./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.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 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:57:13,147 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:57:13,204 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:57:13,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:57:13,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:57:13,229 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:57:13,229 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:57:13,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:57:13,230 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:57:13,230 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:57:13,231 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:57:13,231 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:57:13,231 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:57:13,231 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:57:13,232 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:57:13,232 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:57:13,232 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:57:13,232 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:57:13,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:57:13,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:57:13,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:57:13,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:57:13,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:57:13,233 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:57:13,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:57:13,234 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:57:13,234 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:57:13,234 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:57:13,234 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:57:13,234 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:57:13,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:57:13,234 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:57:13,234 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:57:13,235 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:57:13,235 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:57:13,235 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 -> 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 [2025-02-05 15:57:13,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:57:13,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:57:13,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:57:13,462 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:57:13,462 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:57:13,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2025-02-05 15:57:14,610 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d57ef8161/2092d0cf54e145e8853f3b6f20f95108/FLAGd552f2e54 [2025-02-05 15:57:14,793 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:57:14,794 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2025-02-05 15:57:14,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d57ef8161/2092d0cf54e145e8853f3b6f20f95108/FLAGd552f2e54 [2025-02-05 15:57:15,160 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d57ef8161/2092d0cf54e145e8853f3b6f20f95108 [2025-02-05 15:57:15,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:57:15,163 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:57:15,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:57:15,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:57:15,170 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:57:15,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18584c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15, skipping insertion in model container [2025-02-05 15:57:15,175 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,184 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:57:15,295 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_2calls_20-1.c[951,964] [2025-02-05 15:57:15,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:57:15,307 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:57:15,316 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_2calls_20-1.c[951,964] [2025-02-05 15:57:15,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:57:15,327 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:57:15,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15 WrapperNode [2025-02-05 15:57:15,329 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:57:15,330 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:57:15,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:57:15,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:57:15,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,337 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,346 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-02-05 15:57:15,347 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:57:15,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:57:15,348 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:57:15,348 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:57:15,352 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,354 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,363 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 15:57:15,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,365 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:57:15,373 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:57:15,373 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:57:15,373 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:57:15,374 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (1/1) ... [2025-02-05 15:57:15,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:57:15,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:15,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:57:15,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:57:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:57:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:57:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-02-05 15:57:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-02-05 15:57:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-02-05 15:57:15,417 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-02-05 15:57:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:57:15,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:57:15,458 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:57:15,460 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:57:15,539 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-02-05 15:57:15,549 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-02-05 15:57:15,554 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-05 15:57:15,554 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:57:15,560 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:57:15,560 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:57:15,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:57:15 BoogieIcfgContainer [2025-02-05 15:57:15,561 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:57:15,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:57:15,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:57:15,565 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:57:15,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:57:15" (1/3) ... [2025-02-05 15:57:15,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c69bd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:57:15, skipping insertion in model container [2025-02-05 15:57:15,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:15" (2/3) ... [2025-02-05 15:57:15,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c69bd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:57:15, skipping insertion in model container [2025-02-05 15:57:15,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:57:15" (3/3) ... [2025-02-05 15:57:15,567 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2025-02-05 15:57:15,577 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:57:15,579 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_20-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 15:57:15,622 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:57:15,631 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;@1385d4e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:57:15,631 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:57:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:57:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:57:15,639 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:15,640 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:15,640 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:15,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:15,645 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-02-05 15:57:15,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635575770] [2025-02-05 15:57:15,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:15,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:15,701 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:57:15,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:57:15,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:15,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:57:15,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:15,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635575770] [2025-02-05 15:57:15,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635575770] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:57:15,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:57:15,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:57:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692717042] [2025-02-05 15:57:15,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:57:15,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:57:15,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:15,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:57:15,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:57:15,849 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:57:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:15,878 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2025-02-05 15:57:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:57:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-02-05 15:57:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:15,884 INFO L225 Difference]: With dead ends: 39 [2025-02-05 15:57:15,884 INFO L226 Difference]: Without dead ends: 27 [2025-02-05 15:57:15,886 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 [2025-02-05 15:57:15,889 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:15,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:57:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-05 15:57:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-05 15:57:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 15:57:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-02-05 15:57:15,915 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-02-05 15:57:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:15,915 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-02-05 15:57:15,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:57:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-02-05 15:57:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 15:57:15,916 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:15,916 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:15,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:57:15,916 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:15,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-02-05 15:57:15,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:15,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486188197] [2025-02-05 15:57:15,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:15,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:15,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 15:57:15,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 15:57:15,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:15,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:57:15,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:15,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486188197] [2025-02-05 15:57:15,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486188197] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:57:15,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:57:15,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:57:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520211382] [2025-02-05 15:57:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:57:15,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:57:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:15,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:57:15,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:57:15,982 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:57:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:15,998 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-02-05 15:57:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:57:15,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-02-05 15:57:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:15,999 INFO L225 Difference]: With dead ends: 33 [2025-02-05 15:57:15,999 INFO L226 Difference]: Without dead ends: 29 [2025-02-05 15:57:15,999 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 [2025-02-05 15:57:16,000 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:16,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:57:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-05 15:57:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-02-05 15:57:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 15:57:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-02-05 15:57:16,004 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-02-05 15:57:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:16,005 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-02-05 15:57:16,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:57:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-02-05 15:57:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 15:57:16,005 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:16,006 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:16,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:57:16,006 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:16,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-02-05 15:57:16,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:16,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779432444] [2025-02-05 15:57:16,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:16,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:16,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:57:16,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:57:16,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:16,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:16,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779432444] [2025-02-05 15:57:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779432444] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50396435] [2025-02-05 15:57:16,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:16,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:16,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:16,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:16,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:57:16,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:57:16,167 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:57:16,167 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:16,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:16,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:57:16,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:16,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:16,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50396435] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:16,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:16,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-02-05 15:57:16,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091469091] [2025-02-05 15:57:16,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:16,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:57:16,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:16,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:57:16,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:57:16,427 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:57:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:16,520 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-02-05 15:57:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:57:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-02-05 15:57:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:16,521 INFO L225 Difference]: With dead ends: 55 [2025-02-05 15:57:16,521 INFO L226 Difference]: Without dead ends: 31 [2025-02-05 15:57:16,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:57:16,522 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:16,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-05 15:57:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-02-05 15:57:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-02-05 15:57:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-02-05 15:57:16,528 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-02-05 15:57:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:16,529 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-02-05 15:57:16,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:57:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-02-05 15:57:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 15:57:16,530 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:16,530 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:16,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:57:16,730 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 [2025-02-05 15:57:16,730 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:16,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:16,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-02-05 15:57:16,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:16,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350528116] [2025-02-05 15:57:16,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:16,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:16,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:57:16,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:57:16,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:16,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:16,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:16,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350528116] [2025-02-05 15:57:16,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350528116] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:16,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548434747] [2025-02-05 15:57:16,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:16,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:16,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:16,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:16,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:57:16,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:57:16,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:57:16,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:16,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:16,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:57:16,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:16,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:17,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548434747] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:17,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:17,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-02-05 15:57:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456827257] [2025-02-05 15:57:17,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:17,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:57:17,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:17,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:57:17,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:57:17,056 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:57:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:17,164 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-02-05 15:57:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:57:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-02-05 15:57:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:17,165 INFO L225 Difference]: With dead ends: 40 [2025-02-05 15:57:17,166 INFO L226 Difference]: Without dead ends: 36 [2025-02-05 15:57:17,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:57:17,167 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:17,167 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-05 15:57:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-02-05 15:57:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-02-05 15:57:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-02-05 15:57:17,176 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-02-05 15:57:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:17,176 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-02-05 15:57:17,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:57:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-02-05 15:57:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-05 15:57:17,177 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:17,177 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:17,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 15:57:17,378 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 [2025-02-05 15:57:17,378 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:17,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-02-05 15:57:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:17,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755452150] [2025-02-05 15:57:17,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:17,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 15:57:17,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 15:57:17,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:17,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:57:17,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755452150] [2025-02-05 15:57:17,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755452150] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530896732] [2025-02-05 15:57:17,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:17,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:17,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:17,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:17,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:57:17,485 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 15:57:17,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 15:57:17,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:17,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:17,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:17,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:57:17,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:57:17,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530896732] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:17,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:17,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-02-05 15:57:17,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101995073] [2025-02-05 15:57:17,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:17,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-05 15:57:17,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:17,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-05 15:57:17,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:57:17,822 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:17,934 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-02-05 15:57:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:57:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-02-05 15:57:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:17,935 INFO L225 Difference]: With dead ends: 69 [2025-02-05 15:57:17,935 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 15:57:17,936 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:57:17,936 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:17,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 15:57:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-02-05 15:57:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-05 15:57:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-02-05 15:57:17,946 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-02-05 15:57:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:17,946 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-02-05 15:57:17,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-02-05 15:57:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 15:57:17,947 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:17,947 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:17,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:18,147 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 [2025-02-05 15:57:18,148 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:18,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-02-05 15:57:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732146413] [2025-02-05 15:57:18,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:18,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 15:57:18,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:57:18,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:18,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 15:57:18,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:18,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732146413] [2025-02-05 15:57:18,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732146413] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:18,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618297884] [2025-02-05 15:57:18,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:18,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:18,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:18,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:18,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:57:18,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 15:57:18,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:57:18,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:18,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:18,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:18,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:57:18,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:57:18,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618297884] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:18,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:18,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-02-05 15:57:18,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625034940] [2025-02-05 15:57:18,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:18,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:57:18,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:18,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:57:18,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:57:18,627 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:18,955 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-02-05 15:57:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:57:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-02-05 15:57:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:18,957 INFO L225 Difference]: With dead ends: 101 [2025-02-05 15:57:18,958 INFO L226 Difference]: Without dead ends: 68 [2025-02-05 15:57:18,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:57:18,960 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:18,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:57:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-05 15:57:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-02-05 15:57:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-02-05 15:57:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-02-05 15:57:18,971 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-02-05 15:57:18,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:18,971 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-02-05 15:57:18,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:18,971 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-02-05 15:57:18,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 15:57:18,972 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:18,973 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:18,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:57:19,177 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 [2025-02-05 15:57:19,178 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:19,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-02-05 15:57:19,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:19,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444323024] [2025-02-05 15:57:19,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:19,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 15:57:19,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:57:19,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:19,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-05 15:57:19,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:19,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444323024] [2025-02-05 15:57:19,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444323024] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:19,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341276906] [2025-02-05 15:57:19,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:19,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:19,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:19,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:19,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:57:19,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 15:57:19,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:57:19,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:19,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:19,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:57:19,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 15:57:19,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:57:19,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341276906] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:19,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:19,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-02-05 15:57:19,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598485359] [2025-02-05 15:57:19,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:19,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:57:19,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:19,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:57:19,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:57:19,751 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:57:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:19,916 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-02-05 15:57:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2025-02-05 15:57:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:19,918 INFO L225 Difference]: With dead ends: 102 [2025-02-05 15:57:19,918 INFO L226 Difference]: Without dead ends: 98 [2025-02-05 15:57:19,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:57:19,919 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:19,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 161 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-02-05 15:57:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-02-05 15:57:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-02-05 15:57:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-02-05 15:57:19,940 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-02-05 15:57:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:19,940 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-02-05 15:57:19,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:57:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-02-05 15:57:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-05 15:57:19,942 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:19,942 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:19,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:20,142 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 [2025-02-05 15:57:20,143 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:20,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:20,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1518497941, now seen corresponding path program 1 times [2025-02-05 15:57:20,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:20,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67291369] [2025-02-05 15:57:20,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:20,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:20,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:57:20,154 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:57:20,154 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:20,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-05 15:57:20,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:20,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67291369] [2025-02-05 15:57:20,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67291369] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:20,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672601189] [2025-02-05 15:57:20,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:20,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:20,269 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:20,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:57:20,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:57:20,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:57:20,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:20,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:20,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:57:20,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-05 15:57:20,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-05 15:57:21,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672601189] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:21,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:21,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-02-05 15:57:21,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007378960] [2025-02-05 15:57:21,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:21,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:57:21,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:21,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:57:21,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:21,052 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) [2025-02-05 15:57:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:21,551 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-02-05 15:57:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 15:57:21,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) Word has length 80 [2025-02-05 15:57:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:21,553 INFO L225 Difference]: With dead ends: 177 [2025-02-05 15:57:21,553 INFO L226 Difference]: Without dead ends: 104 [2025-02-05 15:57:21,555 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 15:57:21,555 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 78 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:21,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 395 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:57:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-05 15:57:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-02-05 15:57:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-02-05 15:57:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-02-05 15:57:21,565 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 80 [2025-02-05 15:57:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:21,565 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-02-05 15:57:21,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) [2025-02-05 15:57:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-02-05 15:57:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2025-02-05 15:57:21,568 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:21,569 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:21,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 15:57:21,773 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 [2025-02-05 15:57:21,773 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:21,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash -966893141, now seen corresponding path program 1 times [2025-02-05 15:57:21,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:21,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321319257] [2025-02-05 15:57:21,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:21,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:21,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 160 statements into 1 equivalence classes. [2025-02-05 15:57:21,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 160 of 160 statements. [2025-02-05 15:57:21,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:21,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 47 proven. 183 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2025-02-05 15:57:21,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:21,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321319257] [2025-02-05 15:57:21,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321319257] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:21,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136026659] [2025-02-05 15:57:21,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:21,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:21,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:21,952 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:21,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:57:21,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 160 statements into 1 equivalence classes. [2025-02-05 15:57:22,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 160 of 160 statements. [2025-02-05 15:57:22,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:22,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:22,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:57:22,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 34 proven. 239 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2025-02-05 15:57:22,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 34 proven. 255 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2025-02-05 15:57:23,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136026659] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:23,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:23,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-02-05 15:57:23,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522898931] [2025-02-05 15:57:23,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:23,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:57:23,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:23,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:57:23,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:23,100 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-05 15:57:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:23,298 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-02-05 15:57:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:57:23,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 160 [2025-02-05 15:57:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:23,300 INFO L225 Difference]: With dead ends: 132 [2025-02-05 15:57:23,300 INFO L226 Difference]: Without dead ends: 128 [2025-02-05 15:57:23,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 304 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:57:23,301 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:23,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 188 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-02-05 15:57:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-02-05 15:57:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-02-05 15:57:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-02-05 15:57:23,317 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 160 [2025-02-05 15:57:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:23,318 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-02-05 15:57:23,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-05 15:57:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-02-05 15:57:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2025-02-05 15:57:23,320 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:23,320 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:23,326 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 [2025-02-05 15:57:23,525 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 [2025-02-05 15:57:23,525 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:23,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:23,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1486660373, now seen corresponding path program 2 times [2025-02-05 15:57:23,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:23,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516960103] [2025-02-05 15:57:23,526 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:23,535 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 351 statements into 2 equivalence classes. [2025-02-05 15:57:23,559 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 351 of 351 statements. [2025-02-05 15:57:23,559 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:23,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 105 proven. 737 refuted. 0 times theorem prover too weak. 2634 trivial. 0 not checked. [2025-02-05 15:57:23,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:23,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516960103] [2025-02-05 15:57:23,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516960103] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:23,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772747108] [2025-02-05 15:57:23,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:23,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:23,979 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:23,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:57:24,038 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 351 statements into 2 equivalence classes. [2025-02-05 15:57:24,093 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 351 of 351 statements. [2025-02-05 15:57:24,093 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:24,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:24,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:57:24,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 105 proven. 737 refuted. 0 times theorem prover too weak. 2634 trivial. 0 not checked. [2025-02-05 15:57:24,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 105 proven. 761 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2025-02-05 15:57:25,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772747108] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:25,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:25,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-02-05 15:57:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42670737] [2025-02-05 15:57:25,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:25,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:57:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:25,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:57:25,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:57:25,687 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-02-05 15:57:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:25,864 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-02-05 15:57:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:25,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 351 [2025-02-05 15:57:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:25,867 INFO L225 Difference]: With dead ends: 148 [2025-02-05 15:57:25,867 INFO L226 Difference]: Without dead ends: 144 [2025-02-05 15:57:25,867 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 692 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:57:25,868 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:25,868 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 188 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-02-05 15:57:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-02-05 15:57:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-02-05 15:57:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-02-05 15:57:25,886 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 351 [2025-02-05 15:57:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:25,886 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-02-05 15:57:25,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-02-05 15:57:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-02-05 15:57:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2025-02-05 15:57:25,889 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:25,889 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 29, 29, 25, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 11, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:25,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:26,090 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 [2025-02-05 15:57:26,090 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:26,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2058209874, now seen corresponding path program 3 times [2025-02-05 15:57:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:26,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375876710] [2025-02-05 15:57:26,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:26,110 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 417 statements into 24 equivalence classes. [2025-02-05 15:57:26,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 50 of 417 statements. [2025-02-05 15:57:26,115 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:57:26,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4983 backedges. 566 proven. 4 refuted. 0 times theorem prover too weak. 4413 trivial. 0 not checked. [2025-02-05 15:57:26,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:26,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375876710] [2025-02-05 15:57:26,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375876710] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:26,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394441744] [2025-02-05 15:57:26,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:26,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:26,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:26,175 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) [2025-02-05 15:57:26,176 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 [2025-02-05 15:57:26,254 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 417 statements into 24 equivalence classes. [2025-02-05 15:57:26,265 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 50 of 417 statements. [2025-02-05 15:57:26,265 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:57:26,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:26,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:26,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4983 backedges. 813 proven. 6 refuted. 0 times theorem prover too weak. 4164 trivial. 0 not checked. [2025-02-05 15:57:26,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4983 backedges. 671 proven. 12 refuted. 0 times theorem prover too weak. 4300 trivial. 0 not checked. [2025-02-05 15:57:27,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394441744] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:27,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:27,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-02-05 15:57:27,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78833066] [2025-02-05 15:57:27,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:27,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:57:27,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:27,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:57:27,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:57:27,298 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2025-02-05 15:57:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:27,410 INFO L93 Difference]: Finished difference Result 220 states and 380 transitions. [2025-02-05 15:57:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:57:27,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 417 [2025-02-05 15:57:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:27,412 INFO L225 Difference]: With dead ends: 220 [2025-02-05 15:57:27,412 INFO L226 Difference]: Without dead ends: 115 [2025-02-05 15:57:27,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 823 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:57:27,413 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:27,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 201 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-02-05 15:57:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2025-02-05 15:57:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 73 states have internal predecessors, (85), 19 states have call successors, (19), 10 states have call predecessors, (19), 16 states have return successors, (65), 26 states have call predecessors, (65), 19 states have call successors, (65) [2025-02-05 15:57:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 169 transitions. [2025-02-05 15:57:27,430 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 169 transitions. Word has length 417 [2025-02-05 15:57:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:27,430 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 169 transitions. [2025-02-05 15:57:27,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2025-02-05 15:57:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 169 transitions. [2025-02-05 15:57:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2025-02-05 15:57:27,438 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:27,438 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 39, 39, 36, 34, 23, 23, 23, 23, 23, 23, 23, 19, 19, 19, 19, 19, 19, 19, 17, 11, 10, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:27,444 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 [2025-02-05 15:57:27,642 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 [2025-02-05 15:57:27,642 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:27,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash 63406171, now seen corresponding path program 4 times [2025-02-05 15:57:27,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:27,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180611599] [2025-02-05 15:57:27,643 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:27,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:27,657 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 584 statements into 2 equivalence classes. [2025-02-05 15:57:27,693 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 496 of 584 statements. [2025-02-05 15:57:27,695 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:27,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 255 proven. 1037 refuted. 0 times theorem prover too weak. 8699 trivial. 0 not checked. [2025-02-05 15:57:27,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:27,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180611599] [2025-02-05 15:57:27,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180611599] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:27,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599382205] [2025-02-05 15:57:27,960 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:27,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:27,962 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) [2025-02-05 15:57:27,963 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 [2025-02-05 15:57:28,047 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 584 statements into 2 equivalence classes. [2025-02-05 15:57:28,115 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 496 of 584 statements. [2025-02-05 15:57:28,116 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:28,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:28,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:57:28,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 1918 proven. 19 refuted. 0 times theorem prover too weak. 8054 trivial. 0 not checked. [2025-02-05 15:57:28,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 255 proven. 1195 refuted. 0 times theorem prover too weak. 8541 trivial. 0 not checked. [2025-02-05 15:57:29,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599382205] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:29,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2025-02-05 15:57:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455418397] [2025-02-05 15:57:29,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:29,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:57:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:29,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:57:29,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:57:29,574 INFO L87 Difference]: Start difference. First operand 110 states and 169 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-02-05 15:57:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:29,712 INFO L93 Difference]: Finished difference Result 214 states and 356 transitions. [2025-02-05 15:57:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:57:29,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) Word has length 584 [2025-02-05 15:57:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:29,714 INFO L225 Difference]: With dead ends: 214 [2025-02-05 15:57:29,714 INFO L226 Difference]: Without dead ends: 110 [2025-02-05 15:57:29,715 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1183 GetRequests, 1157 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:29,715 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:29,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 213 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-02-05 15:57:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2025-02-05 15:57:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.125) internal successors, (81), 73 states have internal predecessors, (81), 18 states have call successors, (18), 9 states have call predecessors, (18), 17 states have return successors, (57), 25 states have call predecessors, (57), 18 states have call successors, (57) [2025-02-05 15:57:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2025-02-05 15:57:29,723 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 584 [2025-02-05 15:57:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:29,723 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2025-02-05 15:57:29,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-02-05 15:57:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2025-02-05 15:57:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2025-02-05 15:57:29,729 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:29,729 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 38, 38, 33, 30, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 14, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:29,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:29,929 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 [2025-02-05 15:57:29,929 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:29,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1000311849, now seen corresponding path program 5 times [2025-02-05 15:57:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:29,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186547736] [2025-02-05 15:57:29,930 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:57:29,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:29,944 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 541 statements into 33 equivalence classes. [2025-02-05 15:57:29,976 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 286 of 541 statements. [2025-02-05 15:57:29,976 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-05 15:57:29,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8499 backedges. 356 proven. 1225 refuted. 0 times theorem prover too weak. 6918 trivial. 0 not checked. [2025-02-05 15:57:30,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:30,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186547736] [2025-02-05 15:57:30,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186547736] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:30,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139310527] [2025-02-05 15:57:30,178 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:57:30,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:30,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:30,181 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) [2025-02-05 15:57:30,182 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 [2025-02-05 15:57:30,266 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 541 statements into 33 equivalence classes. [2025-02-05 15:57:30,317 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 286 of 541 statements. [2025-02-05 15:57:30,317 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-05 15:57:30,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:30,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:57:30,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8499 backedges. 3444 proven. 111 refuted. 0 times theorem prover too weak. 4944 trivial. 0 not checked. [2025-02-05 15:57:30,379 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8499 backedges. 355 proven. 1257 refuted. 0 times theorem prover too weak. 6887 trivial. 0 not checked. [2025-02-05 15:57:31,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139310527] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:31,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:31,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 20 [2025-02-05 15:57:31,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495371768] [2025-02-05 15:57:31,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:31,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:57:31,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:31,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:57:31,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:57:31,785 INFO L87 Difference]: Start difference. First operand 108 states and 156 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 13 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) [2025-02-05 15:57:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:32,112 INFO L93 Difference]: Finished difference Result 238 states and 427 transitions. [2025-02-05 15:57:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-05 15:57:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 13 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) Word has length 541 [2025-02-05 15:57:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:32,113 INFO L225 Difference]: With dead ends: 238 [2025-02-05 15:57:32,113 INFO L226 Difference]: Without dead ends: 120 [2025-02-05 15:57:32,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 1070 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 15:57:32,115 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:32,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 304 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:57:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-02-05 15:57:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2025-02-05 15:57:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 18 states have call successors, (18), 11 states have call predecessors, (18), 16 states have return successors, (56), 24 states have call predecessors, (56), 18 states have call successors, (56) [2025-02-05 15:57:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 156 transitions. [2025-02-05 15:57:32,138 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 156 transitions. Word has length 541 [2025-02-05 15:57:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:32,138 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 156 transitions. [2025-02-05 15:57:32,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 13 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) [2025-02-05 15:57:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 156 transitions. [2025-02-05 15:57:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2025-02-05 15:57:32,141 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:32,141 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 29, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:32,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:32,341 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 [2025-02-05 15:57:32,341 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:32,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1913663824, now seen corresponding path program 6 times [2025-02-05 15:57:32,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:32,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003726367] [2025-02-05 15:57:32,342 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:57:32,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:32,353 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 486 statements into 27 equivalence classes. [2025-02-05 15:57:32,381 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 241 of 486 statements. [2025-02-05 15:57:32,381 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 15:57:32,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 750 proven. 108 refuted. 0 times theorem prover too weak. 5955 trivial. 0 not checked. [2025-02-05 15:57:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003726367] [2025-02-05 15:57:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003726367] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442244456] [2025-02-05 15:57:32,526 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:57:32,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:32,528 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) [2025-02-05 15:57:32,530 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 [2025-02-05 15:57:32,626 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 486 statements into 27 equivalence classes. [2025-02-05 15:57:32,676 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 241 of 486 statements. [2025-02-05 15:57:32,677 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 15:57:32,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:32,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:57:32,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 771 proven. 111 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2025-02-05 15:57:32,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 775 proven. 117 refuted. 0 times theorem prover too weak. 5921 trivial. 0 not checked. [2025-02-05 15:57:33,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442244456] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:33,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:33,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2025-02-05 15:57:33,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140865104] [2025-02-05 15:57:33,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:33,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:57:33,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:33,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:57:33,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:57:33,961 INFO L87 Difference]: Start difference. First operand 109 states and 156 transitions. Second operand has 18 states, 16 states have (on average 3.875) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-05 15:57:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:34,099 INFO L93 Difference]: Finished difference Result 138 states and 224 transitions. [2025-02-05 15:57:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:34,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) Word has length 486 [2025-02-05 15:57:34,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:34,102 INFO L225 Difference]: With dead ends: 138 [2025-02-05 15:57:34,102 INFO L226 Difference]: Without dead ends: 134 [2025-02-05 15:57:34,102 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 962 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:57:34,103 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:34,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 135 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2025-02-05 15:57:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2025-02-05 15:57:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 81 states have internal predecessors, (91), 22 states have call successors, (22), 12 states have call predecessors, (22), 17 states have return successors, (80), 28 states have call predecessors, (80), 22 states have call successors, (80) [2025-02-05 15:57:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 193 transitions. [2025-02-05 15:57:34,114 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 193 transitions. Word has length 486 [2025-02-05 15:57:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:34,116 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 193 transitions. [2025-02-05 15:57:34,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-05 15:57:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 193 transitions. [2025-02-05 15:57:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2025-02-05 15:57:34,119 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:34,119 INFO L218 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 41, 38, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 16, 14, 12, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:34,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-05 15:57:34,319 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 [2025-02-05 15:57:34,320 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:34,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:34,320 INFO L85 PathProgramCache]: Analyzing trace with hash -241219287, now seen corresponding path program 7 times [2025-02-05 15:57:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:34,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27521228] [2025-02-05 15:57:34,320 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:57:34,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:34,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 677 statements into 1 equivalence classes. [2025-02-05 15:57:34,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 677 of 677 statements. [2025-02-05 15:57:34,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:34,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13431 backedges. 255 proven. 1760 refuted. 0 times theorem prover too weak. 11416 trivial. 0 not checked. [2025-02-05 15:57:34,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27521228] [2025-02-05 15:57:34,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27521228] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522142087] [2025-02-05 15:57:34,876 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:57:34,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:34,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:34,878 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) [2025-02-05 15:57:34,880 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 [2025-02-05 15:57:34,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 677 statements into 1 equivalence classes. [2025-02-05 15:57:35,092 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 677 of 677 statements. [2025-02-05 15:57:35,092 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:35,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:35,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 15:57:35,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13431 backedges. 255 proven. 1760 refuted. 0 times theorem prover too weak. 11416 trivial. 0 not checked. [2025-02-05 15:57:35,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13431 backedges. 255 proven. 1793 refuted. 0 times theorem prover too weak. 11383 trivial. 0 not checked. [2025-02-05 15:57:37,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522142087] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:37,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:37,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2025-02-05 15:57:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138688541] [2025-02-05 15:57:37,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:37,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:57:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:37,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:57:37,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:57:37,538 INFO L87 Difference]: Start difference. First operand 122 states and 193 transitions. Second operand has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2025-02-05 15:57:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:37,750 INFO L93 Difference]: Finished difference Result 171 states and 348 transitions. [2025-02-05 15:57:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 15:57:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 677 [2025-02-05 15:57:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:37,753 INFO L225 Difference]: With dead ends: 171 [2025-02-05 15:57:37,753 INFO L226 Difference]: Without dead ends: 167 [2025-02-05 15:57:37,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1378 GetRequests, 1343 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2025-02-05 15:57:37,754 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:37,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 216 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2025-02-05 15:57:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2025-02-05 15:57:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 97 states have internal predecessors, (107), 28 states have call successors, (28), 12 states have call predecessors, (28), 22 states have return successors, (141), 39 states have call predecessors, (141), 28 states have call successors, (141) [2025-02-05 15:57:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 276 transitions. [2025-02-05 15:57:37,787 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 276 transitions. Word has length 677 [2025-02-05 15:57:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:37,787 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 276 transitions. [2025-02-05 15:57:37,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2025-02-05 15:57:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 276 transitions. [2025-02-05 15:57:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2025-02-05 15:57:37,790 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:37,790 INFO L218 NwaCegarLoop]: trace histogram [48, 48, 41, 41, 37, 35, 24, 24, 24, 24, 24, 24, 24, 20, 20, 20, 20, 20, 20, 20, 15, 13, 13, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:37,798 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 [2025-02-05 15:57:37,995 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 [2025-02-05 15:57:37,995 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:37,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash -674916212, now seen corresponding path program 8 times [2025-02-05 15:57:37,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:37,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239719038] [2025-02-05 15:57:37,995 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:38,006 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 610 statements into 2 equivalence classes. [2025-02-05 15:57:38,042 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 610 of 610 statements. [2025-02-05 15:57:38,043 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:38,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10917 backedges. 724 proven. 1560 refuted. 0 times theorem prover too weak. 8633 trivial. 0 not checked. [2025-02-05 15:57:38,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:38,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239719038] [2025-02-05 15:57:38,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239719038] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:38,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404274533] [2025-02-05 15:57:38,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:38,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:38,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:38,584 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:38,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 15:57:38,714 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 610 statements into 2 equivalence classes. [2025-02-05 15:57:38,824 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 610 of 610 statements. [2025-02-05 15:57:38,824 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:38,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:38,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:57:38,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10917 backedges. 295 proven. 1701 refuted. 0 times theorem prover too weak. 8921 trivial. 0 not checked. [2025-02-05 15:57:38,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10917 backedges. 295 proven. 1745 refuted. 0 times theorem prover too weak. 8877 trivial. 0 not checked. [2025-02-05 15:57:41,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404274533] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:41,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:41,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 21] total 37 [2025-02-05 15:57:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111716630] [2025-02-05 15:57:41,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:41,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-05 15:57:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:41,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-05 15:57:41,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 15:57:41,791 INFO L87 Difference]: Start difference. First operand 149 states and 276 transitions. Second operand has 37 states, 35 states have (on average 3.4) internal successors, (119), 37 states have internal predecessors, (119), 31 states have call successors, (38), 1 states have call predecessors, (38), 18 states have return successors, (51), 21 states have call predecessors, (51), 31 states have call successors, (51) [2025-02-05 15:57:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:42,855 INFO L93 Difference]: Finished difference Result 396 states and 931 transitions. [2025-02-05 15:57:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-02-05 15:57:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 3.4) internal successors, (119), 37 states have internal predecessors, (119), 31 states have call successors, (38), 1 states have call predecessors, (38), 18 states have return successors, (51), 21 states have call predecessors, (51), 31 states have call successors, (51) Word has length 610 [2025-02-05 15:57:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:42,859 INFO L225 Difference]: With dead ends: 396 [2025-02-05 15:57:42,859 INFO L226 Difference]: Without dead ends: 236 [2025-02-05 15:57:42,862 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1197 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=886, Invalid=5594, Unknown=0, NotChecked=0, Total=6480 [2025-02-05 15:57:42,863 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 170 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:42,863 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 717 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 15:57:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2025-02-05 15:57:42,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 204. [2025-02-05 15:57:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 138 states have internal predecessors, (154), 39 states have call successors, (39), 26 states have call predecessors, (39), 23 states have return successors, (117), 39 states have call predecessors, (117), 39 states have call successors, (117) [2025-02-05 15:57:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 310 transitions. [2025-02-05 15:57:42,877 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 310 transitions. Word has length 610 [2025-02-05 15:57:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:42,877 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 310 transitions. [2025-02-05 15:57:42,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 3.4) internal successors, (119), 37 states have internal predecessors, (119), 31 states have call successors, (38), 1 states have call predecessors, (38), 18 states have return successors, (51), 21 states have call predecessors, (51), 31 states have call successors, (51) [2025-02-05 15:57:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 310 transitions. [2025-02-05 15:57:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1194 [2025-02-05 15:57:42,884 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:42,885 INFO L218 NwaCegarLoop]: trace histogram [98, 98, 77, 77, 71, 68, 49, 49, 49, 49, 49, 49, 49, 38, 38, 38, 38, 38, 38, 38, 30, 30, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:42,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 15:57:43,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 15:57:43,085 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:43,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash 677473161, now seen corresponding path program 9 times [2025-02-05 15:57:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:43,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143925450] [2025-02-05 15:57:43,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:43,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:43,103 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1193 statements into 73 equivalence classes. [2025-02-05 15:57:43,106 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 64 of 1193 statements. [2025-02-05 15:57:43,106 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:57:43,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 42995 backedges. 2223 proven. 15 refuted. 0 times theorem prover too weak. 40757 trivial. 0 not checked. [2025-02-05 15:57:43,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:43,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143925450] [2025-02-05 15:57:43,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143925450] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:43,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936024939] [2025-02-05 15:57:43,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:43,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:43,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:43,178 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:43,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 15:57:43,355 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1193 statements into 73 equivalence classes. [2025-02-05 15:57:43,370 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 64 of 1193 statements. [2025-02-05 15:57:43,370 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:57:43,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:43,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:57:43,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42995 backedges. 2567 proven. 21 refuted. 0 times theorem prover too weak. 40407 trivial. 0 not checked. [2025-02-05 15:57:43,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42995 backedges. 2567 proven. 21 refuted. 0 times theorem prover too weak. 40407 trivial. 0 not checked. [2025-02-05 15:57:45,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936024939] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:45,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:45,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2025-02-05 15:57:45,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396367192] [2025-02-05 15:57:45,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:45,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:57:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:45,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:57:45,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:57:45,746 INFO L87 Difference]: Start difference. First operand 204 states and 310 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-05 15:57:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:45,942 INFO L93 Difference]: Finished difference Result 409 states and 709 transitions. [2025-02-05 15:57:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:57:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 1193 [2025-02-05 15:57:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:45,945 INFO L225 Difference]: With dead ends: 409 [2025-02-05 15:57:45,945 INFO L226 Difference]: Without dead ends: 206 [2025-02-05 15:57:45,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2404 GetRequests, 2374 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:57:45,947 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:45,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 153 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2025-02-05 15:57:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2025-02-05 15:57:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 131 states have (on average 1.083969465648855) internal successors, (142), 127 states have internal predecessors, (142), 35 states have call successors, (35), 25 states have call predecessors, (35), 21 states have return successors, (102), 35 states have call predecessors, (102), 35 states have call successors, (102) [2025-02-05 15:57:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2025-02-05 15:57:45,968 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 1193 [2025-02-05 15:57:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:45,969 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2025-02-05 15:57:45,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-05 15:57:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2025-02-05 15:57:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1074 [2025-02-05 15:57:45,980 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:45,980 INFO L218 NwaCegarLoop]: trace histogram [86, 86, 71, 71, 64, 63, 43, 43, 43, 43, 43, 43, 43, 35, 35, 35, 35, 35, 35, 35, 28, 23, 21, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:45,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:46,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 15:57:46,185 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:46,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:46,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2012129286, now seen corresponding path program 10 times [2025-02-05 15:57:46,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:46,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50114231] [2025-02-05 15:57:46,186 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:46,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:46,212 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1073 statements into 2 equivalence classes. [2025-02-05 15:57:46,286 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 913 of 1073 statements. [2025-02-05 15:57:46,286 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:46,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34521 backedges. 609 proven. 2948 refuted. 0 times theorem prover too weak. 30964 trivial. 0 not checked. [2025-02-05 15:57:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50114231] [2025-02-05 15:57:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50114231] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662625422] [2025-02-05 15:57:46,809 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:46,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:46,811 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:46,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 15:57:46,983 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1073 statements into 2 equivalence classes. [2025-02-05 15:57:47,112 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 913 of 1073 statements. [2025-02-05 15:57:47,112 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:47,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:47,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:57:47,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34521 backedges. 6155 proven. 68 refuted. 0 times theorem prover too weak. 28298 trivial. 0 not checked. [2025-02-05 15:57:47,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34521 backedges. 612 proven. 3248 refuted. 0 times theorem prover too weak. 30661 trivial. 0 not checked. [2025-02-05 15:57:49,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662625422] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:49,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:49,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2025-02-05 15:57:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836335181] [2025-02-05 15:57:49,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:49,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:57:49,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:49,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:57:49,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:57:49,781 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2025-02-05 15:57:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:50,018 INFO L93 Difference]: Finished difference Result 375 states and 604 transitions. [2025-02-05 15:57:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:57:50,019 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) Word has length 1073 [2025-02-05 15:57:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:50,021 INFO L225 Difference]: With dead ends: 375 [2025-02-05 15:57:50,021 INFO L226 Difference]: Without dead ends: 198 [2025-02-05 15:57:50,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2170 GetRequests, 2132 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 15:57:50,023 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:50,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 306 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2025-02-05 15:57:50,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2025-02-05 15:57:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 132 states have (on average 1.0757575757575757) internal successors, (142), 128 states have internal predecessors, (142), 35 states have call successors, (35), 25 states have call predecessors, (35), 21 states have return successors, (99), 35 states have call predecessors, (99), 35 states have call successors, (99) [2025-02-05 15:57:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 276 transitions. [2025-02-05 15:57:50,034 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 276 transitions. Word has length 1073 [2025-02-05 15:57:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:50,035 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 276 transitions. [2025-02-05 15:57:50,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2025-02-05 15:57:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 276 transitions. [2025-02-05 15:57:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2014 [2025-02-05 15:57:50,051 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:50,051 INFO L218 NwaCegarLoop]: trace histogram [150, 150, 145, 145, 121, 118, 75, 75, 75, 75, 75, 75, 75, 72, 72, 72, 72, 72, 72, 72, 46, 46, 32, 24, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:50,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:50,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 15:57:50,255 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:50,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1824489705, now seen corresponding path program 11 times [2025-02-05 15:57:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997177330] [2025-02-05 15:57:50,256 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:57:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:50,283 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2013 statements into 132 equivalence classes. [2025-02-05 15:57:50,288 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 123 of 2013 statements. [2025-02-05 15:57:50,288 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-05 15:57:50,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 121947 backedges. 1405 proven. 4696 refuted. 0 times theorem prover too weak. 115846 trivial. 0 not checked. [2025-02-05 15:57:50,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:50,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997177330] [2025-02-05 15:57:50,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997177330] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:50,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464818231] [2025-02-05 15:57:50,363 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:57:50,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:50,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:50,366 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:50,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 15:57:50,609 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2013 statements into 132 equivalence classes. [2025-02-05 15:57:50,629 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 123 of 2013 statements. [2025-02-05 15:57:50,629 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-05 15:57:50,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:50,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:57:50,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 121947 backedges. 28415 proven. 31 refuted. 0 times theorem prover too weak. 93501 trivial. 0 not checked. [2025-02-05 15:57:50,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 121947 backedges. 1405 proven. 4696 refuted. 0 times theorem prover too weak. 115846 trivial. 0 not checked. [2025-02-05 15:57:54,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464818231] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:54,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:54,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2025-02-05 15:57:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564330603] [2025-02-05 15:57:54,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:54,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 15:57:54,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:54,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 15:57:54,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:57:54,755 INFO L87 Difference]: Start difference. First operand 189 states and 276 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (24), 9 states have call predecessors, (24), 7 states have call successors, (24) [2025-02-05 15:57:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:54,910 INFO L93 Difference]: Finished difference Result 369 states and 592 transitions. [2025-02-05 15:57:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 15:57:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (24), 9 states have call predecessors, (24), 7 states have call successors, (24) Word has length 2013 [2025-02-05 15:57:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:54,912 INFO L225 Difference]: With dead ends: 369 [2025-02-05 15:57:54,912 INFO L226 Difference]: Without dead ends: 186 [2025-02-05 15:57:54,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4045 GetRequests, 4017 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:57:54,913 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:54,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 209 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2025-02-05 15:57:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2025-02-05 15:57:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 126 states have internal predecessors, (140), 35 states have call successors, (35), 25 states have call predecessors, (35), 20 states have return successors, (89), 33 states have call predecessors, (89), 35 states have call successors, (89) [2025-02-05 15:57:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 264 transitions. [2025-02-05 15:57:54,924 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 264 transitions. Word has length 2013 [2025-02-05 15:57:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:54,925 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 264 transitions. [2025-02-05 15:57:54,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (24), 9 states have call predecessors, (24), 7 states have call successors, (24) [2025-02-05 15:57:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 264 transitions. [2025-02-05 15:57:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1333 [2025-02-05 15:57:54,932 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:54,933 INFO L218 NwaCegarLoop]: trace histogram [103, 103, 92, 92, 81, 77, 51, 51, 51, 51, 51, 51, 51, 46, 46, 46, 46, 46, 46, 46, 35, 26, 22, 15, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:54,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-05 15:57:55,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:55,134 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:55,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:55,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2017491334, now seen corresponding path program 12 times [2025-02-05 15:57:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:55,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760533300] [2025-02-05 15:57:55,135 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:57:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:55,154 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1332 statements into 86 equivalence classes. [2025-02-05 15:57:55,245 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 426 of 1332 statements. [2025-02-05 15:57:55,245 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:57:55,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 53162 backedges. 1235 proven. 3884 refuted. 0 times theorem prover too weak. 48043 trivial. 0 not checked. [2025-02-05 15:57:55,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760533300] [2025-02-05 15:57:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760533300] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148498352] [2025-02-05 15:57:55,625 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:57:55,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:55,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:55,627 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:55,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 15:57:55,840 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1332 statements into 86 equivalence classes. [2025-02-05 15:57:55,937 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 426 of 1332 statements. [2025-02-05 15:57:55,938 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:57:55,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:55,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 15:57:55,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 53162 backedges. 1238 proven. 3937 refuted. 0 times theorem prover too weak. 47987 trivial. 0 not checked. [2025-02-05 15:57:56,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 53162 backedges. 1242 proven. 3989 refuted. 0 times theorem prover too weak. 47931 trivial. 0 not checked. [2025-02-05 15:58:00,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148498352] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:00,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:00,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-02-05 15:58:00,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743294369] [2025-02-05 15:58:00,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:00,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-05 15:58:00,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:00,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-05 15:58:00,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2025-02-05 15:58:00,774 INFO L87 Difference]: Start difference. First operand 185 states and 264 transitions. Second operand has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 28 states have internal predecessors, (94), 23 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) [2025-02-05 15:58:01,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:01,053 INFO L93 Difference]: Finished difference Result 235 states and 382 transitions. [2025-02-05 15:58:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:58:01,053 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 28 states have internal predecessors, (94), 23 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) Word has length 1332 [2025-02-05 15:58:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:01,057 INFO L225 Difference]: With dead ends: 235 [2025-02-05 15:58:01,057 INFO L226 Difference]: Without dead ends: 231 [2025-02-05 15:58:01,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2695 GetRequests, 2649 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 15:58:01,058 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:01,059 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 239 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2025-02-05 15:58:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 214. [2025-02-05 15:58:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 148 states have (on average 1.0743243243243243) internal successors, (159), 145 states have internal predecessors, (159), 42 states have call successors, (42), 28 states have call predecessors, (42), 23 states have return successors, (136), 40 states have call predecessors, (136), 42 states have call successors, (136) [2025-02-05 15:58:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 337 transitions. [2025-02-05 15:58:01,075 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 337 transitions. Word has length 1332 [2025-02-05 15:58:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:01,076 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 337 transitions. [2025-02-05 15:58:01,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 28 states have internal predecessors, (94), 23 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) [2025-02-05 15:58:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 337 transitions. [2025-02-05 15:58:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4628 [2025-02-05 15:58:01,207 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:01,209 INFO L218 NwaCegarLoop]: trace histogram [341, 341, 338, 338, 275, 274, 170, 170, 170, 170, 170, 170, 170, 169, 169, 169, 169, 169, 169, 169, 106, 104, 66, 64, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:01,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:01,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:01,414 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:01,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash 201344547, now seen corresponding path program 13 times [2025-02-05 15:58:01,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:01,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706202746] [2025-02-05 15:58:01,415 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:01,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:01,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4627 statements into 1 equivalence classes. [2025-02-05 15:58:02,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4627 of 4627 statements. [2025-02-05 15:58:02,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:02,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 649012 backedges. 2058 proven. 20517 refuted. 0 times theorem prover too weak. 626437 trivial. 0 not checked. [2025-02-05 15:58:15,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:15,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706202746] [2025-02-05 15:58:15,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706202746] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:15,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509839661] [2025-02-05 15:58:15,170 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:15,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:15,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:15,172 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:15,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 15:58:15,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4627 statements into 1 equivalence classes. [2025-02-05 15:58:16,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4627 of 4627 statements. [2025-02-05 15:58:16,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:16,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:16,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 10293 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 15:58:16,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 649012 backedges. 2058 proven. 20517 refuted. 0 times theorem prover too weak. 626437 trivial. 0 not checked. [2025-02-05 15:58:16,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 649012 backedges. 2058 proven. 20602 refuted. 0 times theorem prover too weak. 626352 trivial. 0 not checked. [2025-02-05 15:58:30,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509839661] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:30,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:30,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 27] total 30 [2025-02-05 15:58:30,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408666801] [2025-02-05 15:58:30,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:30,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 15:58:30,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:30,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 15:58:30,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2025-02-05 15:58:30,199 INFO L87 Difference]: Start difference. First operand 214 states and 337 transitions. Second operand has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) [2025-02-05 15:58:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:30,443 INFO L93 Difference]: Finished difference Result 258 states and 469 transitions. [2025-02-05 15:58:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 15:58:30,443 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) Word has length 4627 [2025-02-05 15:58:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:30,449 INFO L225 Difference]: With dead ends: 258 [2025-02-05 15:58:30,449 INFO L226 Difference]: Without dead ends: 254 [2025-02-05 15:58:30,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9290 GetRequests, 9239 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 15:58:30,451 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 96 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:30,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 253 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2025-02-05 15:58:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 246. [2025-02-05 15:58:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 167 states have (on average 1.0658682634730539) internal successors, (178), 164 states have internal predecessors, (178), 49 states have call successors, (49), 28 states have call predecessors, (49), 29 states have return successors, (209), 53 states have call predecessors, (209), 49 states have call successors, (209) [2025-02-05 15:58:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 436 transitions. [2025-02-05 15:58:30,468 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 436 transitions. Word has length 4627 [2025-02-05 15:58:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:30,469 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 436 transitions. [2025-02-05 15:58:30,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) [2025-02-05 15:58:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 436 transitions. [2025-02-05 15:58:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4614 [2025-02-05 15:58:30,579 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:30,580 INFO L218 NwaCegarLoop]: trace histogram [341, 341, 336, 336, 276, 271, 170, 170, 170, 170, 170, 170, 170, 168, 168, 168, 168, 168, 168, 168, 108, 101, 65, 65, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:30,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:30,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:30,780 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:30,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash -202946184, now seen corresponding path program 14 times [2025-02-05 15:58:30,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:30,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440425618] [2025-02-05 15:58:30,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:30,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:30,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 4613 statements into 2 equivalence classes. [2025-02-05 15:58:31,787 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 4613 of 4613 statements. [2025-02-05 15:58:31,787 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:31,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat