./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Fibonacci01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b0570f2e0d80d68bc280040cce27f654b3fe7a2c0bad30f9bb811af9ca3d994 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 15:17:36,711 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 15:17:36,813 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 15:17:36,818 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 15:17:36,819 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 15:17:36,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 15:17:36,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 15:17:36,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 15:17:36,850 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 15:17:36,850 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 15:17:36,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 15:17:36,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 15:17:36,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 15:17:36,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 15:17:36,853 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 15:17:36,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 15:17:36,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 15:17:36,854 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 15:17:36,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 15:17:36,855 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 15:17:36,855 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 15:17:36,856 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 15:17:36,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 15:17:36,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 15:17:36,857 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 15:17:36,857 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 15:17:36,857 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 15:17:36,858 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 15:17:36,858 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 15:17:36,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 15:17:36,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 15:17:36,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 15:17:36,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:17:36,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 15:17:36,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 15:17:36,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 15:17:36,860 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 15:17:36,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 15:17:36,861 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 15:17:36,861 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 15:17:36,861 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 15:17:36,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 15:17:36,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b0570f2e0d80d68bc280040cce27f654b3fe7a2c0bad30f9bb811af9ca3d994 [2024-11-08 15:17:37,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 15:17:37,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 15:17:37,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 15:17:37,171 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 15:17:37,172 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 15:17:37,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci01-1.c [2024-11-08 15:17:38,668 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 15:17:38,888 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 15:17:38,890 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c [2024-11-08 15:17:38,899 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f87d3748d/447fcd1b801c46c682b59d0b899c1ca0/FLAG9f55cfa7e [2024-11-08 15:17:38,918 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f87d3748d/447fcd1b801c46c682b59d0b899c1ca0 [2024-11-08 15:17:38,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 15:17:38,924 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 15:17:38,927 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 15:17:38,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 15:17:38,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 15:17:38,934 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:17:38" (1/1) ... [2024-11-08 15:17:38,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f22185e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:38, skipping insertion in model container [2024-11-08 15:17:38,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:17:38" (1/1) ... [2024-11-08 15:17:38,958 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 15:17:39,155 WARN L250 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/Fibonacci01-1.c[804,817] [2024-11-08 15:17:39,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:17:39,171 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 15:17:39,184 WARN L250 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/Fibonacci01-1.c[804,817] [2024-11-08 15:17:39,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:17:39,200 INFO L204 MainTranslator]: Completed translation [2024-11-08 15:17:39,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39 WrapperNode [2024-11-08 15:17:39,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 15:17:39,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 15:17:39,203 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 15:17:39,203 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 15:17:39,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,235 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2024-11-08 15:17:39,236 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 15:17:39,238 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 15:17:39,238 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 15:17:39,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 15:17:39,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,249 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,261 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]. [2024-11-08 15:17:39,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,265 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,271 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,273 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,279 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 15:17:39,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 15:17:39,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 15:17:39,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 15:17:39,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (1/1) ... [2024-11-08 15:17:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:17:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:17:39,323 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) [2024-11-08 15:17:39,328 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 [2024-11-08 15:17:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2024-11-08 15:17:39,379 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2024-11-08 15:17:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 15:17:39,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 15:17:39,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 15:17:39,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 15:17:39,447 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 15:17:39,450 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 15:17:39,593 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-08 15:17:39,593 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 15:17:39,616 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 15:17:39,616 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 15:17:39,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:17:39 BoogieIcfgContainer [2024-11-08 15:17:39,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 15:17:39,621 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 15:17:39,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 15:17:39,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 15:17:39,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 03:17:38" (1/3) ... [2024-11-08 15:17:39,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cdae4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:17:39, skipping insertion in model container [2024-11-08 15:17:39,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:17:39" (2/3) ... [2024-11-08 15:17:39,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cdae4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:17:39, skipping insertion in model container [2024-11-08 15:17:39,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:17:39" (3/3) ... [2024-11-08 15:17:39,630 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2024-11-08 15:17:39,648 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 15:17:39,648 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 15:17:39,717 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 15:17:39,723 INFO L333 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, 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;@35da5b75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 15:17:39,724 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 15:17:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 15:17:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 15:17:39,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:17:39,737 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:17:39,738 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:17:39,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:17:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1939714822, now seen corresponding path program 1 times [2024-11-08 15:17:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:17:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496021780] [2024-11-08 15:17:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:17:39,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:17:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:40,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:17:40,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:17:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496021780] [2024-11-08 15:17:40,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496021780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:17:40,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:17:40,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 15:17:40,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635551077] [2024-11-08 15:17:40,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:17:40,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 15:17:40,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:17:40,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 15:17:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 15:17:40,277 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2024-11-08 15:17:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:17:40,401 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-11-08 15:17:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 15:17:40,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 11 [2024-11-08 15:17:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:17:40,414 INFO L225 Difference]: With dead ends: 31 [2024-11-08 15:17:40,414 INFO L226 Difference]: Without dead ends: 21 [2024-11-08 15:17:40,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 15:17:40,424 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:17:40,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 55 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:17:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-08 15:17:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2024-11-08 15:17:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 15:17:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-08 15:17:40,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2024-11-08 15:17:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:17:40,467 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-08 15:17:40,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2024-11-08 15:17:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-08 15:17:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 15:17:40,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:17:40,470 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:17:40,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 15:17:40,470 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:17:40,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:17:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash 692912656, now seen corresponding path program 1 times [2024-11-08 15:17:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:17:40,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503705319] [2024-11-08 15:17:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:17:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:17:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:40,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:17:40,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:17:40,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503705319] [2024-11-08 15:17:40,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503705319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:17:40,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:17:40,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 15:17:40,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419286254] [2024-11-08 15:17:40,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:17:40,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 15:17:40,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:17:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 15:17:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 15:17:40,693 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-08 15:17:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:17:40,794 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-11-08 15:17:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 15:17:40,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2024-11-08 15:17:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:17:40,796 INFO L225 Difference]: With dead ends: 25 [2024-11-08 15:17:40,796 INFO L226 Difference]: Without dead ends: 21 [2024-11-08 15:17:40,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 15:17:40,798 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:17:40,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:17:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-08 15:17:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2024-11-08 15:17:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 15:17:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-08 15:17:40,809 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2024-11-08 15:17:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:17:40,810 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-08 15:17:40,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-08 15:17:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-08 15:17:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 15:17:40,812 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:17:40,813 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:17:40,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 15:17:40,813 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:17:40,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:17:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash 453332055, now seen corresponding path program 1 times [2024-11-08 15:17:40,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:17:40,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995224813] [2024-11-08 15:17:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:17:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:17:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:40,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:40,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:41,006 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-08 15:17:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:17:41,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:17:41,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995224813] [2024-11-08 15:17:41,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995224813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:17:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875073446] [2024-11-08 15:17:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:17:41,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:17:41,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:17:41,022 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) [2024-11-08 15:17:41,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 15:17:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:41,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 15:17:41,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:17:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:17:41,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:17:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 15:17:41,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875073446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:17:41,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:17:41,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 21 [2024-11-08 15:17:41,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602906647] [2024-11-08 15:17:41,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:17:41,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 15:17:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:17:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 15:17:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-08 15:17:41,844 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-08 15:17:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:17:42,013 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-11-08 15:17:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 15:17:42,015 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 24 [2024-11-08 15:17:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:17:42,015 INFO L225 Difference]: With dead ends: 36 [2024-11-08 15:17:42,016 INFO L226 Difference]: Without dead ends: 21 [2024-11-08 15:17:42,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-11-08 15:17:42,017 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:17:42,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 107 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:17:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-08 15:17:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-08 15:17:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-08 15:17:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-08 15:17:42,035 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 24 [2024-11-08 15:17:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:17:42,035 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-08 15:17:42,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-08 15:17:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-08 15:17:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-08 15:17:42,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:17:42,039 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:17:42,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 15:17:42,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:17:42,244 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:17:42,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:17:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1064754479, now seen corresponding path program 1 times [2024-11-08 15:17:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:17:42,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504561317] [2024-11-08 15:17:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:17:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:17:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:42,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:42,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:42,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-08 15:17:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 15:17:42,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:17:42,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504561317] [2024-11-08 15:17:42,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504561317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:17:42,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255156848] [2024-11-08 15:17:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:17:42,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:17:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:17:42,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:17:42,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 15:17:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:42,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 15:17:42,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:17:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 15:17:42,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:17:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 15:17:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255156848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:17:43,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:17:43,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 20 [2024-11-08 15:17:43,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363957664] [2024-11-08 15:17:43,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:17:43,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 15:17:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:17:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 15:17:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-11-08 15:17:43,097 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-08 15:17:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:17:43,312 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2024-11-08 15:17:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 15:17:43,313 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 25 [2024-11-08 15:17:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:17:43,315 INFO L225 Difference]: With dead ends: 32 [2024-11-08 15:17:43,315 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 15:17:43,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-11-08 15:17:43,319 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:17:43,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 78 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:17:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 15:17:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-08 15:17:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-08 15:17:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-11-08 15:17:43,334 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 25 [2024-11-08 15:17:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:17:43,334 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-11-08 15:17:43,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-08 15:17:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-11-08 15:17:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 15:17:43,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:17:43,336 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:17:43,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 15:17:43,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 15:17:43,540 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:17:43,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:17:43,541 INFO L85 PathProgramCache]: Analyzing trace with hash 484916750, now seen corresponding path program 2 times [2024-11-08 15:17:43,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:17:43,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286397594] [2024-11-08 15:17:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:17:43,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:17:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:43,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:43,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:43,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:43,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-08 15:17:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:43,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-08 15:17:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 15:17:43,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:17:43,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286397594] [2024-11-08 15:17:43,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286397594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:17:43,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036289145] [2024-11-08 15:17:43,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:17:43,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:17:43,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:17:43,712 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:17:43,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 15:17:43,762 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:17:43,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:17:43,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 15:17:43,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:17:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 15:17:43,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:17:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 15:17:44,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036289145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:17:44,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:17:44,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 14 [2024-11-08 15:17:44,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134598412] [2024-11-08 15:17:44,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:17:44,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 15:17:44,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:17:44,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 15:17:44,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-08 15:17:44,068 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-08 15:17:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:17:44,144 INFO L93 Difference]: Finished difference Result 53 states and 77 transitions. [2024-11-08 15:17:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 15:17:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2024-11-08 15:17:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:17:44,146 INFO L225 Difference]: With dead ends: 53 [2024-11-08 15:17:44,146 INFO L226 Difference]: Without dead ends: 31 [2024-11-08 15:17:44,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-11-08 15:17:44,148 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:17:44,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:17:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-08 15:17:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2024-11-08 15:17:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-08 15:17:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-11-08 15:17:44,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 38 [2024-11-08 15:17:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:17:44,162 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-11-08 15:17:44,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-08 15:17:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-11-08 15:17:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 15:17:44,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:17:44,163 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:17:44,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 15:17:44,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:17:44,368 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:17:44,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:17:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash 837439950, now seen corresponding path program 3 times [2024-11-08 15:17:44,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:17:44,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751020924] [2024-11-08 15:17:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:17:44,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:17:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:44,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:44,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:44,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:17:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:44,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-08 15:17:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:44,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-08 15:17:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:17:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-08 15:17:44,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:17:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751020924] [2024-11-08 15:17:44,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751020924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:17:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931739402] [2024-11-08 15:17:44,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 15:17:44,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:17:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:17:44,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:17:44,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 15:17:44,713 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 15:17:44,713 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:17:44,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 15:17:44,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:17:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 15:17:44,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:17:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 15:17:45,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931739402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:17:45,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:17:45,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 25 [2024-11-08 15:17:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986237266] [2024-11-08 15:17:45,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:17:45,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 15:17:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:17:45,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 15:17:45,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-11-08 15:17:45,455 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-08 15:17:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:17:45,731 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2024-11-08 15:17:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 15:17:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 39 [2024-11-08 15:17:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:17:45,733 INFO L225 Difference]: With dead ends: 42 [2024-11-08 15:17:45,733 INFO L226 Difference]: Without dead ends: 0 [2024-11-08 15:17:45,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 15:17:45,735 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:17:45,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:17:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-08 15:17:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-08 15:17:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 15:17:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-08 15:17:45,737 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2024-11-08 15:17:45,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:17:45,737 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-08 15:17:45,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-08 15:17:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-08 15:17:45,737 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-08 15:17:45,743 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-08 15:17:45,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 15:17:45,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:17:45,951 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2024-11-08 15:17:45,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-08 15:17:46,224 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-08 15:17:46,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.11 03:17:46 BoogieIcfgContainer [2024-11-08 15:17:46,247 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-08 15:17:46,247 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-08 15:17:46,247 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-08 15:17:46,247 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-08 15:17:46,248 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:17:39" (3/4) ... [2024-11-08 15:17:46,250 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-08 15:17:46,255 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2024-11-08 15:17:46,260 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-11-08 15:17:46,260 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-08 15:17:46,260 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-08 15:17:46,261 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-08 15:17:46,340 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-08 15:17:46,340 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-08 15:17:46,341 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-08 15:17:46,341 INFO L158 Benchmark]: Toolchain (without parser) took 7417.96ms. Allocated memory was 159.4MB in the beginning and 234.9MB in the end (delta: 75.5MB). Free memory was 101.8MB in the beginning and 127.8MB in the end (delta: -26.1MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. [2024-11-08 15:17:46,342 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory was 118.7MB in the beginning and 118.5MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 15:17:46,342 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.00ms. Allocated memory is still 159.4MB. Free memory was 101.3MB in the beginning and 89.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-08 15:17:46,342 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.24ms. Allocated memory is still 159.4MB. Free memory was 89.5MB in the beginning and 87.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 15:17:46,343 INFO L158 Benchmark]: Boogie Preprocessor took 42.00ms. Allocated memory is still 159.4MB. Free memory was 87.9MB in the beginning and 86.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 15:17:46,343 INFO L158 Benchmark]: RCFGBuilder took 336.01ms. Allocated memory is still 159.4MB. Free memory was 86.2MB in the beginning and 76.2MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-08 15:17:46,344 INFO L158 Benchmark]: TraceAbstraction took 6625.18ms. Allocated memory was 159.4MB in the beginning and 234.9MB in the end (delta: 75.5MB). Free memory was 75.3MB in the beginning and 132.0MB in the end (delta: -56.7MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2024-11-08 15:17:46,345 INFO L158 Benchmark]: Witness Printer took 93.79ms. Allocated memory is still 234.9MB. Free memory was 132.0MB in the beginning and 127.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-08 15:17:46,346 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory was 118.7MB in the beginning and 118.5MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.00ms. Allocated memory is still 159.4MB. Free memory was 101.3MB in the beginning and 89.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.24ms. Allocated memory is still 159.4MB. Free memory was 89.5MB in the beginning and 87.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.00ms. Allocated memory is still 159.4MB. Free memory was 87.9MB in the beginning and 86.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 336.01ms. Allocated memory is still 159.4MB. Free memory was 86.2MB in the beginning and 76.2MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 6625.18ms. Allocated memory was 159.4MB in the beginning and 234.9MB in the end (delta: 75.5MB). Free memory was 75.3MB in the beginning and 132.0MB in the end (delta: -56.7MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * Witness Printer took 93.79ms. Allocated memory is still 234.9MB. Free memory was 132.0MB in the beginning and 127.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: 36]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 6, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 62 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 456 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 368 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 749 IncrementalHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 88 mSDtfsCounter, 749 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 347 GetRequests, 233 SyntacticMatches, 16 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=5, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 275 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 387 ConstructedInterpolants, 0 QuantifiedInterpolants, 1202 SizeOfPredicates, 5 NumberOfNonLiveVariables, 338 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 232/366 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 16]: Procedure Contract for fibonacci Derived contract for procedure fibonacci. Ensures: ((((2 <= n) && (n <= ((long long) \result + 1))) || ((n <= 0) && ((\result == 1) || (\result == 0)))) || ((\result == 1) && (1 == n))) RESULT: Ultimate proved your program to be correct! [2024-11-08 15:17:46,376 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE