./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d 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-simple/fibo_7-1.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 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 21:04:52,056 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:04:52,107 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:04:52,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:04:52,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:04:52,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:04:52,131 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:04:52,131 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:04:52,132 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:04:52,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:04:52,132 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:04:52,132 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:04:52,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:04:52,133 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:04:52,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:04:52,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:04:52,135 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:04:52,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:04:52,135 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:04:52,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:04:52,135 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:04:52,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:04:52,135 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:04:52,135 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:04:52,135 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 -> 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb [2025-02-07 21:04:52,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:04:52,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:04:52,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:04:52,392 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:04:52,393 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:04:52,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2025-02-07 21:04:53,609 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/50f5671ee/bcd8b4a49ec94685905432abcef8324e/FLAGaf5316d9f [2025-02-07 21:04:53,823 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:04:53,827 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2025-02-07 21:04:53,833 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/50f5671ee/bcd8b4a49ec94685905432abcef8324e/FLAGaf5316d9f [2025-02-07 21:04:54,190 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/50f5671ee/bcd8b4a49ec94685905432abcef8324e [2025-02-07 21:04:54,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:04:54,193 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:04:54,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:04:54,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:04:54,197 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:04:54,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150732d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54, skipping insertion in model container [2025-02-07 21:04:54,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,206 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:04:54,297 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-simple/fibo_7-1.c[741,754] [2025-02-07 21:04:54,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:04:54,312 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:04:54,322 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-simple/fibo_7-1.c[741,754] [2025-02-07 21:04:54,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:04:54,334 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:04:54,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54 WrapperNode [2025-02-07 21:04:54,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:04:54,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:04:54,336 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:04:54,336 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:04:54,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,357 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-02-07 21:04:54,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:04:54,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:04:54,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:04:54,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:04:54,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,366 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,377 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]. [2025-02-07 21:04:54,377 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,377 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,379 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,381 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,381 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:04:54,383 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:04:54,383 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:04:54,383 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:04:54,385 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (1/1) ... [2025-02-07 21:04:54,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:04:54,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:54,415 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) [2025-02-07 21:04:54,424 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 [2025-02-07 21:04:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:04:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:04:54,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:04:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:04:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-02-07 21:04:54,440 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-02-07 21:04:54,474 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:04:54,475 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:04:54,536 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-02-07 21:04:54,541 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-07 21:04:54,541 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:04:54,548 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:04:54,548 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:04:54,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:04:54 BoogieIcfgContainer [2025-02-07 21:04:54,549 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:04:54,551 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:04:54,551 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:04:54,554 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:04:54,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:04:54" (1/3) ... [2025-02-07 21:04:54,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2232f528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:04:54, skipping insertion in model container [2025-02-07 21:04:54,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:54" (2/3) ... [2025-02-07 21:04:54,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2232f528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:04:54, skipping insertion in model container [2025-02-07 21:04:54,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:04:54" (3/3) ... [2025-02-07 21:04:54,556 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2025-02-07 21:04:54,566 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:04:54,567 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_7-1.c that has 2 procedures, 18 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:04:54,600 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:04:54,609 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;@17d81f94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:04:54,611 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:04:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 21:04:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 21:04:54,620 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:54,621 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:54,621 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:54,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash -396287683, now seen corresponding path program 1 times [2025-02-07 21:04:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:54,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080278956] [2025-02-07 21:04:54,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:54,673 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 21:04:54,686 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 21:04:54,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:54,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:04:54,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:54,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080278956] [2025-02-07 21:04:54,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080278956] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:04:54,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:04:54,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:04:54,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767024347] [2025-02-07 21:04:54,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:04:54,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 21:04:54,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:54,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 21:04:54,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:04:54,804 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:04:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:54,851 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2025-02-07 21:04:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 21:04:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2025-02-07 21:04:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:54,856 INFO L225 Difference]: With dead ends: 29 [2025-02-07 21:04:54,857 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 21:04:54,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:04:54,860 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:54,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:04:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 21:04:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2025-02-07 21:04:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-07 21:04:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-02-07 21:04:54,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2025-02-07 21:04:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:54,884 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-02-07 21:04:54,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:04:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-02-07 21:04:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-07 21:04:54,885 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:54,885 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:54,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 21:04:54,885 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:54,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1148952219, now seen corresponding path program 1 times [2025-02-07 21:04:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:54,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809299470] [2025-02-07 21:04:54,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:54,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:54,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-07 21:04:54,894 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 21:04:54,894 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:54,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:04:54,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809299470] [2025-02-07 21:04:54,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809299470] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:04:54,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:04:54,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:04:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859958700] [2025-02-07 21:04:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:04:54,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 21:04:54,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:54,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 21:04:54,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:04:54,937 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:04:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:54,970 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2025-02-07 21:04:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 21:04:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-02-07 21:04:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:54,972 INFO L225 Difference]: With dead ends: 23 [2025-02-07 21:04:54,972 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 21:04:54,972 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:04:54,973 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:54,973 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:04:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 21:04:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2025-02-07 21:04:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-07 21:04:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-02-07 21:04:54,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2025-02-07 21:04:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:54,977 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-02-07 21:04:54,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:04:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-02-07 21:04:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-07 21:04:54,977 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:54,978 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:54,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 21:04:54,978 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:54,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash -123157781, now seen corresponding path program 1 times [2025-02-07 21:04:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:54,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45696173] [2025-02-07 21:04:54,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:54,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:54,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-07 21:04:54,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 21:04:54,994 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:54,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 21:04:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45696173] [2025-02-07 21:04:55,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45696173] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750522432] [2025-02-07 21:04:55,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:55,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:55,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:55,087 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) [2025-02-07 21:04:55,089 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 [2025-02-07 21:04:55,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-07 21:04:55,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 21:04:55,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:55,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:55,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 21:04:55,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 21:04:55,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 21:04:55,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750522432] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:55,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-02-07 21:04:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460801820] [2025-02-07 21:04:55,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:55,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 21:04:55,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:55,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 21:04:55,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-02-07 21:04:55,361 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 11 states, 8 states have (on average 3.375) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-07 21:04:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:55,433 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2025-02-07 21:04:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 21:04:55,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 22 [2025-02-07 21:04:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:55,435 INFO L225 Difference]: With dead ends: 34 [2025-02-07 21:04:55,435 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 21:04:55,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-02-07 21:04:55,436 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:55,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 47 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:04:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 21:04:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-02-07 21:04:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-07 21:04:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-02-07 21:04:55,442 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 22 [2025-02-07 21:04:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:55,442 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-02-07 21:04:55,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-07 21:04:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-02-07 21:04:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 21:04:55,443 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:55,443 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:55,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 21:04:55,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:55,650 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:55,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1895672213, now seen corresponding path program 1 times [2025-02-07 21:04:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:55,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098667740] [2025-02-07 21:04:55,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:55,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:55,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 21:04:55,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 21:04:55,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:55,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:04:55,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:55,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098667740] [2025-02-07 21:04:55,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098667740] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:55,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082658378] [2025-02-07 21:04:55,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:55,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:55,712 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) [2025-02-07 21:04:55,713 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 [2025-02-07 21:04:55,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 21:04:55,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 21:04:55,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:55,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:55,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 21:04:55,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:04:55,759 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 21:04:55,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082658378] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:55,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:55,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-02-07 21:04:55,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990909865] [2025-02-07 21:04:55,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:55,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 21:04:55,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:55,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 21:04:55,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-07 21:04:55,885 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 21:04:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:55,933 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2025-02-07 21:04:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 21:04:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2025-02-07 21:04:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:55,934 INFO L225 Difference]: With dead ends: 28 [2025-02-07 21:04:55,934 INFO L226 Difference]: Without dead ends: 24 [2025-02-07 21:04:55,935 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-07 21:04:55,935 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:55,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 39 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:04:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-07 21:04:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-07 21:04:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-07 21:04:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2025-02-07 21:04:55,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 23 [2025-02-07 21:04:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:55,940 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2025-02-07 21:04:55,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 21:04:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2025-02-07 21:04:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-07 21:04:55,941 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:55,941 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:55,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 21:04:56,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:56,141 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:56,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1431968429, now seen corresponding path program 2 times [2025-02-07 21:04:56,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:56,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467330358] [2025-02-07 21:04:56,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:04:56,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:56,147 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-07 21:04:56,153 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 21:04:56,153 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:04:56,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 21:04:56,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467330358] [2025-02-07 21:04:56,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467330358] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027041647] [2025-02-07 21:04:56,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:04:56,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:56,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:56,282 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) [2025-02-07 21:04:56,285 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 [2025-02-07 21:04:56,310 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-07 21:04:56,320 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 21:04:56,320 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:04:56,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:56,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:04:56,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-07 21:04:56,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-07 21:04:56,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027041647] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:56,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2025-02-07 21:04:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287979830] [2025-02-07 21:04:56,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:56,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 21:04:56,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:56,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 21:04:56,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-02-07 21:04:56,713 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 18 states, 16 states have (on average 2.75) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-07 21:04:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:56,879 INFO L93 Difference]: Finished difference Result 59 states and 92 transitions. [2025-02-07 21:04:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 21:04:56,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 36 [2025-02-07 21:04:56,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:56,880 INFO L225 Difference]: With dead ends: 59 [2025-02-07 21:04:56,880 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 21:04:56,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2025-02-07 21:04:56,881 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:56,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 92 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 21:04:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2025-02-07 21:04:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-02-07 21:04:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2025-02-07 21:04:56,889 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 36 [2025-02-07 21:04:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:56,890 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2025-02-07 21:04:56,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-07 21:04:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2025-02-07 21:04:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-02-07 21:04:56,891 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:56,892 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:56,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 21:04:57,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:57,092 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:57,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:57,093 INFO L85 PathProgramCache]: Analyzing trace with hash -588958223, now seen corresponding path program 3 times [2025-02-07 21:04:57,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:57,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943458642] [2025-02-07 21:04:57,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:04:57,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:57,104 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 12 equivalence classes. [2025-02-07 21:04:57,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 58 of 92 statements. [2025-02-07 21:04:57,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 21:04:57,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 15 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-02-07 21:04:57,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:57,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943458642] [2025-02-07 21:04:57,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943458642] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:57,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968901224] [2025-02-07 21:04:57,224 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:04:57,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:57,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:57,226 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) [2025-02-07 21:04:57,228 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 [2025-02-07 21:04:57,258 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 12 equivalence classes. [2025-02-07 21:04:57,289 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 58 of 92 statements. [2025-02-07 21:04:57,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 21:04:57,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:57,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:04:57,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-02-07 21:04:57,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-02-07 21:04:57,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968901224] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:57,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:57,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 13 [2025-02-07 21:04:57,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116670464] [2025-02-07 21:04:57,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:57,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 21:04:57,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:57,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 21:04:57,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-07 21:04:57,646 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-07 21:04:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:57,762 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2025-02-07 21:04:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 21:04:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 92 [2025-02-07 21:04:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:57,765 INFO L225 Difference]: With dead ends: 71 [2025-02-07 21:04:57,765 INFO L226 Difference]: Without dead ends: 39 [2025-02-07 21:04:57,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2025-02-07 21:04:57,766 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:57,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 78 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-07 21:04:57,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-02-07 21:04:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2025-02-07 21:04:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2025-02-07 21:04:57,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 92 [2025-02-07 21:04:57,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:57,771 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2025-02-07 21:04:57,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-07 21:04:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2025-02-07 21:04:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-02-07 21:04:57,772 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:57,772 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:57,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 21:04:57,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-07 21:04:57,973 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:57,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1971663393, now seen corresponding path program 4 times [2025-02-07 21:04:57,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:57,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374083377] [2025-02-07 21:04:57,973 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:04:57,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:57,978 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 78 statements into 2 equivalence classes. [2025-02-07 21:04:57,989 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 65 of 78 statements. [2025-02-07 21:04:57,989 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:04:57,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 121 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2025-02-07 21:04:58,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374083377] [2025-02-07 21:04:58,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374083377] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948229162] [2025-02-07 21:04:58,144 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:04:58,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:58,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:58,146 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) [2025-02-07 21:04:58,150 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 [2025-02-07 21:04:58,176 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 78 statements into 2 equivalence classes. [2025-02-07 21:04:58,186 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 65 of 78 statements. [2025-02-07 21:04:58,187 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:04:58,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:58,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 21:04:58,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 122 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-02-07 21:04:58,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 134 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-02-07 21:04:58,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948229162] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:58,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:58,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-02-07 21:04:58,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182712118] [2025-02-07 21:04:58,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:58,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 21:04:58,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:58,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 21:04:58,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-02-07 21:04:58,919 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2025-02-07 21:04:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:59,104 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2025-02-07 21:04:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 21:04:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 78 [2025-02-07 21:04:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:59,106 INFO L225 Difference]: With dead ends: 85 [2025-02-07 21:04:59,106 INFO L226 Difference]: Without dead ends: 51 [2025-02-07 21:04:59,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2025-02-07 21:04:59,107 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:59,107 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 79 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-02-07 21:04:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2025-02-07 21:04:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2025-02-07 21:04:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2025-02-07 21:04:59,113 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 78 [2025-02-07 21:04:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:59,113 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2025-02-07 21:04:59,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2025-02-07 21:04:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2025-02-07 21:04:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-02-07 21:04:59,114 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:59,114 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:59,120 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 [2025-02-07 21:04:59,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:59,317 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:59,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash 647110413, now seen corresponding path program 5 times [2025-02-07 21:04:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081297135] [2025-02-07 21:04:59,317 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:04:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:59,321 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 64 statements into 8 equivalence classes. [2025-02-07 21:04:59,327 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 64 of 64 statements. [2025-02-07 21:04:59,327 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 21:04:59,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 39 proven. 57 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-07 21:04:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081297135] [2025-02-07 21:04:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081297135] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588386937] [2025-02-07 21:04:59,386 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:04:59,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:59,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:59,388 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) [2025-02-07 21:04:59,390 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 [2025-02-07 21:04:59,416 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 64 statements into 8 equivalence classes. [2025-02-07 21:04:59,431 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 64 of 64 statements. [2025-02-07 21:04:59,431 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 21:04:59,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:59,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:04:59,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2025-02-07 21:04:59,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-07 21:04:59,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588386937] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:59,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:59,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 12 [2025-02-07 21:04:59,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857689409] [2025-02-07 21:04:59,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:59,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 21:04:59,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:59,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 21:04:59,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-02-07 21:04:59,716 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-07 21:04:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:59,786 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2025-02-07 21:04:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 21:04:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 64 [2025-02-07 21:04:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:59,787 INFO L225 Difference]: With dead ends: 50 [2025-02-07 21:04:59,787 INFO L226 Difference]: Without dead ends: 46 [2025-02-07 21:04:59,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2025-02-07 21:04:59,788 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:59,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 50 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:04:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-07 21:04:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-02-07 21:04:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-07 21:04:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-02-07 21:04:59,799 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 64 [2025-02-07 21:04:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:59,800 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-02-07 21:04:59,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-07 21:04:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-02-07 21:04:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-02-07 21:04:59,801 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:59,801 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 10, 6, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:59,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 21:05:00,002 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,SelfDestructingSolverStorable7 [2025-02-07 21:05:00,002 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:00,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1699155029, now seen corresponding path program 6 times [2025-02-07 21:05:00,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375335806] [2025-02-07 21:05:00,003 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:00,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:00,008 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 91 statements into 10 equivalence classes. [2025-02-07 21:05:00,018 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 74 of 91 statements. [2025-02-07 21:05:00,018 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 21:05:00,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 116 proven. 31 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2025-02-07 21:05:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375335806] [2025-02-07 21:05:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375335806] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162587252] [2025-02-07 21:05:00,099 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:00,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:00,101 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) [2025-02-07 21:05:00,103 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 [2025-02-07 21:05:00,130 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 91 statements into 10 equivalence classes. [2025-02-07 21:05:00,147 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 74 of 91 statements. [2025-02-07 21:05:00,147 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 21:05:00,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:00,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:05:00,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 118 proven. 34 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2025-02-07 21:05:00,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 120 proven. 39 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2025-02-07 21:05:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162587252] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:00,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:00,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2025-02-07 21:05:00,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945679252] [2025-02-07 21:05:00,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:00,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 21:05:00,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:00,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 21:05:00,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-02-07 21:05:00,459 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2025-02-07 21:05:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:00,530 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2025-02-07 21:05:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 21:05:00,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 91 [2025-02-07 21:05:00,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:00,531 INFO L225 Difference]: With dead ends: 56 [2025-02-07 21:05:00,531 INFO L226 Difference]: Without dead ends: 52 [2025-02-07 21:05:00,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2025-02-07 21:05:00,532 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:00,532 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:00,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-07 21:05:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2025-02-07 21:05:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-07 21:05:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-02-07 21:05:00,539 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 91 [2025-02-07 21:05:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:00,539 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-02-07 21:05:00,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2025-02-07 21:05:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-02-07 21:05:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2025-02-07 21:05:00,540 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:00,540 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:00,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:00,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:00,741 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:00,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 347035073, now seen corresponding path program 7 times [2025-02-07 21:05:00,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:00,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513685094] [2025-02-07 21:05:00,741 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:05:00,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:00,746 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 132 statements into 1 equivalence classes. [2025-02-07 21:05:00,758 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 132 of 132 statements. [2025-02-07 21:05:00,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:00,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 326 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2025-02-07 21:05:00,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513685094] [2025-02-07 21:05:00,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513685094] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545087189] [2025-02-07 21:05:00,891 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:05:00,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:00,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:00,895 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) [2025-02-07 21:05:00,896 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 [2025-02-07 21:05:00,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 132 statements into 1 equivalence classes. [2025-02-07 21:05:00,970 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 132 of 132 statements. [2025-02-07 21:05:00,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:00,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:00,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 21:05:00,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 326 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2025-02-07 21:05:01,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 352 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2025-02-07 21:05:01,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545087189] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:01,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:01,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2025-02-07 21:05:01,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117847644] [2025-02-07 21:05:01,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:01,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 21:05:01,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:01,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 21:05:01,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-02-07 21:05:01,687 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 15 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2025-02-07 21:05:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:01,773 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2025-02-07 21:05:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 21:05:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) Word has length 132 [2025-02-07 21:05:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:01,774 INFO L225 Difference]: With dead ends: 55 [2025-02-07 21:05:01,774 INFO L226 Difference]: Without dead ends: 51 [2025-02-07 21:05:01,775 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 257 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2025-02-07 21:05:01,775 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:01,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 64 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-02-07 21:05:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-02-07 21:05:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (21), 11 states have call predecessors, (21), 8 states have call successors, (21) [2025-02-07 21:05:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2025-02-07 21:05:01,781 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 132 [2025-02-07 21:05:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:01,781 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2025-02-07 21:05:01,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2025-02-07 21:05:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2025-02-07 21:05:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2025-02-07 21:05:01,783 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:01,783 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:01,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 21:05:01,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:01,987 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:01,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:01,987 INFO L85 PathProgramCache]: Analyzing trace with hash 499279383, now seen corresponding path program 8 times [2025-02-07 21:05:01,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:01,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668602861] [2025-02-07 21:05:01,988 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:01,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:01,993 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 214 statements into 2 equivalence classes. [2025-02-07 21:05:02,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 214 of 214 statements. [2025-02-07 21:05:02,009 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:02,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2025-02-07 21:05:02,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:02,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668602861] [2025-02-07 21:05:02,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668602861] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:02,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539683259] [2025-02-07 21:05:02,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:02,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:02,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:02,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:02,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 21:05:02,266 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 214 statements into 2 equivalence classes. [2025-02-07 21:05:02,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 214 of 214 statements. [2025-02-07 21:05:02,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:02,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:02,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 21:05:02,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2025-02-07 21:05:02,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 756 refuted. 0 times theorem prover too weak. 1716 trivial. 0 not checked. [2025-02-07 21:05:03,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539683259] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:03,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:03,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 16 [2025-02-07 21:05:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935417619] [2025-02-07 21:05:03,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:03,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-07 21:05:03,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:03,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-07 21:05:03,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2025-02-07 21:05:03,567 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 13 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 13 states have call successors, (18) [2025-02-07 21:05:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:03,691 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2025-02-07 21:05:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 21:05:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 13 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 13 states have call successors, (18) Word has length 214 [2025-02-07 21:05:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:03,692 INFO L225 Difference]: With dead ends: 60 [2025-02-07 21:05:03,692 INFO L226 Difference]: Without dead ends: 56 [2025-02-07 21:05:03,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 420 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2025-02-07 21:05:03,693 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:03,693 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 61 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-07 21:05:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2025-02-07 21:05:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2025-02-07 21:05:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2025-02-07 21:05:03,703 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 214 [2025-02-07 21:05:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:03,703 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2025-02-07 21:05:03,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 13 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 13 states have call successors, (18) [2025-02-07 21:05:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2025-02-07 21:05:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2025-02-07 21:05:03,705 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:03,706 INFO L218 NwaCegarLoop]: trace histogram [55, 55, 44, 27, 27, 27, 27, 27, 27, 27, 17, 11, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:03,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:03,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:03,921 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:03,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2048710223, now seen corresponding path program 9 times [2025-02-07 21:05:03,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:03,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980919384] [2025-02-07 21:05:03,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:03,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:03,934 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 377 statements into 50 equivalence classes. [2025-02-07 21:05:03,957 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) and asserted 192 of 377 statements. [2025-02-07 21:05:03,957 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2025-02-07 21:05:03,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8290 backedges. 1617 proven. 357 refuted. 0 times theorem prover too weak. 6316 trivial. 0 not checked. [2025-02-07 21:05:04,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:04,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980919384] [2025-02-07 21:05:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980919384] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:04,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395140764] [2025-02-07 21:05:04,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:04,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:04,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:04,129 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:04,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 21:05:04,189 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 377 statements into 50 equivalence classes. [2025-02-07 21:05:04,250 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) and asserted 192 of 377 statements. [2025-02-07 21:05:04,250 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2025-02-07 21:05:04,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:04,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 21:05:04,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8290 backedges. 2911 proven. 189 refuted. 0 times theorem prover too weak. 5190 trivial. 0 not checked. [2025-02-07 21:05:04,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8290 backedges. 1617 proven. 367 refuted. 0 times theorem prover too weak. 6306 trivial. 0 not checked. [2025-02-07 21:05:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395140764] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:05,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 19 [2025-02-07 21:05:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741774975] [2025-02-07 21:05:05,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:05,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 21:05:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:05,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 21:05:05,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-02-07 21:05:05,467 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 11 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-07 21:05:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:05,726 INFO L93 Difference]: Finished difference Result 132 states and 207 transitions. [2025-02-07 21:05:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-07 21:05:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 11 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) Word has length 377 [2025-02-07 21:05:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:05,727 INFO L225 Difference]: With dead ends: 132 [2025-02-07 21:05:05,727 INFO L226 Difference]: Without dead ends: 72 [2025-02-07 21:05:05,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 743 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=370, Invalid=890, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 21:05:05,731 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:05,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 98 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-02-07 21:05:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2025-02-07 21:05:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2025-02-07 21:05:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2025-02-07 21:05:05,741 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 377 [2025-02-07 21:05:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:05,742 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2025-02-07 21:05:05,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 11 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-07 21:05:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2025-02-07 21:05:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2025-02-07 21:05:05,745 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:05,745 INFO L218 NwaCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:05,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 21:05:05,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 21:05:05,946 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:05,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1022481803, now seen corresponding path program 10 times [2025-02-07 21:05:05,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:05,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752076245] [2025-02-07 21:05:05,946 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:05,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:05,963 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 350 statements into 2 equivalence classes. [2025-02-07 21:05:05,982 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 297 of 350 statements. [2025-02-07 21:05:05,982 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:05:05,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 822 proven. 1694 refuted. 0 times theorem prover too weak. 4604 trivial. 0 not checked. [2025-02-07 21:05:06,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:06,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752076245] [2025-02-07 21:05:06,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752076245] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:06,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112648926] [2025-02-07 21:05:06,326 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:06,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:06,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:06,329 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:06,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 21:05:06,398 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 350 statements into 2 equivalence classes. [2025-02-07 21:05:06,440 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 297 of 350 statements. [2025-02-07 21:05:06,440 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:05:06,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:06,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-07 21:05:06,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 984 proven. 1855 refuted. 0 times theorem prover too weak. 4281 trivial. 0 not checked. [2025-02-07 21:05:06,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 984 proven. 1930 refuted. 0 times theorem prover too weak. 4206 trivial. 0 not checked. [2025-02-07 21:05:08,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112648926] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:08,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:08,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 32 [2025-02-07 21:05:08,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833949359] [2025-02-07 21:05:08,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:08,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 21:05:08,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:08,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 21:05:08,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2025-02-07 21:05:08,744 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 25 states have call successors, (29), 1 states have call predecessors, (29), 14 states have return successors, (39), 15 states have call predecessors, (39), 25 states have call successors, (39) [2025-02-07 21:05:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:09,191 INFO L93 Difference]: Finished difference Result 174 states and 315 transitions. [2025-02-07 21:05:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-07 21:05:09,192 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 25 states have call successors, (29), 1 states have call predecessors, (29), 14 states have return successors, (39), 15 states have call predecessors, (39), 25 states have call successors, (39) Word has length 350 [2025-02-07 21:05:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:09,193 INFO L225 Difference]: With dead ends: 174 [2025-02-07 21:05:09,193 INFO L226 Difference]: Without dead ends: 113 [2025-02-07 21:05:09,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 680 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=824, Invalid=2482, Unknown=0, NotChecked=0, Total=3306 [2025-02-07 21:05:09,198 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 237 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:09,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 159 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:05:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-02-07 21:05:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2025-02-07 21:05:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 61 states have internal predecessors, (65), 17 states have call successors, (17), 13 states have call predecessors, (17), 8 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2025-02-07 21:05:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2025-02-07 21:05:09,218 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 350 [2025-02-07 21:05:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:09,218 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2025-02-07 21:05:09,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 25 states have call successors, (29), 1 states have call predecessors, (29), 14 states have return successors, (39), 15 states have call predecessors, (39), 25 states have call successors, (39) [2025-02-07 21:05:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2025-02-07 21:05:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2025-02-07 21:05:09,221 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:09,221 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:09,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 21:05:09,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-07 21:05:09,425 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:09,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:09,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1924259153, now seen corresponding path program 11 times [2025-02-07 21:05:09,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:09,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449924685] [2025-02-07 21:05:09,426 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:09,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:09,433 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 282 statements into 41 equivalence classes. [2025-02-07 21:05:09,467 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) and asserted 282 of 282 statements. [2025-02-07 21:05:09,467 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2025-02-07 21:05:09,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 7 proven. 1504 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2025-02-07 21:05:11,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449924685] [2025-02-07 21:05:11,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449924685] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:11,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540715047] [2025-02-07 21:05:11,208 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:11,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:11,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:11,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:11,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 21:05:11,297 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 282 statements into 41 equivalence classes. [2025-02-07 21:05:11,356 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) and asserted 282 of 282 statements. [2025-02-07 21:05:11,356 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2025-02-07 21:05:11,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:11,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 167 conjuncts are in the unsatisfiable core [2025-02-07 21:05:11,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2025-02-07 21:05:11,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2025-02-07 21:05:12,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540715047] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:12,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:12,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 28 [2025-02-07 21:05:12,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145025665] [2025-02-07 21:05:12,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:12,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-07 21:05:12,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:12,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-07 21:05:12,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2025-02-07 21:05:12,503 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-07 21:05:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:12,662 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2025-02-07 21:05:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 21:05:12,662 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) Word has length 282 [2025-02-07 21:05:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:12,664 INFO L225 Difference]: With dead ends: 102 [2025-02-07 21:05:12,664 INFO L226 Difference]: Without dead ends: 98 [2025-02-07 21:05:12,664 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2025-02-07 21:05:12,665 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:12,665 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 643 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-02-07 21:05:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2025-02-07 21:05:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 66 states have internal predecessors, (70), 18 states have call successors, (18), 13 states have call predecessors, (18), 10 states have return successors, (49), 17 states have call predecessors, (49), 18 states have call successors, (49) [2025-02-07 21:05:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2025-02-07 21:05:12,672 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 282 [2025-02-07 21:05:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:12,672 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2025-02-07 21:05:12,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-07 21:05:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2025-02-07 21:05:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2025-02-07 21:05:12,678 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:12,678 INFO L218 NwaCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:12,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:12,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:12,878 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:12,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1271230731, now seen corresponding path program 12 times [2025-02-07 21:05:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:12,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414003208] [2025-02-07 21:05:12,879 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:12,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:12,886 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 350 statements into 45 equivalence classes. [2025-02-07 21:05:12,908 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 209 of 350 statements. [2025-02-07 21:05:12,908 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-07 21:05:12,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 490 proven. 1084 refuted. 0 times theorem prover too weak. 5546 trivial. 0 not checked. [2025-02-07 21:05:13,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:13,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414003208] [2025-02-07 21:05:13,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414003208] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:13,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876253759] [2025-02-07 21:05:13,120 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:13,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:13,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:13,127 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:05:13,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 21:05:13,217 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 350 statements into 45 equivalence classes. [2025-02-07 21:05:13,270 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 209 of 350 statements. [2025-02-07 21:05:13,270 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-07 21:05:13,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:13,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 21:05:13,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 524 proven. 1187 refuted. 0 times theorem prover too weak. 5409 trivial. 0 not checked. [2025-02-07 21:05:13,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 530 proven. 1232 refuted. 0 times theorem prover too weak. 5358 trivial. 0 not checked. [2025-02-07 21:05:14,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876253759] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:14,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:14,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 17] total 23 [2025-02-07 21:05:14,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591581385] [2025-02-07 21:05:14,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:14,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 21:05:14,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:14,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 21:05:14,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2025-02-07 21:05:14,911 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 23 states have internal predecessors, (65), 16 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (25), 12 states have call predecessors, (25), 16 states have call successors, (25) [2025-02-07 21:05:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:15,054 INFO L93 Difference]: Finished difference Result 108 states and 151 transitions. [2025-02-07 21:05:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:05:15,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 23 states have internal predecessors, (65), 16 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (25), 12 states have call predecessors, (25), 16 states have call successors, (25) Word has length 350 [2025-02-07 21:05:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:15,056 INFO L225 Difference]: With dead ends: 108 [2025-02-07 21:05:15,057 INFO L226 Difference]: Without dead ends: 0 [2025-02-07 21:05:15,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 687 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2025-02-07 21:05:15,058 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:15,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-07 21:05:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-07 21:05:15,059 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) [2025-02-07 21:05:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-07 21:05:15,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 350 [2025-02-07 21:05:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:15,059 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-07 21:05:15,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 23 states have internal predecessors, (65), 16 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (25), 12 states have call predecessors, (25), 16 states have call successors, (25) [2025-02-07 21:05:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-07 21:05:15,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-07 21:05:15,063 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-07 21:05:15,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:15,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:15,266 INFO L422 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1] [2025-02-07 21:05:15,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-07 21:05:16,231 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-07 21:05:16,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 09:05:16 BoogieIcfgContainer [2025-02-07 21:05:16,237 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-07 21:05:16,237 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-07 21:05:16,237 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-07 21:05:16,238 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-07 21:05:16,238 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:04:54" (3/4) ... [2025-02-07 21:05:16,240 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-07 21:05:16,246 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibo [2025-02-07 21:05:16,249 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-02-07 21:05:16,250 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-07 21:05:16,250 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-07 21:05:16,250 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-07 21:05:16,313 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-07 21:05:16,313 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-07 21:05:16,313 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-07 21:05:16,314 INFO L158 Benchmark]: Toolchain (without parser) took 22121.14ms. Allocated memory was 142.6MB in the beginning and 478.2MB in the end (delta: 335.5MB). Free memory was 105.5MB in the beginning and 346.4MB in the end (delta: -240.9MB). Peak memory consumption was 94.8MB. Max. memory is 16.1GB. [2025-02-07 21:05:16,314 INFO L158 Benchmark]: CDTParser took 0.93ms. Allocated memory is still 201.3MB. Free memory is still 115.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 21:05:16,314 INFO L158 Benchmark]: CACSL2BoogieTranslator took 141.58ms. Allocated memory is still 142.6MB. Free memory was 105.5MB in the beginning and 95.5MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 21:05:16,315 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.82ms. Allocated memory is still 142.6MB. Free memory was 95.5MB in the beginning and 94.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 21:05:16,315 INFO L158 Benchmark]: Boogie Preprocessor took 22.17ms. Allocated memory is still 142.6MB. Free memory was 94.5MB in the beginning and 93.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 21:05:16,315 INFO L158 Benchmark]: IcfgBuilder took 165.94ms. Allocated memory is still 142.6MB. Free memory was 93.5MB in the beginning and 82.8MB in the end (delta: 10.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-07 21:05:16,315 INFO L158 Benchmark]: TraceAbstraction took 21685.64ms. Allocated memory was 142.6MB in the beginning and 478.2MB in the end (delta: 335.5MB). Free memory was 81.8MB in the beginning and 350.7MB in the end (delta: -268.9MB). Peak memory consumption was 257.0MB. Max. memory is 16.1GB. [2025-02-07 21:05:16,315 INFO L158 Benchmark]: Witness Printer took 76.21ms. Allocated memory is still 478.2MB. Free memory was 350.7MB in the beginning and 346.4MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 21:05:16,318 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.93ms. Allocated memory is still 201.3MB. Free memory is still 115.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 141.58ms. Allocated memory is still 142.6MB. Free memory was 105.5MB in the beginning and 95.5MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.82ms. Allocated memory is still 142.6MB. Free memory was 95.5MB in the beginning and 94.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.17ms. Allocated memory is still 142.6MB. Free memory was 94.5MB in the beginning and 93.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 165.94ms. Allocated memory is still 142.6MB. Free memory was 93.5MB in the beginning and 82.8MB in the end (delta: 10.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 21685.64ms. Allocated memory was 142.6MB in the beginning and 478.2MB in the end (delta: 335.5MB). Free memory was 81.8MB in the beginning and 350.7MB in the end (delta: -268.9MB). Peak memory consumption was 257.0MB. Max. memory is 16.1GB. * Witness Printer took 76.21ms. Allocated memory is still 478.2MB. Free memory was 350.7MB in the beginning and 346.4MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. 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: 29]: 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, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 20.7s, OverallIterations: 15, TraceHistogramMax: 55, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 700 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 648 mSDsluCounter, 1634 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1366 mSDsCounter, 625 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2031 IncrementalHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 625 mSolverCounterUnsat, 268 mSDtfsCounter, 2031 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4543 GetRequests, 4178 SyntacticMatches, 65 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=14, InterpolantAutomatonStates: 195, 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, 15 MinimizatonAttempts, 52 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 14.3s InterpolantComputationTime, 4241 NumberOfCodeBlocks, 3355 NumberOfCodeBlocksAsserted, 252 NumberOfCheckSat, 6311 ConstructedInterpolants, 0 QuantifiedInterpolants, 10650 SizeOfPredicates, 46 NumberOfNonLiveVariables, 3886 ConjunctsInSsa, 307 ConjunctsInUnsatCore, 41 InterpolantComputations, 2 PerfectInterpolantSequences, 77648/96036 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! [2025-02-07 21:05:16,342 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