./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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-simple/fibo_2calls_15-1.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 532954920d93df80ec8903cd7069d46bd3e41c8f10c6c2a8e6416a137735480b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:24:13,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:24:13,954 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:24:13,959 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:24:13,961 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:24:13,988 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:24:13,990 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:24:13,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:24:13,991 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:24:13,992 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:24:13,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:24:14,011 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:24:14,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:24:14,012 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:24:14,012 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:24:14,012 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:24:14,013 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:24:14,013 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:24:14,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:24:14,013 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:24:14,014 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:24:14,014 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:24:14,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:24:14,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:24:14,015 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:24:14,015 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:24:14,016 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:24:14,016 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:24:14,016 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:24:14,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:24:14,017 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:24:14,017 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:24:14,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:24:14,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:24:14,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:24:14,018 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:24:14,018 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:24:14,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:24:14,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:24:14,019 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:24:14,019 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:24:14,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:24:14,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 532954920d93df80ec8903cd7069d46bd3e41c8f10c6c2a8e6416a137735480b [2024-11-18 14:24:14,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:24:14,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:24:14,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:24:14,252 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:24:14,253 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:24:14,253 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c [2024-11-18 14:24:15,571 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:24:15,729 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:24:15,730 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c [2024-11-18 14:24:15,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bc42751/2f1b016d28cf4bf692d772f955cefd7d/FLAG371b08c0e [2024-11-18 14:24:15,754 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bc42751/2f1b016d28cf4bf692d772f955cefd7d [2024-11-18 14:24:15,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:24:15,758 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:24:15,759 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:24:15,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:24:15,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:24:15,764 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:15,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49aba90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15, skipping insertion in model container [2024-11-18 14:24:15,765 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:15,781 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:24:15,936 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-simple/fibo_2calls_15-1.c[950,963] [2024-11-18 14:24:15,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:24:15,950 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:24:15,962 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-simple/fibo_2calls_15-1.c[950,963] [2024-11-18 14:24:15,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:24:15,977 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:24:15,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15 WrapperNode [2024-11-18 14:24:15,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:24:15,978 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:24:15,979 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:24:15,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:24:15,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:15,988 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,002 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-18 14:24:16,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:24:16,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:24:16,005 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:24:16,005 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:24:16,013 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,015 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,023 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]. [2024-11-18 14:24:16,023 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,023 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,025 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,028 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:24:16,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:24:16,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:24:16,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:24:16,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (1/1) ... [2024-11-18 14:24:16,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:24:16,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:16,061 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) [2024-11-18 14:24:16,063 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 [2024-11-18 14:24:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:24:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:24:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-18 14:24:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-18 14:24:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-18 14:24:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-18 14:24:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:24:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:24:16,146 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:24:16,147 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:24:16,315 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-18 14:24:16,318 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:24:16,328 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:24:16,329 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:24:16,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:24:16 BoogieIcfgContainer [2024-11-18 14:24:16,329 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:24:16,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:24:16,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:24:16,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:24:16,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:24:15" (1/3) ... [2024-11-18 14:24:16,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3304b5df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:24:16, skipping insertion in model container [2024-11-18 14:24:16,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:15" (2/3) ... [2024-11-18 14:24:16,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3304b5df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:24:16, skipping insertion in model container [2024-11-18 14:24:16,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:24:16" (3/3) ... [2024-11-18 14:24:16,337 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-1.c [2024-11-18 14:24:16,350 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:24:16,350 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:24:16,393 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:24:16,398 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;@2202731d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:24:16,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:24:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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) [2024-11-18 14:24:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-18 14:24:16,409 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:16,410 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:16,410 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:16,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:16,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-11-18 14:24:16,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:16,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212103650] [2024-11-18 14:24:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:16,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:24:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212103650] [2024-11-18 14:24:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212103650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:24:16,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:24:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:24:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103741216] [2024-11-18 14:24:16,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:24:16,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:24:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:24:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:24:16,649 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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, 5 states have (on average 1.6) 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) [2024-11-18 14:24:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:16,688 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-18 14:24:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:24:16,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 [2024-11-18 14:24:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:16,697 INFO L225 Difference]: With dead ends: 39 [2024-11-18 14:24:16,698 INFO L226 Difference]: Without dead ends: 27 [2024-11-18 14:24:16,699 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:24:16,702 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:16,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:24:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-18 14:24:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-18 14:24:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2024-11-18 14:24:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-18 14:24:16,730 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-11-18 14:24:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:16,730 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-18 14:24:16,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) 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) [2024-11-18 14:24:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-18 14:24:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-18 14:24:16,731 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:16,731 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:16,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:24:16,732 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:16,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-11-18 14:24:16,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:16,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85826045] [2024-11-18 14:24:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:16,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:24:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85826045] [2024-11-18 14:24:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85826045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:24:16,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:24:16,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:24:16,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510558684] [2024-11-18 14:24:16,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:24:16,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:24:16,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:24:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:24:16,827 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2024-11-18 14:24:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:16,848 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-18 14:24:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:24:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2024-11-18 14:24:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:16,851 INFO L225 Difference]: With dead ends: 33 [2024-11-18 14:24:16,851 INFO L226 Difference]: Without dead ends: 29 [2024-11-18 14:24:16,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:24:16,852 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:16,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:24:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-18 14:24:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-18 14:24:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2024-11-18 14:24:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-18 14:24:16,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-11-18 14:24:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:16,863 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-18 14:24:16,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2024-11-18 14:24:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-18 14:24:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-18 14:24:16,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:16,865 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:16,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:24:16,865 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:16,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-11-18 14:24:16,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:16,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858426338] [2024-11-18 14:24:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 14:24:17,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858426338] [2024-11-18 14:24:17,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858426338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975961512] [2024-11-18 14:24:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:17,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:17,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:17,021 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) [2024-11-18 14:24:17,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:24:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:17,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:24:17,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 14:24:17,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 14:24:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975961512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:17,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:17,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-18 14:24:17,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175431178] [2024-11-18 14:24:17,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:17,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:24:17,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:24:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:24:17,343 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:24:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:17,458 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-11-18 14:24:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:24:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-11-18 14:24:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:17,460 INFO L225 Difference]: With dead ends: 55 [2024-11-18 14:24:17,460 INFO L226 Difference]: Without dead ends: 31 [2024-11-18 14:24:17,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:24:17,463 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:17,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-18 14:24:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-18 14:24:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 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) [2024-11-18 14:24:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-18 14:24:17,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-11-18 14:24:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:17,469 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-18 14:24:17,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:24:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-18 14:24:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 14:24:17,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:17,476 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:17,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 14:24:17,676 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 [2024-11-18 14:24:17,677 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:17,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-11-18 14:24:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:17,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424215070] [2024-11-18 14:24:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 14:24:17,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:17,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424215070] [2024-11-18 14:24:17,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424215070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:17,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462330876] [2024-11-18 14:24:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:17,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:17,804 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) [2024-11-18 14:24:17,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:24:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:17,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:24:17,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 14:24:17,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 14:24:18,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462330876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:18,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:18,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-18 14:24:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214330526] [2024-11-18 14:24:18,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:18,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-18 14:24:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-18 14:24:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-18 14:24:18,031 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 14:24:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:18,130 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-18 14:24:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:24:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-11-18 14:24:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:18,132 INFO L225 Difference]: With dead ends: 40 [2024-11-18 14:24:18,132 INFO L226 Difference]: Without dead ends: 36 [2024-11-18 14:24:18,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:24:18,133 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:18,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-18 14:24:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-18 14:24:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-18 14:24:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-11-18 14:24:18,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-11-18 14:24:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:18,147 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-11-18 14:24:18,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 14:24:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-11-18 14:24:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-18 14:24:18,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:18,151 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:18,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:18,351 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 [2024-11-18 14:24:18,352 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:18,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-11-18 14:24:18,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:18,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239162079] [2024-11-18 14:24:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 14:24:18,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:18,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239162079] [2024-11-18 14:24:18,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239162079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:18,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484001718] [2024-11-18 14:24:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:18,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:18,483 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) [2024-11-18 14:24:18,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:24:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:18,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:24:18,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:24:18,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:24:18,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484001718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:18,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:18,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-18 14:24:18,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569985755] [2024-11-18 14:24:18,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:18,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 14:24:18,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:18,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 14:24:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:24:18,860 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-18 14:24:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:19,022 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-11-18 14:24:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:24:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-11-18 14:24:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:19,023 INFO L225 Difference]: With dead ends: 69 [2024-11-18 14:24:19,023 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 14:24:19,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:24:19,024 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:19,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 14:24:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-18 14:24:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-18 14:24:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-18 14:24:19,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-11-18 14:24:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:19,036 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-18 14:24:19,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-18 14:24:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-18 14:24:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 14:24:19,037 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:19,037 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:19,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:24:19,237 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 [2024-11-18 14:24:19,238 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:19,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-11-18 14:24:19,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:19,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932912987] [2024-11-18 14:24:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:19,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 14:24:19,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932912987] [2024-11-18 14:24:19,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932912987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:19,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057071139] [2024-11-18 14:24:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:19,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:19,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:19,374 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) [2024-11-18 14:24:19,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:24:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:19,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:24:19,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 14:24:19,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:24:19,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057071139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:19,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:19,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-18 14:24:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786443622] [2024-11-18 14:24:19,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:19,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 14:24:19,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:19,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 14:24:19,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:24:19,933 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-18 14:24:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:20,248 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-11-18 14:24:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-18 14:24:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2024-11-18 14:24:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:20,250 INFO L225 Difference]: With dead ends: 101 [2024-11-18 14:24:20,250 INFO L226 Difference]: Without dead ends: 68 [2024-11-18 14:24:20,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-18 14:24:20,252 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:20,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:24:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-18 14:24:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-11-18 14:24:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2024-11-18 14:24:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-11-18 14:24:20,273 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-11-18 14:24:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:20,273 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-11-18 14:24:20,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-18 14:24:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-11-18 14:24:20,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-18 14:24:20,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:20,277 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:20,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 14:24:20,478 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 [2024-11-18 14:24:20,478 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:20,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-11-18 14:24:20,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:20,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431920497] [2024-11-18 14:24:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:20,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-18 14:24:20,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:20,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431920497] [2024-11-18 14:24:20,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431920497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:20,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901680272] [2024-11-18 14:24:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:20,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:20,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:20,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:20,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:24:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:20,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 14:24:20,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 14:24:20,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 14:24:21,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901680272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:21,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:21,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-11-18 14:24:21,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178337613] [2024-11-18 14:24:21,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:21,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 14:24:21,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:21,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 14:24:21,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:24:21,149 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-18 14:24:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:21,320 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-11-18 14:24:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 14:24:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2024-11-18 14:24:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:21,322 INFO L225 Difference]: With dead ends: 102 [2024-11-18 14:24:21,322 INFO L226 Difference]: Without dead ends: 98 [2024-11-18 14:24:21,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:24:21,324 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:21,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-18 14:24:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-11-18 14:24:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-18 14:24:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-11-18 14:24:21,338 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-11-18 14:24:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:21,338 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-11-18 14:24:21,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-18 14:24:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-11-18 14:24:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 14:24:21,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:21,341 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:21,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 14:24:21,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:21,542 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:21,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1770426885, now seen corresponding path program 1 times [2024-11-18 14:24:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:21,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497267371] [2024-11-18 14:24:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:21,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-18 14:24:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497267371] [2024-11-18 14:24:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497267371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517801534] [2024-11-18 14:24:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:21,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:21,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:21,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:24:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:21,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 14:24:21,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-18 14:24:21,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-18 14:24:22,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517801534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:22,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:22,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-11-18 14:24:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233559104] [2024-11-18 14:24:22,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:22,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-18 14:24:22,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:22,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-18 14:24:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-18 14:24:22,594 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-18 14:24:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:23,060 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-11-18 14:24:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-18 14:24:23,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2024-11-18 14:24:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:23,063 INFO L225 Difference]: With dead ends: 177 [2024-11-18 14:24:23,063 INFO L226 Difference]: Without dead ends: 104 [2024-11-18 14:24:23,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 14:24:23,065 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:23,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:24:23,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-18 14:24:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-11-18 14:24:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2024-11-18 14:24:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-11-18 14:24:23,077 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2024-11-18 14:24:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:23,077 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-11-18 14:24:23,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-18 14:24:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-11-18 14:24:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-18 14:24:23,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:23,079 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:23,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 14:24:23,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:23,281 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:23,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:23,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1566869308, now seen corresponding path program 1 times [2024-11-18 14:24:23,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:23,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191285] [2024-11-18 14:24:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:23,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2024-11-18 14:24:23,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:23,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191285] [2024-11-18 14:24:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677248118] [2024-11-18 14:24:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:23,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:23,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:23,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:23,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:24:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:23,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 14:24:23,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-18 14:24:23,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 228 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-11-18 14:24:24,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677248118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:24,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:24,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-11-18 14:24:24,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696387955] [2024-11-18 14:24:24,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:24,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-18 14:24:24,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:24,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-18 14:24:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-18 14:24:24,675 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-18 14:24:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:24,898 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-11-18 14:24:24,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 14:24:24,899 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 146 [2024-11-18 14:24:24,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:24,900 INFO L225 Difference]: With dead ends: 132 [2024-11-18 14:24:24,901 INFO L226 Difference]: Without dead ends: 128 [2024-11-18 14:24:24,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-11-18 14:24:24,902 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:24,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 209 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-18 14:24:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-11-18 14:24:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2024-11-18 14:24:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-11-18 14:24:24,916 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2024-11-18 14:24:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:24,916 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-11-18 14:24:24,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-18 14:24:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-11-18 14:24:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-11-18 14:24:24,919 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:24,919 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 18, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:24,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:25,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:25,124 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:25,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-11-18 14:24:25,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:25,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515127324] [2024-11-18 14:24:25,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:25,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:25,156 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:25,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-11-18 14:24:25,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:25,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515127324] [2024-11-18 14:24:25,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515127324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:25,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107883526] [2024-11-18 14:24:25,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:25,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:25,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:25,477 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:25,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:24:25,598 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:25,599 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:25,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 14:24:25,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-11-18 14:24:25,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-11-18 14:24:27,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107883526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:27,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:27,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-11-18 14:24:27,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53777442] [2024-11-18 14:24:27,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:27,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-18 14:24:27,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:27,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-18 14:24:27,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-18 14:24:27,388 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-18 14:24:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:28,087 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-11-18 14:24:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-18 14:24:28,088 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) Word has length 284 [2024-11-18 14:24:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:28,090 INFO L225 Difference]: With dead ends: 323 [2024-11-18 14:24:28,091 INFO L226 Difference]: Without dead ends: 214 [2024-11-18 14:24:28,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-11-18 14:24:28,093 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 129 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:28,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:24:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-18 14:24:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-11-18 14:24:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 35 states have call successors, (35), 17 states have call predecessors, (35), 25 states have return successors, (120), 43 states have call predecessors, (120), 35 states have call successors, (120) [2024-11-18 14:24:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-11-18 14:24:28,112 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-11-18 14:24:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:28,112 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-11-18 14:24:28,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-18 14:24:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-11-18 14:24:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2024-11-18 14:24:28,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:28,116 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 20, 18, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:28,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 14:24:28,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-18 14:24:28,321 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:28,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1509408310, now seen corresponding path program 3 times [2024-11-18 14:24:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:28,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702466648] [2024-11-18 14:24:28,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:24:28,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:28,355 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 14:24:28,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 488 proven. 80 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2024-11-18 14:24:28,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702466648] [2024-11-18 14:24:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702466648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147908693] [2024-11-18 14:24:28,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:24:28,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:28,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:28,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:28,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:24:28,683 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 14:24:28,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:28,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 14:24:28,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 496 proven. 83 refuted. 0 times theorem prover too weak. 2608 trivial. 0 not checked. [2024-11-18 14:24:28,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 500 proven. 89 refuted. 0 times theorem prover too weak. 2598 trivial. 0 not checked. [2024-11-18 14:24:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147908693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:29,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2024-11-18 14:24:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081220610] [2024-11-18 14:24:29,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:29,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 14:24:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 14:24:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:24:29,945 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-18 14:24:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:30,097 INFO L93 Difference]: Finished difference Result 255 states and 465 transitions. [2024-11-18 14:24:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 14:24:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 336 [2024-11-18 14:24:30,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:30,100 INFO L225 Difference]: With dead ends: 255 [2024-11-18 14:24:30,100 INFO L226 Difference]: Without dead ends: 251 [2024-11-18 14:24:30,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 662 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:24:30,101 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:30,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-18 14:24:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 224. [2024-11-18 14:24:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 149 states have internal predecessors, (173), 45 states have call successors, (45), 20 states have call predecessors, (45), 30 states have return successors, (187), 54 states have call predecessors, (187), 45 states have call successors, (187) [2024-11-18 14:24:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 405 transitions. [2024-11-18 14:24:30,132 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 405 transitions. Word has length 336 [2024-11-18 14:24:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:30,133 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 405 transitions. [2024-11-18 14:24:30,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-18 14:24:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 405 transitions. [2024-11-18 14:24:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2024-11-18 14:24:30,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:30,141 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 30, 29, 29, 24, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:30,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-18 14:24:30,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:30,341 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:30,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:30,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1192940537, now seen corresponding path program 4 times [2024-11-18 14:24:30,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:30,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258728585] [2024-11-18 14:24:30,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:30,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:30,375 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:30,376 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 182 proven. 720 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2024-11-18 14:24:30,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:30,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258728585] [2024-11-18 14:24:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258728585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:30,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388711247] [2024-11-18 14:24:30,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:30,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:30,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:30,547 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:30,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:24:30,741 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:30,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:30,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:24:30,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 1267 proven. 6 refuted. 0 times theorem prover too weak. 5710 trivial. 0 not checked. [2024-11-18 14:24:30,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 188 proven. 860 refuted. 0 times theorem prover too weak. 5935 trivial. 0 not checked. [2024-11-18 14:24:32,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388711247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:32,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:32,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-18 14:24:32,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427763930] [2024-11-18 14:24:32,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:32,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 14:24:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 14:24:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:24:32,273 INFO L87 Difference]: Start difference. First operand 224 states and 405 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-18 14:24:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:32,393 INFO L93 Difference]: Finished difference Result 412 states and 767 transitions. [2024-11-18 14:24:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:24:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 484 [2024-11-18 14:24:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:32,396 INFO L225 Difference]: With dead ends: 412 [2024-11-18 14:24:32,396 INFO L226 Difference]: Without dead ends: 193 [2024-11-18 14:24:32,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 958 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-18 14:24:32,398 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:32,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-18 14:24:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2024-11-18 14:24:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.16) internal successors, (145), 124 states have internal predecessors, (145), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (112), 42 states have call predecessors, (112), 37 states have call successors, (112) [2024-11-18 14:24:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2024-11-18 14:24:32,414 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 484 [2024-11-18 14:24:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:32,414 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2024-11-18 14:24:32,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-18 14:24:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2024-11-18 14:24:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-11-18 14:24:32,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:32,418 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:32,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-18 14:24:32,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-18 14:24:32,621 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:32,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:32,621 INFO L85 PathProgramCache]: Analyzing trace with hash -240108639, now seen corresponding path program 5 times [2024-11-18 14:24:32,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:32,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529847940] [2024-11-18 14:24:32,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:24:32,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:32,642 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-18 14:24:32,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-11-18 14:24:32,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:32,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529847940] [2024-11-18 14:24:32,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529847940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:32,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058793268] [2024-11-18 14:24:32,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:24:32,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:32,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:32,733 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:32,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 14:24:32,822 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-18 14:24:32,822 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:32,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-18 14:24:32,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 1045 proven. 13 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2024-11-18 14:24:32,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-11-18 14:24:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058793268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:33,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:33,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-11-18 14:24:33,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518970606] [2024-11-18 14:24:33,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:33,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 14:24:33,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:33,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 14:24:33,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:24:33,859 INFO L87 Difference]: Start difference. First operand 186 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-18 14:24:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:33,975 INFO L93 Difference]: Finished difference Result 345 states and 585 transitions. [2024-11-18 14:24:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:24:33,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 351 [2024-11-18 14:24:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:33,977 INFO L225 Difference]: With dead ends: 345 [2024-11-18 14:24:33,977 INFO L226 Difference]: Without dead ends: 147 [2024-11-18 14:24:33,978 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 692 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-18 14:24:33,979 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:33,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 163 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-18 14:24:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-18 14:24:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 27 states have call successors, (27), 17 states have call predecessors, (27), 18 states have return successors, (77), 29 states have call predecessors, (77), 27 states have call successors, (77) [2024-11-18 14:24:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2024-11-18 14:24:33,989 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 351 [2024-11-18 14:24:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:33,989 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2024-11-18 14:24:33,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-18 14:24:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2024-11-18 14:24:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2024-11-18 14:24:33,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:33,991 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 25, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:34,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:34,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-18 14:24:34,195 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:34,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash 5991049, now seen corresponding path program 6 times [2024-11-18 14:24:34,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:34,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141246853] [2024-11-18 14:24:34,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:24:34,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:34,250 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-18 14:24:34,251 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 785 proven. 94 refuted. 0 times theorem prover too weak. 3800 trivial. 0 not checked. [2024-11-18 14:24:34,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141246853] [2024-11-18 14:24:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141246853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12022485] [2024-11-18 14:24:34,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:24:34,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:34,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:34,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:34,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 14:24:34,738 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-18 14:24:34,738 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:34,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 14:24:34,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 253 proven. 611 refuted. 0 times theorem prover too weak. 3815 trivial. 0 not checked. [2024-11-18 14:24:34,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 255 proven. 625 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2024-11-18 14:24:36,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12022485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:36,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:36,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 28 [2024-11-18 14:24:36,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531285002] [2024-11-18 14:24:36,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:36,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 14:24:36,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 14:24:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-11-18 14:24:36,403 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-18 14:24:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:37,036 INFO L93 Difference]: Finished difference Result 423 states and 742 transitions. [2024-11-18 14:24:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-18 14:24:37,037 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) Word has length 405 [2024-11-18 14:24:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:37,039 INFO L225 Difference]: With dead ends: 423 [2024-11-18 14:24:37,039 INFO L226 Difference]: Without dead ends: 278 [2024-11-18 14:24:37,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 791 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=2397, Unknown=0, NotChecked=0, Total=2862 [2024-11-18 14:24:37,041 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 131 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:37,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 384 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:24:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-18 14:24:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 199. [2024-11-18 14:24:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 134 states have internal predecessors, (161), 41 states have call successors, (41), 24 states have call predecessors, (41), 21 states have return successors, (119), 40 states have call predecessors, (119), 41 states have call successors, (119) [2024-11-18 14:24:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 321 transitions. [2024-11-18 14:24:37,055 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 321 transitions. Word has length 405 [2024-11-18 14:24:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:37,056 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 321 transitions. [2024-11-18 14:24:37,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-18 14:24:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 321 transitions. [2024-11-18 14:24:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2024-11-18 14:24:37,058 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:37,058 INFO L215 NwaCegarLoop]: trace histogram [38, 38, 35, 35, 29, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:37,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:37,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-18 14:24:37,263 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:37,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash -744556606, now seen corresponding path program 7 times [2024-11-18 14:24:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860754661] [2024-11-18 14:24:37,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:24:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1248 refuted. 0 times theorem prover too weak. 5793 trivial. 0 not checked. [2024-11-18 14:24:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860754661] [2024-11-18 14:24:37,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860754661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538360967] [2024-11-18 14:24:37,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:24:37,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:37,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:37,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:37,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 14:24:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:38,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-18 14:24:38,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1248 refuted. 0 times theorem prover too weak. 5793 trivial. 0 not checked. [2024-11-18 14:24:38,122 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1281 refuted. 0 times theorem prover too weak. 5760 trivial. 0 not checked. [2024-11-18 14:24:40,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538360967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:40,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:40,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2024-11-18 14:24:40,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169416778] [2024-11-18 14:24:40,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:40,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 14:24:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:40,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 14:24:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:24:40,531 INFO L87 Difference]: Start difference. First operand 199 states and 321 transitions. Second operand has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-18 14:24:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:40,713 INFO L93 Difference]: Finished difference Result 228 states and 388 transitions. [2024-11-18 14:24:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 14:24:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 500 [2024-11-18 14:24:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:40,718 INFO L225 Difference]: With dead ends: 228 [2024-11-18 14:24:40,718 INFO L226 Difference]: Without dead ends: 222 [2024-11-18 14:24:40,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 989 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2024-11-18 14:24:40,720 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:40,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 187 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-18 14:24:40,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2024-11-18 14:24:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 145 states have (on average 1.1724137931034482) internal successors, (170), 143 states have internal predecessors, (170), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (150), 46 states have call predecessors, (150), 44 states have call successors, (150) [2024-11-18 14:24:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 364 transitions. [2024-11-18 14:24:40,736 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 364 transitions. Word has length 500 [2024-11-18 14:24:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:40,737 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 364 transitions. [2024-11-18 14:24:40,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-18 14:24:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 364 transitions. [2024-11-18 14:24:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2024-11-18 14:24:40,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:40,740 INFO L215 NwaCegarLoop]: trace histogram [44, 44, 37, 37, 33, 33, 22, 22, 22, 22, 22, 22, 22, 18, 18, 18, 18, 18, 18, 18, 15, 11, 11, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:40,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:40,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-18 14:24:40,945 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:40,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:40,945 INFO L85 PathProgramCache]: Analyzing trace with hash 399277922, now seen corresponding path program 8 times [2024-11-18 14:24:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:40,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29097634] [2024-11-18 14:24:40,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:41,032 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:41,032 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 359 proven. 1056 refuted. 0 times theorem prover too weak. 7625 trivial. 0 not checked. [2024-11-18 14:24:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29097634] [2024-11-18 14:24:41,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29097634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464457876] [2024-11-18 14:24:41,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:41,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:41,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:41,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:41,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-18 14:24:41,693 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:41,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:41,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-18 14:24:41,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 243 proven. 1553 refuted. 0 times theorem prover too weak. 7244 trivial. 0 not checked. [2024-11-18 14:24:41,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 243 proven. 1597 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2024-11-18 14:24:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464457876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:45,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:45,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-11-18 14:24:45,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743273850] [2024-11-18 14:24:45,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:45,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 14:24:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 14:24:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-11-18 14:24:45,003 INFO L87 Difference]: Start difference. First operand 214 states and 364 transitions. Second operand has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-11-18 14:24:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:45,245 INFO L93 Difference]: Finished difference Result 256 states and 481 transitions. [2024-11-18 14:24:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-18 14:24:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) Word has length 556 [2024-11-18 14:24:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:45,251 INFO L225 Difference]: With dead ends: 256 [2024-11-18 14:24:45,254 INFO L226 Difference]: Without dead ends: 248 [2024-11-18 14:24:45,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 1092 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 14:24:45,256 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:45,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 241 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-18 14:24:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 220. [2024-11-18 14:24:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 149 states have (on average 1.167785234899329) internal successors, (174), 147 states have internal predecessors, (174), 44 states have call successors, (44), 24 states have call predecessors, (44), 26 states have return successors, (153), 48 states have call predecessors, (153), 44 states have call successors, (153) [2024-11-18 14:24:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 371 transitions. [2024-11-18 14:24:45,271 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 371 transitions. Word has length 556 [2024-11-18 14:24:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:45,272 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 371 transitions. [2024-11-18 14:24:45,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-11-18 14:24:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 371 transitions. [2024-11-18 14:24:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1566 [2024-11-18 14:24:45,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:45,283 INFO L215 NwaCegarLoop]: trace histogram [128, 128, 101, 101, 95, 92, 64, 64, 64, 64, 64, 64, 64, 50, 50, 50, 50, 50, 50, 50, 42, 36, 31, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:45,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-18 14:24:45,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:45,487 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:45,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:45,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1274023156, now seen corresponding path program 9 times [2024-11-18 14:24:45,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:45,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325767976] [2024-11-18 14:24:45,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:24:45,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:45,519 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:24:45,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 2854 proven. 23 refuted. 0 times theorem prover too weak. 71450 trivial. 0 not checked. [2024-11-18 14:24:45,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:45,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325767976] [2024-11-18 14:24:45,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325767976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:45,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782964689] [2024-11-18 14:24:45,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:24:45,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:45,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:45,583 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:45,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-18 14:24:45,822 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:24:45,822 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:45,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:24:45,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 5120 proven. 7 refuted. 0 times theorem prover too weak. 69200 trivial. 0 not checked. [2024-11-18 14:24:45,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 3310 proven. 33 refuted. 0 times theorem prover too weak. 70984 trivial. 0 not checked. [2024-11-18 14:24:49,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782964689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:49,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:49,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 17 [2024-11-18 14:24:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510721844] [2024-11-18 14:24:49,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:49,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 14:24:49,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 14:24:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:24:49,549 INFO L87 Difference]: Start difference. First operand 220 states and 371 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-18 14:24:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:49,692 INFO L93 Difference]: Finished difference Result 435 states and 841 transitions. [2024-11-18 14:24:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 14:24:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) Word has length 1565 [2024-11-18 14:24:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:49,695 INFO L225 Difference]: With dead ends: 435 [2024-11-18 14:24:49,695 INFO L226 Difference]: Without dead ends: 221 [2024-11-18 14:24:49,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3143 GetRequests, 3118 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-11-18 14:24:49,698 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:49,699 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 135 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-18 14:24:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2024-11-18 14:24:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 142 states have internal predecessors, (168), 42 states have call successors, (42), 24 states have call predecessors, (42), 25 states have return successors, (148), 46 states have call predecessors, (148), 42 states have call successors, (148) [2024-11-18 14:24:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 358 transitions. [2024-11-18 14:24:49,713 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 358 transitions. Word has length 1565 [2024-11-18 14:24:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:49,715 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 358 transitions. [2024-11-18 14:24:49,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-18 14:24:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 358 transitions. [2024-11-18 14:24:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2024-11-18 14:24:49,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:49,724 INFO L215 NwaCegarLoop]: trace histogram [104, 104, 97, 97, 81, 80, 52, 52, 52, 52, 52, 52, 52, 48, 48, 48, 48, 48, 48, 48, 32, 29, 24, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:49,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:49,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-18 14:24:49,928 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:49,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1191776500, now seen corresponding path program 10 times [2024-11-18 14:24:49,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:49,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927444910] [2024-11-18 14:24:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:49,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:50,074 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:50,075 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 817 proven. 3789 refuted. 0 times theorem prover too weak. 51658 trivial. 0 not checked. [2024-11-18 14:24:51,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:51,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927444910] [2024-11-18 14:24:51,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927444910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:51,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179161097] [2024-11-18 14:24:51,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:51,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:51,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:51,396 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:51,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-18 14:24:51,843 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:51,843 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:51,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 14:24:51,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 8034 proven. 68 refuted. 0 times theorem prover too weak. 48162 trivial. 0 not checked. [2024-11-18 14:24:51,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 820 proven. 4160 refuted. 0 times theorem prover too weak. 51284 trivial. 0 not checked. [2024-11-18 14:24:55,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179161097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:55,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:55,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2024-11-18 14:24:55,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563199405] [2024-11-18 14:24:55,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:55,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 14:24:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 14:24:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:24:55,523 INFO L87 Difference]: Start difference. First operand 213 states and 358 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-18 14:24:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:55,760 INFO L93 Difference]: Finished difference Result 425 states and 825 transitions. [2024-11-18 14:24:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 14:24:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) Word has length 1371 [2024-11-18 14:24:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:55,763 INFO L225 Difference]: With dead ends: 425 [2024-11-18 14:24:55,763 INFO L226 Difference]: Without dead ends: 218 [2024-11-18 14:24:55,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 2728 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 14:24:55,765 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:55,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 306 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-18 14:24:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-11-18 14:24:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 145 states have internal predecessors, (170), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (138), 46 states have call predecessors, (138), 42 states have call successors, (138) [2024-11-18 14:24:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 350 transitions. [2024-11-18 14:24:55,779 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 350 transitions. Word has length 1371 [2024-11-18 14:24:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:55,779 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 350 transitions. [2024-11-18 14:24:55,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-18 14:24:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 350 transitions. [2024-11-18 14:24:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1415 [2024-11-18 14:24:55,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:55,789 INFO L215 NwaCegarLoop]: trace histogram [105, 105, 102, 102, 85, 83, 52, 52, 52, 52, 52, 52, 52, 51, 51, 51, 51, 51, 51, 51, 34, 31, 20, 19, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:55,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-18 14:24:55,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-18 14:24:55,994 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:55,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash 499936055, now seen corresponding path program 11 times [2024-11-18 14:24:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:55,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651090177] [2024-11-18 14:24:55,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:24:55,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:56,038 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-18 14:24:56,038 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 1404 proven. 4050 refuted. 0 times theorem prover too weak. 54367 trivial. 0 not checked. [2024-11-18 14:24:56,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651090177] [2024-11-18 14:24:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651090177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294744448] [2024-11-18 14:24:56,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:24:56,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:56,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:56,351 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:56,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-18 14:24:56,621 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-18 14:24:56,621 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:56,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-18 14:24:56,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 22144 proven. 176 refuted. 0 times theorem prover too weak. 37501 trivial. 0 not checked. [2024-11-18 14:24:56,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:25:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 1441 proven. 4381 refuted. 0 times theorem prover too weak. 53999 trivial. 0 not checked. [2024-11-18 14:25:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294744448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:25:01,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:25:01,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 19] total 27 [2024-11-18 14:25:01,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611322552] [2024-11-18 14:25:01,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:25:01,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-18 14:25:01,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-18 14:25:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-11-18 14:25:01,133 INFO L87 Difference]: Start difference. First operand 218 states and 350 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) [2024-11-18 14:25:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:01,560 INFO L93 Difference]: Finished difference Result 444 states and 812 transitions. [2024-11-18 14:25:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-18 14:25:01,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) Word has length 1414 [2024-11-18 14:25:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:01,563 INFO L225 Difference]: With dead ends: 444 [2024-11-18 14:25:01,563 INFO L226 Difference]: Without dead ends: 220 [2024-11-18 14:25:01,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2861 GetRequests, 2811 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2024-11-18 14:25:01,565 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:01,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 454 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:25:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-18 14:25:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2024-11-18 14:25:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 144 states have internal predecessors, (166), 41 states have call successors, (41), 27 states have call predecessors, (41), 24 states have return successors, (123), 42 states have call predecessors, (123), 41 states have call successors, (123) [2024-11-18 14:25:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 330 transitions. [2024-11-18 14:25:01,578 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 330 transitions. Word has length 1414 [2024-11-18 14:25:01,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:01,579 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 330 transitions. [2024-11-18 14:25:01,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) [2024-11-18 14:25:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 330 transitions. [2024-11-18 14:25:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1727 [2024-11-18 14:25:01,591 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:01,591 INFO L215 NwaCegarLoop]: trace histogram [128, 128, 125, 125, 102, 102, 64, 64, 64, 64, 64, 64, 64, 62, 62, 62, 62, 62, 62, 62, 40, 38, 26, 23, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:01,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-18 14:25:01,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:01,792 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:01,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:01,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1312168192, now seen corresponding path program 12 times [2024-11-18 14:25:01,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:01,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444640526] [2024-11-18 14:25:01,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:25:01,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:01,977 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-18 14:25:01,978 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 89442 backedges. 1453 proven. 6025 refuted. 0 times theorem prover too weak. 81964 trivial. 0 not checked. [2024-11-18 14:25:02,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:02,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444640526] [2024-11-18 14:25:02,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444640526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:25:02,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772156889] [2024-11-18 14:25:02,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:25:02,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:02,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:02,488 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:25:02,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-18 14:25:02,852 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-18 14:25:02,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:02,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-18 14:25:02,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:25:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 89442 backedges. 1453 proven. 6025 refuted. 0 times theorem prover too weak. 81964 trivial. 0 not checked. [2024-11-18 14:25:02,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:25:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 89442 backedges. 1459 proven. 6089 refuted. 0 times theorem prover too weak. 81894 trivial. 0 not checked. [2024-11-18 14:25:10,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772156889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:25:10,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:25:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 25] total 28 [2024-11-18 14:25:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740665183] [2024-11-18 14:25:10,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:25:10,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 14:25:10,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 14:25:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2024-11-18 14:25:10,755 INFO L87 Difference]: Start difference. First operand 214 states and 330 transitions. Second operand has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 28 states have internal predecessors, (94), 24 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 14 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-18 14:25:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:11,046 INFO L93 Difference]: Finished difference Result 253 states and 459 transitions. [2024-11-18 14:25:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 14:25:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 28 states have internal predecessors, (94), 24 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 14 states have call predecessors, (37), 24 states have call successors, (37) Word has length 1726 [2024-11-18 14:25:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:11,050 INFO L225 Difference]: With dead ends: 253 [2024-11-18 14:25:11,050 INFO L226 Difference]: Without dead ends: 245 [2024-11-18 14:25:11,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3485 GetRequests, 3438 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 14:25:11,051 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:11,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 249 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:25:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-18 14:25:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 216. [2024-11-18 14:25:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 145 states have internal predecessors, (167), 42 states have call successors, (42), 27 states have call predecessors, (42), 24 states have return successors, (130), 43 states have call predecessors, (130), 42 states have call successors, (130) [2024-11-18 14:25:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 339 transitions. [2024-11-18 14:25:11,069 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 339 transitions. Word has length 1726 [2024-11-18 14:25:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:11,070 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 339 transitions. [2024-11-18 14:25:11,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 28 states have internal predecessors, (94), 24 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 14 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-18 14:25:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 339 transitions. [2024-11-18 14:25:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3239 [2024-11-18 14:25:11,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:11,108 INFO L215 NwaCegarLoop]: trace histogram [242, 242, 233, 233, 193, 191, 121, 121, 121, 121, 121, 121, 121, 116, 116, 116, 116, 116, 116, 116, 77, 70, 49, 42, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:11,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-18 14:25:11,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:11,312 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:11,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1920000623, now seen corresponding path program 13 times [2024-11-18 14:25:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:11,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825233251] [2024-11-18 14:25:11,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:25:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:25:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 317149 backedges. 6862 proven. 10437 refuted. 0 times theorem prover too weak. 299850 trivial. 0 not checked. [2024-11-18 14:25:17,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:17,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825233251] [2024-11-18 14:25:17,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825233251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:25:17,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918073180] [2024-11-18 14:25:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:25:17,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:17,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:17,637 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:25:17,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-18 14:25:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:25:18,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 7209 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-18 14:25:18,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:25:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 317149 backedges. 2058 proven. 14908 refuted. 0 times theorem prover too weak. 300183 trivial. 0 not checked. [2024-11-18 14:25:19,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:25:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 317149 backedges. 2058 proven. 15010 refuted. 0 times theorem prover too weak. 300081 trivial. 0 not checked. [2024-11-18 14:25:33,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918073180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:25:33,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:25:33,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 29] total 48 [2024-11-18 14:25:33,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044207028] [2024-11-18 14:25:33,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:25:33,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-18 14:25:33,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-18 14:25:33,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2010, Unknown=0, NotChecked=0, Total=2256 [2024-11-18 14:25:33,588 INFO L87 Difference]: Start difference. First operand 216 states and 339 transitions. Second operand has 48 states, 46 states have (on average 3.3043478260869565) internal successors, (152), 48 states have internal predecessors, (152), 41 states have call successors, (49), 1 states have call predecessors, (49), 25 states have return successors, (69), 29 states have call predecessors, (69), 41 states have call successors, (69) [2024-11-18 14:25:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:35,818 INFO L93 Difference]: Finished difference Result 653 states and 1578 transitions. [2024-11-18 14:25:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-18 14:25:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 3.3043478260869565) internal successors, (152), 48 states have internal predecessors, (152), 41 states have call successors, (49), 1 states have call predecessors, (49), 25 states have return successors, (69), 29 states have call predecessors, (69), 41 states have call successors, (69) Word has length 3238 [2024-11-18 14:25:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:35,824 INFO L225 Difference]: With dead ends: 653 [2024-11-18 14:25:35,825 INFO L226 Difference]: Without dead ends: 404 [2024-11-18 14:25:35,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6579 GetRequests, 6444 SyntacticMatches, 13 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4642 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1924, Invalid=13328, Unknown=0, NotChecked=0, Total=15252 [2024-11-18 14:25:35,833 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 277 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:35,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 957 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-18 14:25:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-18 14:25:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 300. [2024-11-18 14:25:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 210 states have (on average 1.0857142857142856) internal successors, (228), 206 states have internal predecessors, (228), 61 states have call successors, (61), 44 states have call predecessors, (61), 28 states have return successors, (219), 49 states have call predecessors, (219), 61 states have call successors, (219) [2024-11-18 14:25:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 508 transitions. [2024-11-18 14:25:35,860 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 508 transitions. Word has length 3238 [2024-11-18 14:25:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:35,861 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 508 transitions. [2024-11-18 14:25:35,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 3.3043478260869565) internal successors, (152), 48 states have internal predecessors, (152), 41 states have call successors, (49), 1 states have call predecessors, (49), 25 states have return successors, (69), 29 states have call predecessors, (69), 41 states have call successors, (69) [2024-11-18 14:25:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 508 transitions. [2024-11-18 14:25:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6548 [2024-11-18 14:25:36,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:36,080 INFO L215 NwaCegarLoop]: trace histogram [492, 492, 469, 469, 395, 382, 246, 246, 246, 246, 246, 246, 246, 234, 234, 234, 234, 234, 234, 234, 161, 136, 97, 87, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:36,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-18 14:25:36,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:36,285 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:36,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1134804984, now seen corresponding path program 14 times [2024-11-18 14:25:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:36,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083798455] [2024-11-18 14:25:36,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:25:36,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:39,124 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:25:39,125 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat