./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann04.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:54:58,007 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:54:58,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:54:58,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:54:58,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:54:58,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:54:58,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:54:58,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:54:58,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:54:58,080 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:54:58,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:54:58,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:54:58,081 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:54:58,081 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:54:58,081 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:54:58,081 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:54:58,081 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:54:58,082 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:54:58,082 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:54:58,082 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:54:58,082 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:54:58,082 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:54:58,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:54:58,082 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:54:58,082 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:54:58,083 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:54:58,083 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:54:58,083 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:54:58,083 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:54:58,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:54:58,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:54:58,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:54:58,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:54:58,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:54:58,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:54:58,084 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:54:58,084 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:54:58,084 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:54:58,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:54:58,084 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:54:58,084 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:54:58,084 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:54:58,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:54:58,085 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2025-02-05 15:54:58,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:54:58,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:54:58,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:54:58,374 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:54:58,374 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:54:58,374 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2025-02-05 15:54:59,660 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5fe45be6b/8a0af5d4d4e544628e0cacf957031b83/FLAGd3c8a2f9d [2025-02-05 15:54:59,873 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:54:59,874 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2025-02-05 15:54:59,879 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5fe45be6b/8a0af5d4d4e544628e0cacf957031b83/FLAGd3c8a2f9d [2025-02-05 15:54:59,898 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5fe45be6b/8a0af5d4d4e544628e0cacf957031b83 [2025-02-05 15:54:59,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:54:59,901 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:54:59,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:54:59,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:54:59,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:54:59,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:54:59" (1/1) ... [2025-02-05 15:54:59,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a8cc25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:54:59, skipping insertion in model container [2025-02-05 15:54:59,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:54:59" (1/1) ... [2025-02-05 15:54:59,917 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:55:00,024 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2025-02-05 15:55:00,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:55:00,034 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:55:00,043 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2025-02-05 15:55:00,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:55:00,058 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:55:00,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00 WrapperNode [2025-02-05 15:55:00,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:55:00,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:55:00,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:55:00,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:55:00,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,073 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,091 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2025-02-05 15:55:00,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:55:00,092 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:55:00,092 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:55:00,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:55:00,099 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,100 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,112 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]. [2025-02-05 15:55:00,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,114 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,119 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,119 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,120 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:55:00,120 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:55:00,120 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:55:00,120 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:55:00,121 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (1/1) ... [2025-02-05 15:55:00,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:55:00,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:00,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:55:00,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:55:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:55:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:55:00,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:55:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2025-02-05 15:55:00,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2025-02-05 15:55:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:55:00,210 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:55:00,211 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:55:00,315 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L23: havoc #t~ret5;havoc #t~ret6; [2025-02-05 15:55:00,315 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L21: havoc #t~ret4; [2025-02-05 15:55:00,328 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-02-05 15:55:00,329 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:55:00,338 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:55:00,339 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:55:00,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:55:00 BoogieIcfgContainer [2025-02-05 15:55:00,339 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:55:00,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:55:00,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:55:00,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:55:00,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:54:59" (1/3) ... [2025-02-05 15:55:00,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44cf6141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:55:00, skipping insertion in model container [2025-02-05 15:55:00,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:00" (2/3) ... [2025-02-05 15:55:00,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44cf6141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:55:00, skipping insertion in model container [2025-02-05 15:55:00,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:55:00" (3/3) ... [2025-02-05 15:55:00,347 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2025-02-05 15:55:00,358 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:55:00,360 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann04.c that has 2 procedures, 23 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 15:55:00,400 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:55:00,410 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;@35460934, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:55:00,411 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:55:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 15:55:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 15:55:00,418 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:00,419 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:00,419 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:00,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:00,423 INFO L85 PathProgramCache]: Analyzing trace with hash -640999361, now seen corresponding path program 1 times [2025-02-05 15:55:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:00,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157911186] [2025-02-05 15:55:00,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:00,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:00,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 15:55:00,504 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 15:55:00,505 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:00,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:55:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:00,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157911186] [2025-02-05 15:55:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157911186] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:55:00,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:55:00,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:55:00,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084077107] [2025-02-05 15:55:00,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:55:00,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:55:00,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:00,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:55:00,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:55:00,647 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:55:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:00,765 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2025-02-05 15:55:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:55:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-02-05 15:55:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:00,771 INFO L225 Difference]: With dead ends: 37 [2025-02-05 15:55:00,771 INFO L226 Difference]: Without dead ends: 27 [2025-02-05 15:55:00,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:55:00,775 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:00,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:00,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-05 15:55:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2025-02-05 15:55:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-02-05 15:55:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2025-02-05 15:55:00,805 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 12 [2025-02-05 15:55:00,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:00,805 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2025-02-05 15:55:00,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:55:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2025-02-05 15:55:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 15:55:00,807 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:00,807 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:00,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:55:00,807 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:00,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1861650847, now seen corresponding path program 1 times [2025-02-05 15:55:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:00,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767472806] [2025-02-05 15:55:00,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:00,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 15:55:00,821 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 15:55:00,821 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:00,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:55:00,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:00,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767472806] [2025-02-05 15:55:00,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767472806] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:00,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29627205] [2025-02-05 15:55:00,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:00,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:00,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:00,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:55:00,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 15:55:00,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 15:55:00,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:00,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:00,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 15:55:00,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:55:00,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:55:01,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29627205] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:01,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:01,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-05 15:55:01,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465974341] [2025-02-05 15:55:01,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:01,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 15:55:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:01,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 15:55:01,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:55:01,069 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-05 15:55:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:01,172 INFO L93 Difference]: Finished difference Result 69 states and 124 transitions. [2025-02-05 15:55:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:55:01,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2025-02-05 15:55:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:01,174 INFO L225 Difference]: With dead ends: 69 [2025-02-05 15:55:01,174 INFO L226 Difference]: Without dead ends: 45 [2025-02-05 15:55:01,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:55:01,175 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:01,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 66 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-05 15:55:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2025-02-05 15:55:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) [2025-02-05 15:55:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2025-02-05 15:55:01,189 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 19 [2025-02-05 15:55:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:01,190 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2025-02-05 15:55:01,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-05 15:55:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2025-02-05 15:55:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-05 15:55:01,194 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:01,194 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:01,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:55:01,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:01,396 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:01,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1457087151, now seen corresponding path program 1 times [2025-02-05 15:55:01,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:01,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351216963] [2025-02-05 15:55:01,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:01,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:01,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-05 15:55:01,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-05 15:55:01,439 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:01,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-02-05 15:55:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351216963] [2025-02-05 15:55:01,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351216963] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624573075] [2025-02-05 15:55:01,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:01,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:01,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:01,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:01,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:55:01,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-05 15:55:01,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-05 15:55:01,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:01,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:01,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:55:01,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-02-05 15:55:01,775 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-05 15:55:02,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624573075] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:02,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:02,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2025-02-05 15:55:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818704033] [2025-02-05 15:55:02,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:02,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 15:55:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:02,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 15:55:02,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:55:02,207 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-05 15:55:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:02,310 INFO L93 Difference]: Finished difference Result 62 states and 124 transitions. [2025-02-05 15:55:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:55:02,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2025-02-05 15:55:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:02,311 INFO L225 Difference]: With dead ends: 62 [2025-02-05 15:55:02,311 INFO L226 Difference]: Without dead ends: 58 [2025-02-05 15:55:02,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:55:02,312 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:02,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 68 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-05 15:55:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2025-02-05 15:55:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (60), 15 states have call predecessors, (60), 10 states have call successors, (60) [2025-02-05 15:55:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2025-02-05 15:55:02,326 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 45 [2025-02-05 15:55:02,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:02,326 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2025-02-05 15:55:02,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-05 15:55:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2025-02-05 15:55:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2025-02-05 15:55:02,329 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:02,330 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:02,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 15:55:02,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:02,531 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:02,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1906797306, now seen corresponding path program 2 times [2025-02-05 15:55:02,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:02,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754521580] [2025-02-05 15:55:02,532 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:55:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:02,562 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 119 statements into 2 equivalence classes. [2025-02-05 15:55:02,597 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 119 of 119 statements. [2025-02-05 15:55:02,597 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:55:02,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 124 proven. 289 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2025-02-05 15:55:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754521580] [2025-02-05 15:55:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754521580] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006063620] [2025-02-05 15:55:02,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:55:02,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:02,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:02,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:02,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:55:02,947 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 119 statements into 2 equivalence classes. [2025-02-05 15:55:02,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 119 of 119 statements. [2025-02-05 15:55:02,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:55:02,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:02,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 15:55:02,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-02-05 15:55:03,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2025-02-05 15:55:04,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006063620] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:04,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:04,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 33 [2025-02-05 15:55:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848334757] [2025-02-05 15:55:04,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:04,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-05 15:55:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:04,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-05 15:55:04,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 15:55:04,537 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 27 states have internal predecessors, (80), 12 states have call successors, (20), 2 states have call predecessors, (20), 16 states have return successors, (32), 18 states have call predecessors, (32), 12 states have call successors, (32) [2025-02-05 15:55:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:05,368 INFO L93 Difference]: Finished difference Result 144 states and 411 transitions. [2025-02-05 15:55:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-05 15:55:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 27 states have internal predecessors, (80), 12 states have call successors, (20), 2 states have call predecessors, (20), 16 states have return successors, (32), 18 states have call predecessors, (32), 12 states have call successors, (32) Word has length 119 [2025-02-05 15:55:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:05,373 INFO L225 Difference]: With dead ends: 144 [2025-02-05 15:55:05,374 INFO L226 Difference]: Without dead ends: 82 [2025-02-05 15:55:05,380 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2025-02-05 15:55:05,381 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:05,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 224 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 15:55:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-05 15:55:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2025-02-05 15:55:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 55 states have internal predecessors, (60), 15 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (68), 16 states have call predecessors, (68), 15 states have call successors, (68) [2025-02-05 15:55:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 143 transitions. [2025-02-05 15:55:05,402 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 143 transitions. Word has length 119 [2025-02-05 15:55:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:05,403 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 143 transitions. [2025-02-05 15:55:05,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 27 states have internal predecessors, (80), 12 states have call successors, (20), 2 states have call predecessors, (20), 16 states have return successors, (32), 18 states have call predecessors, (32), 12 states have call successors, (32) [2025-02-05 15:55:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 143 transitions. [2025-02-05 15:55:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-02-05 15:55:05,409 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:05,409 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:05,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 15:55:05,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:05,610 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:05,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:05,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2014828494, now seen corresponding path program 3 times [2025-02-05 15:55:05,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:05,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410905783] [2025-02-05 15:55:05,611 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:55:05,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:05,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 13 equivalence classes. [2025-02-05 15:55:05,646 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 72 of 105 statements. [2025-02-05 15:55:05,649 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-05 15:55:05,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 192 proven. 78 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2025-02-05 15:55:06,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410905783] [2025-02-05 15:55:06,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410905783] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167794782] [2025-02-05 15:55:06,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:55:06,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:06,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:06,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:06,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:55:06,103 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 13 equivalence classes. [2025-02-05 15:55:06,128 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 72 of 105 statements. [2025-02-05 15:55:06,128 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-05 15:55:06,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:06,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 15:55:06,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 190 proven. 71 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2025-02-05 15:55:06,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 208 proven. 61 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2025-02-05 15:55:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167794782] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:07,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:07,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 15] total 30 [2025-02-05 15:55:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213218664] [2025-02-05 15:55:07,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:07,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 15:55:07,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:07,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 15:55:07,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2025-02-05 15:55:07,570 INFO L87 Difference]: Start difference. First operand 79 states and 143 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 14 states have return successors, (27), 15 states have call predecessors, (27), 12 states have call successors, (27) [2025-02-05 15:55:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:07,924 INFO L93 Difference]: Finished difference Result 187 states and 393 transitions. [2025-02-05 15:55:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 15:55:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 14 states have return successors, (27), 15 states have call predecessors, (27), 12 states have call successors, (27) Word has length 105 [2025-02-05 15:55:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:07,927 INFO L225 Difference]: With dead ends: 187 [2025-02-05 15:55:07,930 INFO L226 Difference]: Without dead ends: 102 [2025-02-05 15:55:07,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 193 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2025-02-05 15:55:07,933 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:07,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 178 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:55:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-02-05 15:55:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2025-02-05 15:55:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (46), 16 states have call predecessors, (46), 15 states have call successors, (46) [2025-02-05 15:55:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 126 transitions. [2025-02-05 15:55:07,955 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 126 transitions. Word has length 105 [2025-02-05 15:55:07,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:07,955 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 126 transitions. [2025-02-05 15:55:07,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 14 states have return successors, (27), 15 states have call predecessors, (27), 12 states have call successors, (27) [2025-02-05 15:55:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 126 transitions. [2025-02-05 15:55:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2025-02-05 15:55:07,960 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:07,960 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:07,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:55:08,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:08,160 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:08,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:08,161 INFO L85 PathProgramCache]: Analyzing trace with hash 284498204, now seen corresponding path program 4 times [2025-02-05 15:55:08,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:08,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777044970] [2025-02-05 15:55:08,161 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:55:08,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:08,174 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 131 statements into 2 equivalence classes. [2025-02-05 15:55:08,198 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 131 of 131 statements. [2025-02-05 15:55:08,198 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 15:55:08,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 141 proven. 304 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2025-02-05 15:55:08,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:08,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777044970] [2025-02-05 15:55:08,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777044970] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:08,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809400126] [2025-02-05 15:55:08,703 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:55:08,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:08,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:08,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:55:08,803 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 131 statements into 2 equivalence classes. [2025-02-05 15:55:08,852 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 131 of 131 statements. [2025-02-05 15:55:08,852 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 15:55:08,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:08,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-05 15:55:08,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2025-02-05 15:55:08,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2025-02-05 15:55:10,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809400126] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:10,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:10,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 17] total 20 [2025-02-05 15:55:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615940194] [2025-02-05 15:55:10,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:10,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:55:10,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:10,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:55:10,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:55:10,346 INFO L87 Difference]: Start difference. First operand 85 states and 126 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (17), 2 states have call predecessors, (17), 10 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-05 15:55:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:10,597 INFO L93 Difference]: Finished difference Result 176 states and 299 transitions. [2025-02-05 15:55:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 15:55:10,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (17), 2 states have call predecessors, (17), 10 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) Word has length 131 [2025-02-05 15:55:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:10,599 INFO L225 Difference]: With dead ends: 176 [2025-02-05 15:55:10,599 INFO L226 Difference]: Without dead ends: 100 [2025-02-05 15:55:10,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 251 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 15:55:10,600 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:10,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 177 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-02-05 15:55:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2025-02-05 15:55:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 68 states have internal predecessors, (74), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2025-02-05 15:55:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 151 transitions. [2025-02-05 15:55:10,610 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 151 transitions. Word has length 131 [2025-02-05 15:55:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:10,610 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 151 transitions. [2025-02-05 15:55:10,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (17), 2 states have call predecessors, (17), 10 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-05 15:55:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 151 transitions. [2025-02-05 15:55:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2025-02-05 15:55:10,611 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:10,611 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:10,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 15:55:10,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:10,815 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:10,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1579822898, now seen corresponding path program 5 times [2025-02-05 15:55:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:10,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502797245] [2025-02-05 15:55:10,815 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:55:10,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:10,831 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 157 statements into 15 equivalence classes. [2025-02-05 15:55:10,869 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 136 of 157 statements. [2025-02-05 15:55:10,869 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-05 15:55:10,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 424 proven. 295 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2025-02-05 15:55:11,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:11,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502797245] [2025-02-05 15:55:11,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502797245] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:11,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330886409] [2025-02-05 15:55:11,606 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:55:11,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:11,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:11,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:11,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:55:11,703 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 157 statements into 15 equivalence classes. [2025-02-05 15:55:11,755 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 136 of 157 statements. [2025-02-05 15:55:11,755 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-05 15:55:11,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:11,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-05 15:55:11,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2025-02-05 15:55:11,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2025-02-05 15:55:15,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330886409] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:15,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:15,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 27] total 34 [2025-02-05 15:55:15,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909365146] [2025-02-05 15:55:15,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:15,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-05 15:55:15,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:15,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-05 15:55:15,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2025-02-05 15:55:15,700 INFO L87 Difference]: Start difference. First operand 100 states and 151 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 28 states have internal predecessors, (74), 14 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (31), 17 states have call predecessors, (31), 14 states have call successors, (31) [2025-02-05 15:55:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:16,139 INFO L93 Difference]: Finished difference Result 206 states and 357 transitions. [2025-02-05 15:55:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-05 15:55:16,140 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 28 states have internal predecessors, (74), 14 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (31), 17 states have call predecessors, (31), 14 states have call successors, (31) Word has length 157 [2025-02-05 15:55:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:16,143 INFO L225 Difference]: With dead ends: 206 [2025-02-05 15:55:16,144 INFO L226 Difference]: Without dead ends: 115 [2025-02-05 15:55:16,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 298 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=614, Invalid=2692, Unknown=0, NotChecked=0, Total=3306 [2025-02-05 15:55:16,146 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:16,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 308 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:55:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-02-05 15:55:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2025-02-05 15:55:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 77 states have internal predecessors, (83), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2025-02-05 15:55:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 184 transitions. [2025-02-05 15:55:16,168 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 184 transitions. Word has length 157 [2025-02-05 15:55:16,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:16,168 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 184 transitions. [2025-02-05 15:55:16,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 28 states have internal predecessors, (74), 14 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (31), 17 states have call predecessors, (31), 14 states have call successors, (31) [2025-02-05 15:55:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 184 transitions. [2025-02-05 15:55:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-02-05 15:55:16,170 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:16,170 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:16,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 15:55:16,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 15:55:16,371 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:16,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:16,371 INFO L85 PathProgramCache]: Analyzing trace with hash -841014366, now seen corresponding path program 6 times [2025-02-05 15:55:16,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:16,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623916833] [2025-02-05 15:55:16,372 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:55:16,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:16,382 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 183 statements into 18 equivalence classes. [2025-02-05 15:55:16,448 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 183 of 183 statements. [2025-02-05 15:55:16,448 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-02-05 15:55:16,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 688 proven. 74 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2025-02-05 15:55:17,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623916833] [2025-02-05 15:55:17,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623916833] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353743441] [2025-02-05 15:55:17,028 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:55:17,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:17,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:17,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:17,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:55:17,138 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 183 statements into 18 equivalence classes. [2025-02-05 15:55:17,187 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 183 of 183 statements. [2025-02-05 15:55:17,187 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-02-05 15:55:17,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:17,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-05 15:55:17,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2025-02-05 15:55:17,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2025-02-05 15:55:22,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353743441] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:22,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:22,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 33] total 38 [2025-02-05 15:55:22,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671838730] [2025-02-05 15:55:22,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:22,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-05 15:55:22,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:22,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-05 15:55:22,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 15:55:22,992 INFO L87 Difference]: Start difference. First operand 115 states and 184 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2025-02-05 15:55:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:24,231 INFO L93 Difference]: Finished difference Result 192 states and 342 transitions. [2025-02-05 15:55:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-02-05 15:55:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) Word has length 183 [2025-02-05 15:55:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:24,233 INFO L225 Difference]: With dead ends: 192 [2025-02-05 15:55:24,233 INFO L226 Difference]: Without dead ends: 188 [2025-02-05 15:55:24,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 343 SyntacticMatches, 20 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2025-02-05 15:55:24,235 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:24,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 274 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 15:55:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2025-02-05 15:55:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2025-02-05 15:55:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.0769230769230769) internal successors, (98), 92 states have internal predecessors, (98), 22 states have call successors, (22), 9 states have call predecessors, (22), 24 states have return successors, (121), 36 states have call predecessors, (121), 22 states have call successors, (121) [2025-02-05 15:55:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 241 transitions. [2025-02-05 15:55:24,263 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 241 transitions. Word has length 183 [2025-02-05 15:55:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:24,264 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 241 transitions. [2025-02-05 15:55:24,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2025-02-05 15:55:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 241 transitions. [2025-02-05 15:55:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2025-02-05 15:55:24,267 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:24,267 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:24,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 15:55:24,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:24,471 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:24,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash -682904789, now seen corresponding path program 7 times [2025-02-05 15:55:24,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:24,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891760387] [2025-02-05 15:55:24,471 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:55:24,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:24,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 170 statements into 1 equivalence classes. [2025-02-05 15:55:24,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 170 of 170 statements. [2025-02-05 15:55:24,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:24,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 495 proven. 368 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2025-02-05 15:55:24,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:24,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891760387] [2025-02-05 15:55:24,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891760387] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:24,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263171658] [2025-02-05 15:55:24,889 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:55:24,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:24,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:24,891 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:24,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:55:25,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 170 statements into 1 equivalence classes. [2025-02-05 15:55:25,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 170 of 170 statements. [2025-02-05 15:55:25,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:25,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:25,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-05 15:55:25,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2025-02-05 15:55:25,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2025-02-05 15:55:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263171658] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:29,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:29,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 28] total 32 [2025-02-05 15:55:29,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750355001] [2025-02-05 15:55:29,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:29,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 15:55:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:29,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 15:55:29,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:55:29,063 INFO L87 Difference]: Start difference. First operand 138 states and 241 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2025-02-05 15:55:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:29,921 INFO L93 Difference]: Finished difference Result 282 states and 571 transitions. [2025-02-05 15:55:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-02-05 15:55:29,922 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) Word has length 170 [2025-02-05 15:55:29,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:29,923 INFO L225 Difference]: With dead ends: 282 [2025-02-05 15:55:29,923 INFO L226 Difference]: Without dead ends: 0 [2025-02-05 15:55:29,926 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 323 SyntacticMatches, 19 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=930, Invalid=3762, Unknown=0, NotChecked=0, Total=4692 [2025-02-05 15:55:29,928 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 112 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:29,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 216 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 15:55:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-05 15:55:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-05 15:55:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:55:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-05 15:55:29,929 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2025-02-05 15:55:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:29,929 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-05 15:55:29,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2025-02-05 15:55:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-05 15:55:29,930 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-05 15:55:29,932 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-05 15:55:29,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 15:55:30,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:30,139 INFO L422 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2025-02-05 15:55:30,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-05 15:55:33,152 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-05 15:55:33,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 03:55:33 BoogieIcfgContainer [2025-02-05 15:55:33,164 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-05 15:55:33,165 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-05 15:55:33,165 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-05 15:55:33,165 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-05 15:55:33,166 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:55:00" (3/4) ... [2025-02-05 15:55:33,168 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-05 15:55:33,176 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure ackermann [2025-02-05 15:55:33,183 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-02-05 15:55:33,183 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2025-02-05 15:55:33,184 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-05 15:55:33,184 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-05 15:55:33,240 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-05 15:55:33,241 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-05 15:55:33,241 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-05 15:55:33,242 INFO L158 Benchmark]: Toolchain (without parser) took 33340.58ms. Allocated memory was 167.8MB in the beginning and 830.5MB in the end (delta: 662.7MB). Free memory was 130.3MB in the beginning and 716.0MB in the end (delta: -585.7MB). Peak memory consumption was 71.9MB. Max. memory is 16.1GB. [2025-02-05 15:55:33,242 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 201.3MB. Free memory is still 126.9MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:55:33,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.67ms. Allocated memory is still 167.8MB. Free memory was 130.3MB in the beginning and 119.4MB in the end (delta: 10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 15:55:33,243 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.65ms. Allocated memory is still 167.8MB. Free memory was 119.4MB in the beginning and 118.4MB in the end (delta: 971.9kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:55:33,243 INFO L158 Benchmark]: Boogie Preprocessor took 27.95ms. Allocated memory is still 167.8MB. Free memory was 118.4MB in the beginning and 117.5MB in the end (delta: 952.8kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:55:33,243 INFO L158 Benchmark]: IcfgBuilder took 219.00ms. Allocated memory is still 167.8MB. Free memory was 117.5MB in the beginning and 106.3MB in the end (delta: 11.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-05 15:55:33,244 INFO L158 Benchmark]: TraceAbstraction took 32823.71ms. Allocated memory was 167.8MB in the beginning and 830.5MB in the end (delta: 662.7MB). Free memory was 105.8MB in the beginning and 720.0MB in the end (delta: -614.1MB). Peak memory consumption was 300.0MB. Max. memory is 16.1GB. [2025-02-05 15:55:33,244 INFO L158 Benchmark]: Witness Printer took 75.86ms. Allocated memory is still 830.5MB. Free memory was 720.0MB in the beginning and 716.0MB in the end (delta: 3.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:55:33,245 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 201.3MB. Free memory is still 126.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.67ms. Allocated memory is still 167.8MB. Free memory was 130.3MB in the beginning and 119.4MB in the end (delta: 10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.65ms. Allocated memory is still 167.8MB. Free memory was 119.4MB in the beginning and 118.4MB in the end (delta: 971.9kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 27.95ms. Allocated memory is still 167.8MB. Free memory was 118.4MB in the beginning and 117.5MB in the end (delta: 952.8kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 219.00ms. Allocated memory is still 167.8MB. Free memory was 117.5MB in the beginning and 106.3MB in the end (delta: 11.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 32823.71ms. Allocated memory was 167.8MB in the beginning and 830.5MB in the end (delta: 662.7MB). Free memory was 105.8MB in the beginning and 720.0MB in the end (delta: -614.1MB). Peak memory consumption was 300.0MB. Max. memory is 16.1GB. * Witness Printer took 75.86ms. Allocated memory is still 830.5MB. Free memory was 720.0MB in the beginning and 716.0MB in the end (delta: 3.9MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.7s, OverallIterations: 9, TraceHistogramMax: 27, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 539 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 508 mSDsluCounter, 1582 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1359 mSDsCounter, 648 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3644 IncrementalHoareTripleChecker+Invalid, 4292 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 648 mSolverCounterUnsat, 223 mSDtfsCounter, 3644 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2192 GetRequests, 1759 SyntacticMatches, 75 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5265 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=8, InterpolantAutomatonStates: 222, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 80 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 22.1s InterpolantComputationTime, 1870 NumberOfCodeBlocks, 1762 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 2774 ConstructedInterpolants, 0 QuantifiedInterpolants, 5436 SizeOfPredicates, 27 NumberOfNonLiveVariables, 2679 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 15880/19659 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-05 15:55:33,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE