29,332 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:18:29,332 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:18:29,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:18:29,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:18:29,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:18:29,580 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:18:29,580 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:18:29,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2023-12-21 10:18:30,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:18:30,864 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:18:30,864 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2023-12-21 10:18:30,870 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e024ef16/2f8d0f17cdc7426d9f57ff771938add7/FLAGd53204552 [2023-12-21 10:18:30,880 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e024ef16/2f8d0f17cdc7426d9f57ff771938add7 [2023-12-21 10:18:30,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:18:30,885 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:18:30,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:18:30,887 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:18:30,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:18:30,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:18:30" (1/1) ... [2023-12-21 10:18:30,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8752dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:30, skipping insertion in model container [2023-12-21 10:18:30,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:18:30" (1/1) ... [2023-12-21 10:18:30,907 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:18:31,039 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c[946,959] [2023-12-21 10:18:31,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:18:31,054 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:18:31,070 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c[946,959] [2023-12-21 10:18:31,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:18:31,084 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:18:31,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31 WrapperNode [2023-12-21 10:18:31,084 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:18:31,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:18:31,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:18:31,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:18:31,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,115 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2023-12-21 10:18:31,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:18:31,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:18:31,116 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:18:31,116 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:18:31,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,133 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,151 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 10:18:31,151 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,151 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,153 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,155 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,156 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,157 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:18:31,158 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:18:31,160 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:18:31,160 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:18:31,161 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (1/1) ... [2023-12-21 10:18:31,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:18:31,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:18:31,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 10:18:31,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 10:18:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:18:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:18:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-12-21 10:18:31,217 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-12-21 10:18:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-12-21 10:18:31,217 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-12-21 10:18:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:18:31,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:18:31,267 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:18:31,269 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:18:31,371 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:18:31,388 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:18:31,388 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-21 10:18:31,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:18:31 BoogieIcfgContainer [2023-12-21 10:18:31,389 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:18:31,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:18:31,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:18:31,393 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:18:31,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:18:30" (1/3) ... [2023-12-21 10:18:31,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16145e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:18:31, skipping insertion in model container [2023-12-21 10:18:31,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:31" (2/3) ... [2023-12-21 10:18:31,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16145e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:18:31, skipping insertion in model container [2023-12-21 10:18:31,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:18:31" (3/3) ... [2023-12-21 10:18:31,396 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2023-12-21 10:18:31,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:18:31,410 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:18:31,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:18:31,454 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=LoopHeads, 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;@7d2325c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:18:31,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:18:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 10:18:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 10:18:31,464 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:18:31,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:18:31,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:18:31,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:18:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash -389521846, now seen corresponding path program 1 times [2023-12-21 10:18:31,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:18:31,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082434168] [2023-12-21 10:18:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:18:31,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:18:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:31,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:18:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:18:31,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:18:31,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082434168] [2023-12-21 10:18:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082434168] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:18:31,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:18:31,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 10:18:31,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763151905] [2023-12-21 10:18:31,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:18:31,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 10:18:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:18:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 10:18:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 10:18:31,864 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:18:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:18:31,978 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-12-21 10:18:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 10:18:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-21 10:18:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:18:31,986 INFO L225 Difference]: With dead ends: 34 [2023-12-21 10:18:31,986 INFO L226 Difference]: Without dead ends: 26 [2023-12-21 10:18:31,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 10:18:31,992 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:18:31,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 73 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:18:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-21 10:18:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-21 10:18:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 10:18:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-21 10:18:32,032 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2023-12-21 10:18:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:18:32,032 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-21 10:18:32,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:18:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-21 10:18:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 10:18:32,034 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:18:32,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:18:32,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 10:18:32,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:18:32,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:18:32,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1524884472, now seen corresponding path program 1 times [2023-12-21 10:18:32,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:18:32,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849785373] [2023-12-21 10:18:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:18:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:18:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:32,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:18:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:18:32,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:18:32,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849785373] [2023-12-21 10:18:32,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849785373] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:18:32,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:18:32,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 10:18:32,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89307297] [2023-12-21 10:18:32,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:18:32,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 10:18:32,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:18:32,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 10:18:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 10:18:32,148 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:18:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:18:32,214 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-12-21 10:18:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 10:18:32,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-21 10:18:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:18:32,216 INFO L225 Difference]: With dead ends: 32 [2023-12-21 10:18:32,216 INFO L226 Difference]: Without dead ends: 28 [2023-12-21 10:18:32,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 10:18:32,217 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:18:32,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:18:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-21 10:18:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-12-21 10:18:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 10:18:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-21 10:18:32,224 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2023-12-21 10:18:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:18:32,225 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-21 10:18:32,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:18:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-21 10:18:32,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 10:18:32,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:18:32,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:18:32,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 10:18:32,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:18:32,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:18:32,229 INFO L85 PathProgramCache]: Analyzing trace with hash 741502751, now seen corresponding path program 1 times [2023-12-21 10:18:32,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:18:32,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686874028] [2023-12-21 10:18:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:18:32,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:18:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:32,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:18:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:32,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:18:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:32,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 10:18:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:18:32,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:18:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686874028] [2023-12-21 10:18:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686874028] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:18:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285146449] [2023-12-21 10:18:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:18:32,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:18:32,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:18:32,380 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) [2023-12-21 10:18:32,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 10:18:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:18:32,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 10:18:32,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:18:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:18:32,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:18:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:18:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285146449] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:18:32,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:18:32,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-12-21 10:18:32,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826450736] [2023-12-21 10:18:32,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:18:32,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:18:32,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:18:32,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:18:32,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-21 10:18:32,700 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 10:18:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:18:32,866 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2023-12-21 10:18:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 10:18:32,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) Word has length 22 [2023-12-21 10:18:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:18:32,870 INFO L225 Difference]: With dead ends: 54 [2023-12-21 10:18:32,871 INFO L226 Difference]: Without dead ends: 30 [2023-12-21 10:18:32,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:18:32,872 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:18:32,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 122 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:18:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-21 10:18:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-12-21 10:18:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 10:18:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-12-21 10:18:32,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 22 [2023-12-21 10:18:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:18:32,880 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-12-21 10:18:32,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 10:18:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-12-21 10:18:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 10:18:32,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:18:32,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:18:32,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 10:18:33,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:18:33,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:18:33,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:18:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1785876995, now seen corresponding path program 1 times [2023-12-21 10:18:33,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:18:33,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946244178] [2023-12-21 10:18:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:18:33,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:18:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 10:18:33,126 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-21 10:18:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 10:18:33,166 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-21 10:18:33,166 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-21 10:18:33,167 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 10:18:33,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-21 10:18:33,172 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-21 10:18:33,176 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 10:18:33,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:18:33 BoogieIcfgContainer [2023-12-21 10:18:33,202 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 10:18:33,203 INFO L158 Benchmark]: Toolchain (without parser) took 2318.10ms. Allocated memory was 188.7MB in the beginning and 245.4MB in the end (delta: 56.6MB). Free memory was 134.5MB in the beginning and 214.0MB in the end (delta: -79.6MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:18:33,203 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 188.7MB. Free memory is still 144.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:18:33,203 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.26ms. Allocated memory is still 188.7MB. Free memory was 134.2MB in the beginning and 123.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 10:18:33,203 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.92ms. Allocated memory is still 188.7MB. Free memory was 123.4MB in the beginning and 122.2MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 10:18:33,204 INFO L158 Benchmark]: Boogie Preprocessor took 40.91ms. Allocated memory is still 188.7MB. Free memory was 121.9MB in the beginning and 120.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 10:18:33,204 INFO L158 Benchmark]: RCFGBuilder took 231.17ms. Allocated memory is still 188.7MB. Free memory was 120.3MB in the beginning and 109.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 10:18:33,204 INFO L158 Benchmark]: TraceAbstraction took 1811.56ms. Allocated memory was 188.7MB in the beginning and 245.4MB in the end (delta: 56.6MB). Free memory was 109.0MB in the beginning and 214.0MB in the end (delta: -105.0MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:18:33,206 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 188.7MB. Free memory is still 144.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.26ms. Allocated memory is still 188.7MB. Free memory was 134.2MB in the beginning and 123.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.92ms. Allocated memory is still 188.7MB. Free memory was 123.4MB in the beginning and 122.2MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.91ms. Allocated memory is still 188.7MB. Free memory was 121.9MB in the beginning and 120.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 231.17ms. Allocated memory is still 188.7MB. Free memory was 120.3MB in the beginning and 109.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1811.56ms. Allocated memory was 188.7MB in the beginning and 245.4MB in the end (delta: 56.6MB). Free memory was 109.0MB in the beginning and 214.0MB in the end (delta: -105.0MB). There was no memory consumed. 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: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 2; VAL [x=2] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [x=2] [L39] int result = fibo1(x); [L40] COND TRUE result == 1 VAL [result=1, x=2] [L41] reach_error() VAL [result=1, x=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 66 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 265 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 202 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 212 IncrementalHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 63 mSDtfsCounter, 212 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, InterpolantAutomatonStates: 20, 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 174 SizeOfPredicates, 2 NumberOfNonLiveVariables, 71 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/12 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! [2023-12-21 10:18:33,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...