./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 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_25-2.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 a9cccea737f311e9e2585bb4c0fd7fa7e4382857df72468b846279ab5798480b --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 04:06:18,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 04:06:18,096 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 04:06:18,101 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 04:06:18,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 04:06:18,121 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 04:06:18,122 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 04:06:18,122 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 04:06:18,125 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 04:06:18,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 04:06:18,126 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 04:06:18,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 04:06:18,126 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 04:06:18,127 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:06:18,127 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:06:18,127 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 04:06:18,127 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 04:06:18,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 04:06:18,128 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 -> a9cccea737f311e9e2585bb4c0fd7fa7e4382857df72468b846279ab5798480b [2025-01-09 04:06:18,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 04:06:18,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 04:06:18,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 04:06:18,352 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 04:06:18,353 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 04:06:18,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c [2025-01-09 04:06:19,519 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/169ad3dc7/940b7dd6e2324b3e9569d6d1bff871a2/FLAG5a1cf7a08 [2025-01-09 04:06:19,718 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 04:06:19,722 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c [2025-01-09 04:06:19,727 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/169ad3dc7/940b7dd6e2324b3e9569d6d1bff871a2/FLAG5a1cf7a08 [2025-01-09 04:06:20,086 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/169ad3dc7/940b7dd6e2324b3e9569d6d1bff871a2 [2025-01-09 04:06:20,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 04:06:20,088 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 04:06:20,089 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 04:06:20,089 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 04:06:20,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 04:06:20,092 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2523bb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20, skipping insertion in model container [2025-01-09 04:06:20,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,103 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 04:06:20,188 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_25-2.c[952,965] [2025-01-09 04:06:20,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:06:20,200 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 04:06:20,208 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_25-2.c[952,965] [2025-01-09 04:06:20,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:06:20,216 INFO L204 MainTranslator]: Completed translation [2025-01-09 04:06:20,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20 WrapperNode [2025-01-09 04:06:20,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 04:06:20,218 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 04:06:20,218 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 04:06:20,218 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 04:06:20,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,224 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,232 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-01-09 04:06:20,232 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 04:06:20,232 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 04:06:20,232 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 04:06:20,233 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 04:06:20,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,238 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,245 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]. [2025-01-09 04:06:20,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,247 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,247 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,248 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,248 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,250 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 04:06:20,250 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 04:06:20,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 04:06:20,250 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 04:06:20,251 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (1/1) ... [2025-01-09 04:06:20,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:06:20,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:20,271 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) [2025-01-09 04:06:20,273 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 [2025-01-09 04:06:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 04:06:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 04:06:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-01-09 04:06:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-01-09 04:06:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-01-09 04:06:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-01-09 04:06:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 04:06:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 04:06:20,323 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 04:06:20,325 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 04:06:20,399 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-01-09 04:06:20,399 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 04:06:20,408 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 04:06:20,408 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 04:06:20,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:06:20 BoogieIcfgContainer [2025-01-09 04:06:20,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 04:06:20,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 04:06:20,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 04:06:20,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 04:06:20,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:06:20" (1/3) ... [2025-01-09 04:06:20,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6e7bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:06:20, skipping insertion in model container [2025-01-09 04:06:20,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:06:20" (2/3) ... [2025-01-09 04:06:20,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6e7bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:06:20, skipping insertion in model container [2025-01-09 04:06:20,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:06:20" (3/3) ... [2025-01-09 04:06:20,417 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-2.c [2025-01-09 04:06:20,427 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 04:06:20,428 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_25-2.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-01-09 04:06:20,467 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 04:06:20,475 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;@665a41db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 04:06:20,475 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 04:06:20,477 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) [2025-01-09 04:06:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-09 04:06:20,481 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:20,481 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:20,482 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:20,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2025-01-09 04:06:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:20,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324841947] [2025-01-09 04:06:20,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:20,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:20,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 04:06:20,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 04:06:20,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:20,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:06:20,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:20,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324841947] [2025-01-09 04:06:20,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324841947] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:06:20,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:06:20,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 04:06:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168680635] [2025-01-09 04:06:20,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:06:20,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 04:06:20,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:20,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 04:06:20,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 04:06:20,686 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, 4 states have (on average 2.0) internal successors, (8), 5 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) [2025-01-09 04:06:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:20,762 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2025-01-09 04:06:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 04:06:20,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2025-01-09 04:06:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:20,769 INFO L225 Difference]: With dead ends: 41 [2025-01-09 04:06:20,770 INFO L226 Difference]: Without dead ends: 29 [2025-01-09 04:06:20,772 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 [2025-01-09 04:06:20,775 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:20,776 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-01-09 04:06:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-01-09 04:06:20,801 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) [2025-01-09 04:06:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-01-09 04:06:20,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-01-09 04:06:20,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:20,805 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-01-09 04:06:20,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2025-01-09 04:06:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-01-09 04:06:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 04:06:20,807 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:20,808 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:20,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 04:06:20,808 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:20,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:20,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2025-01-09 04:06:20,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565111713] [2025-01-09 04:06:20,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:20,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 04:06:20,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 04:06:20,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:20,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:06:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:20,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565111713] [2025-01-09 04:06:20,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565111713] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:06:20,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:06:20,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 04:06:20,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948253186] [2025-01-09 04:06:20,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:06:20,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 04:06:20,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:20,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 04:06:20,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 04:06:20,887 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:06:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:20,940 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-01-09 04:06:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 04:06:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-01-09 04:06:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:20,942 INFO L225 Difference]: With dead ends: 33 [2025-01-09 04:06:20,942 INFO L226 Difference]: Without dead ends: 29 [2025-01-09 04:06:20,942 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 [2025-01-09 04:06:20,943 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:20,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 04:06:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-01-09 04:06:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-01-09 04:06:20,950 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) [2025-01-09 04:06:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-01-09 04:06:20,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-01-09 04:06:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:20,952 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-01-09 04:06:20,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:06:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-01-09 04:06:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-01-09 04:06:20,953 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:20,953 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] [2025-01-09 04:06:20,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 04:06:20,954 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:20,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2025-01-09 04:06:20,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:20,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505066267] [2025-01-09 04:06:20,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:20,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:20,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 04:06:20,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 04:06:20,974 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:20,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:06:21,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:21,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505066267] [2025-01-09 04:06:21,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505066267] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:21,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923325271] [2025-01-09 04:06:21,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:21,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:21,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:21,079 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) [2025-01-09 04:06:21,081 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 [2025-01-09 04:06:21,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 04:06:21,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 04:06:21,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:21,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:21,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 04:06:21,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:06:21,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:06:21,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923325271] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:21,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:21,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-01-09 04:06:21,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387761997] [2025-01-09 04:06:21,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:21,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 04:06:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:21,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 04:06:21,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-01-09 04:06:21,370 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) [2025-01-09 04:06:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:21,485 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-01-09 04:06:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 04:06:21,485 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 [2025-01-09 04:06:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:21,486 INFO L225 Difference]: With dead ends: 55 [2025-01-09 04:06:21,486 INFO L226 Difference]: Without dead ends: 31 [2025-01-09 04:06:21,486 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 [2025-01-09 04:06:21,487 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:21,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-01-09 04:06:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-01-09 04:06:21,490 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) [2025-01-09 04:06:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-01-09 04:06:21,491 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-01-09 04:06:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:21,491 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-01-09 04:06:21,492 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) [2025-01-09 04:06:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-01-09 04:06:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-09 04:06:21,492 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:21,492 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] [2025-01-09 04:06:21,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 04:06:21,697 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 [2025-01-09 04:06:21,697 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:21,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2025-01-09 04:06:21,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:21,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766573978] [2025-01-09 04:06:21,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:21,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:21,701 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 04:06:21,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 04:06:21,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:21,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:06:21,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:21,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766573978] [2025-01-09 04:06:21,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766573978] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:21,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805413012] [2025-01-09 04:06:21,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:21,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:21,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:21,780 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) [2025-01-09 04:06:21,781 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 [2025-01-09 04:06:21,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 04:06:21,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 04:06:21,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:21,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:21,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 04:06:21,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:06:21,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:06:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805413012] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:21,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:21,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-01-09 04:06:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198559977] [2025-01-09 04:06:21,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:21,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 04:06:21,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:21,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 04:06:21,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-01-09 04:06:21,989 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) [2025-01-09 04:06:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:22,074 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-01-09 04:06:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:06:22,074 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 [2025-01-09 04:06:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:22,075 INFO L225 Difference]: With dead ends: 40 [2025-01-09 04:06:22,075 INFO L226 Difference]: Without dead ends: 36 [2025-01-09 04:06:22,075 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 [2025-01-09 04:06:22,075 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:22,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-01-09 04:06:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-01-09 04:06:22,081 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) [2025-01-09 04:06:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-01-09 04:06:22,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-01-09 04:06:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:22,082 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-01-09 04:06:22,082 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) [2025-01-09 04:06:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-01-09 04:06:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-01-09 04:06:22,083 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:22,083 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] [2025-01-09 04:06:22,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 04:06:22,288 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 [2025-01-09 04:06:22,288 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:22,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:22,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2025-01-09 04:06:22,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:22,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487905323] [2025-01-09 04:06:22,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:22,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-01-09 04:06:22,298 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-01-09 04:06:22,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:22,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 04:06:22,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487905323] [2025-01-09 04:06:22,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487905323] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190352515] [2025-01-09 04:06:22,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:22,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:22,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:22,380 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) [2025-01-09 04:06:22,382 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 [2025-01-09 04:06:22,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-01-09 04:06:22,424 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-01-09 04:06:22,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:22,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:22,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 04:06:22,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-09 04:06:22,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:06:22,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190352515] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:22,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:22,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-01-09 04:06:22,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382510198] [2025-01-09 04:06:22,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:22,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 04:06:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:22,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 04:06:22,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-01-09 04:06:22,755 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) [2025-01-09 04:06:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:22,890 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-01-09 04:06:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 04:06:22,890 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 [2025-01-09 04:06:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:22,891 INFO L225 Difference]: With dead ends: 69 [2025-01-09 04:06:22,891 INFO L226 Difference]: Without dead ends: 38 [2025-01-09 04:06:22,891 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 [2025-01-09 04:06:22,892 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:22,892 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-01-09 04:06:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-01-09 04:06:22,899 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) [2025-01-09 04:06:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-01-09 04:06:22,900 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-01-09 04:06:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:22,900 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-01-09 04:06:22,900 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) [2025-01-09 04:06:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-01-09 04:06:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-09 04:06:22,902 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:22,902 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] [2025-01-09 04:06:22,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 04:06:23,107 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 [2025-01-09 04:06:23,107 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:23,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2025-01-09 04:06:23,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:23,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513841395] [2025-01-09 04:06:23,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:23,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:23,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 04:06:23,118 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 04:06:23,118 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:23,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 04:06:23,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513841395] [2025-01-09 04:06:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513841395] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293535680] [2025-01-09 04:06:23,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:23,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:23,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:23,214 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) [2025-01-09 04:06:23,216 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 [2025-01-09 04:06:23,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 04:06:23,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 04:06:23,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:23,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:23,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 04:06:23,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 04:06:23,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:06:23,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293535680] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:23,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:23,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-01-09 04:06:23,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301574867] [2025-01-09 04:06:23,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:23,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 04:06:23,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:23,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 04:06:23,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-01-09 04:06:23,590 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) [2025-01-09 04:06:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:23,891 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-01-09 04:06:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 04:06:23,892 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 [2025-01-09 04:06:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:23,893 INFO L225 Difference]: With dead ends: 101 [2025-01-09 04:06:23,893 INFO L226 Difference]: Without dead ends: 68 [2025-01-09 04:06:23,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-01-09 04:06:23,894 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:23,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:06:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-01-09 04:06:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-01-09 04:06:23,900 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) [2025-01-09 04:06:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-01-09 04:06:23,901 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-01-09 04:06:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:23,901 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-01-09 04:06:23,902 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) [2025-01-09 04:06:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-01-09 04:06:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-09 04:06:23,903 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:23,903 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] [2025-01-09 04:06:23,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 04:06:24,103 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 [2025-01-09 04:06:24,103 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:24,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2025-01-09 04:06:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:24,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190762591] [2025-01-09 04:06:24,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:24,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-09 04:06:24,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-09 04:06:24,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:24,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-01-09 04:06:24,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:24,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190762591] [2025-01-09 04:06:24,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190762591] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:24,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556705691] [2025-01-09 04:06:24,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:24,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:24,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:24,178 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) [2025-01-09 04:06:24,180 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 [2025-01-09 04:06:24,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-09 04:06:24,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-09 04:06:24,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:24,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:24,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 04:06:24,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-01-09 04:06:24,268 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 04:06:24,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556705691] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:24,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:24,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-01-09 04:06:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935238370] [2025-01-09 04:06:24,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:24,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 04:06:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:24,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 04:06:24,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-01-09 04:06:24,655 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) [2025-01-09 04:06:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:24,809 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-01-09 04:06:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 04:06:24,809 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 [2025-01-09 04:06:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:24,811 INFO L225 Difference]: With dead ends: 102 [2025-01-09 04:06:24,811 INFO L226 Difference]: Without dead ends: 98 [2025-01-09 04:06:24,811 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 [2025-01-09 04:06:24,812 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:24,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 164 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-01-09 04:06:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-01-09 04:06:24,828 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) [2025-01-09 04:06:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-01-09 04:06:24,829 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-01-09 04:06:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:24,830 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-01-09 04:06:24,830 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) [2025-01-09 04:06:24,830 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-01-09 04:06:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-01-09 04:06:24,832 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:24,832 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:24,840 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 [2025-01-09 04:06:25,032 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 [2025-01-09 04:06:25,033 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:25,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:25,033 INFO L85 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2025-01-09 04:06:25,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:25,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038487654] [2025-01-09 04:06:25,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:25,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:25,038 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-01-09 04:06:25,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-01-09 04:06:25,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:25,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-01-09 04:06:25,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:25,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038487654] [2025-01-09 04:06:25,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038487654] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:25,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944435424] [2025-01-09 04:06:25,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:06:25,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:25,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:25,161 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) [2025-01-09 04:06:25,162 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 [2025-01-09 04:06:25,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-01-09 04:06:25,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-01-09 04:06:25,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:25,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:25,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 04:06:25,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-01-09 04:06:25,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-01-09 04:06:25,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944435424] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:25,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:25,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-01-09 04:06:25,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199341711] [2025-01-09 04:06:25,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:25,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 04:06:25,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:25,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 04:06:25,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-01-09 04:06:25,905 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-01-09 04:06:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:26,373 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-01-09 04:06:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-09 04:06:26,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 93 [2025-01-09 04:06:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:26,376 INFO L225 Difference]: With dead ends: 177 [2025-01-09 04:06:26,376 INFO L226 Difference]: Without dead ends: 104 [2025-01-09 04:06:26,379 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-01-09 04:06:26,379 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:26,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 325 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 04:06:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-01-09 04:06:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-01-09 04:06:26,396 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) [2025-01-09 04:06:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-01-09 04:06:26,397 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 93 [2025-01-09 04:06:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:26,400 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-01-09 04:06:26,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-01-09 04:06:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-01-09 04:06:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2025-01-09 04:06:26,405 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:26,405 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 10, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:26,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 04:06:26,606 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 [2025-01-09 04:06:26,606 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:26,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash 437944761, now seen corresponding path program 2 times [2025-01-09 04:06:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:26,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47688566] [2025-01-09 04:06:26,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:06:26,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:26,614 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 159 statements into 2 equivalence classes. [2025-01-09 04:06:26,630 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 159 of 159 statements. [2025-01-09 04:06:26,630 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:06:26,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 43 proven. 179 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2025-01-09 04:06:26,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47688566] [2025-01-09 04:06:26,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47688566] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624084544] [2025-01-09 04:06:26,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:06:26,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:26,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:26,792 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) [2025-01-09 04:06:26,793 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 [2025-01-09 04:06:26,831 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 159 statements into 2 equivalence classes. [2025-01-09 04:06:26,858 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 159 of 159 statements. [2025-01-09 04:06:26,858 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:06:26,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:26,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 04:06:26,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 244 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2025-01-09 04:06:26,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 260 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2025-01-09 04:06:27,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624084544] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:27,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:27,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-01-09 04:06:27,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965024270] [2025-01-09 04:06:27,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:27,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 04:06:27,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:27,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 04:06:27,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-01-09 04:06:27,974 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 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) [2025-01-09 04:06:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:28,182 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-01-09 04:06:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 04:06:28,183 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 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 159 [2025-01-09 04:06:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:28,184 INFO L225 Difference]: With dead ends: 132 [2025-01-09 04:06:28,184 INFO L226 Difference]: Without dead ends: 128 [2025-01-09 04:06:28,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 302 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-01-09 04:06:28,185 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:28,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 196 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-01-09 04:06:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-01-09 04:06:28,195 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) [2025-01-09 04:06:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-01-09 04:06:28,197 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 159 [2025-01-09 04:06:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:28,197 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-01-09 04:06:28,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 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) [2025-01-09 04:06:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-01-09 04:06:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2025-01-09 04:06:28,200 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:28,200 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 18, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:28,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 04:06:28,404 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 [2025-01-09 04:06:28,404 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:28,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:28,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2025-01-09 04:06:28,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:28,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296557747] [2025-01-09 04:06:28,405 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:06:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:28,412 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 284 statements into 2 equivalence classes. [2025-01-09 04:06:28,463 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 284 of 284 statements. [2025-01-09 04:06:28,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:06:28,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2025-01-09 04:06:28,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:28,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296557747] [2025-01-09 04:06:28,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296557747] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:28,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418729536] [2025-01-09 04:06:28,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:06:28,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:28,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:28,780 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) [2025-01-09 04:06:28,781 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 [2025-01-09 04:06:28,836 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 284 statements into 2 equivalence classes. [2025-01-09 04:06:28,883 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 284 of 284 statements. [2025-01-09 04:06:28,883 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:06:28,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:28,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 04:06:28,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2025-01-09 04:06:28,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2025-01-09 04:06:30,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418729536] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:30,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:30,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2025-01-09 04:06:30,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515795425] [2025-01-09 04:06:30,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:30,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-09 04:06:30,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:30,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-09 04:06:30,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2025-01-09 04:06:30,412 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2025-01-09 04:06:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:31,076 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2025-01-09 04:06:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-01-09 04:06:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) Word has length 284 [2025-01-09 04:06:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:31,079 INFO L225 Difference]: With dead ends: 323 [2025-01-09 04:06:31,079 INFO L226 Difference]: Without dead ends: 214 [2025-01-09 04:06:31,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2025-01-09 04:06:31,081 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 158 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:31,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 449 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 04:06:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2025-01-09 04:06:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2025-01-09 04:06:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 35 states have call successors, (35), 17 states have call predecessors, (35), 25 states have return successors, (120), 43 states have call predecessors, (120), 35 states have call successors, (120) [2025-01-09 04:06:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2025-01-09 04:06:31,106 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2025-01-09 04:06:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:31,106 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2025-01-09 04:06:31,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2025-01-09 04:06:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2025-01-09 04:06:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2025-01-09 04:06:31,113 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:31,113 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 25, 25, 24, 19, 16, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:31,119 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 [2025-01-09 04:06:31,313 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 [2025-01-09 04:06:31,313 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:31,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:31,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1695767594, now seen corresponding path program 3 times [2025-01-09 04:06:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:31,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945521965] [2025-01-09 04:06:31,315 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:06:31,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:31,324 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 389 statements into 22 equivalence classes. [2025-01-09 04:06:31,330 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 50 of 389 statements. [2025-01-09 04:06:31,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 04:06:31,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 515 proven. 4 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2025-01-09 04:06:31,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:31,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945521965] [2025-01-09 04:06:31,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945521965] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:31,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128149045] [2025-01-09 04:06:31,414 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:06:31,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:31,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:31,415 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) [2025-01-09 04:06:31,417 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 [2025-01-09 04:06:31,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 389 statements into 22 equivalence classes. [2025-01-09 04:06:31,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 50 of 389 statements. [2025-01-09 04:06:31,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 04:06:31,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:31,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 04:06:31,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 760 proven. 6 refuted. 0 times theorem prover too weak. 3609 trivial. 0 not checked. [2025-01-09 04:06:31,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 619 proven. 12 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2025-01-09 04:06:32,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128149045] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:32,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-01-09 04:06:32,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273693532] [2025-01-09 04:06:32,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:32,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 04:06:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:32,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 04:06:32,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-01-09 04:06:32,364 INFO L87 Difference]: Start difference. First operand 184 states and 301 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) [2025-01-09 04:06:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:32,461 INFO L93 Difference]: Finished difference Result 360 states and 621 transitions. [2025-01-09 04:06:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 04:06:32,463 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 389 [2025-01-09 04:06:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:32,464 INFO L225 Difference]: With dead ends: 360 [2025-01-09 04:06:32,464 INFO L226 Difference]: Without dead ends: 181 [2025-01-09 04:06:32,465 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 767 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-01-09 04:06:32,466 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:32,467 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 152 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2025-01-09 04:06:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2025-01-09 04:06:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 116 states have internal predecessors, (138), 33 states have call successors, (33), 18 states have call predecessors, (33), 22 states have return successors, (95), 39 states have call predecessors, (95), 33 states have call successors, (95) [2025-01-09 04:06:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 266 transitions. [2025-01-09 04:06:32,483 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 266 transitions. Word has length 389 [2025-01-09 04:06:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:32,483 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 266 transitions. [2025-01-09 04:06:32,484 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) [2025-01-09 04:06:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 266 transitions. [2025-01-09 04:06:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2025-01-09 04:06:32,488 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:32,488 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 29, 29, 28, 27, 19, 19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:32,495 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 [2025-01-09 04:06:32,688 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 [2025-01-09 04:06:32,689 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:32,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1299493047, now seen corresponding path program 4 times [2025-01-09 04:06:32,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:32,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104540431] [2025-01-09 04:06:32,689 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:06:32,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:32,703 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 461 statements into 2 equivalence classes. [2025-01-09 04:06:32,732 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 391 of 461 statements. [2025-01-09 04:06:32,732 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 04:06:32,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 196 proven. 801 refuted. 0 times theorem prover too weak. 5216 trivial. 0 not checked. [2025-01-09 04:06:32,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104540431] [2025-01-09 04:06:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104540431] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602081014] [2025-01-09 04:06:32,958 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:06:32,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:32,961 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) [2025-01-09 04:06:32,962 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 [2025-01-09 04:06:33,040 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 461 statements into 2 equivalence classes. [2025-01-09 04:06:33,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 391 of 461 statements. [2025-01-09 04:06:33,096 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 04:06:33,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:33,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 04:06:33,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 1477 proven. 19 refuted. 0 times theorem prover too weak. 4717 trivial. 0 not checked. [2025-01-09 04:06:33,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 196 proven. 927 refuted. 0 times theorem prover too weak. 5090 trivial. 0 not checked. [2025-01-09 04:06:34,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602081014] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:34,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:34,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2025-01-09 04:06:34,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342205217] [2025-01-09 04:06:34,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:34,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 04:06:34,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:34,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 04:06:34,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-01-09 04:06:34,359 INFO L87 Difference]: Start difference. First operand 174 states and 266 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) [2025-01-09 04:06:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:34,475 INFO L93 Difference]: Finished difference Result 327 states and 532 transitions. [2025-01-09 04:06:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 04:06:34,476 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 461 [2025-01-09 04:06:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:34,477 INFO L225 Difference]: With dead ends: 327 [2025-01-09 04:06:34,477 INFO L226 Difference]: Without dead ends: 139 [2025-01-09 04:06:34,478 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 911 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-01-09 04:06:34,479 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:34,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-01-09 04:06:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2025-01-09 04:06:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 95 states have internal predecessors, (112), 24 states have call successors, (24), 16 states have call predecessors, (24), 18 states have return successors, (67), 27 states have call predecessors, (67), 24 states have call successors, (67) [2025-01-09 04:06:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 203 transitions. [2025-01-09 04:06:34,491 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 203 transitions. Word has length 461 [2025-01-09 04:06:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:34,491 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 203 transitions. [2025-01-09 04:06:34,491 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) [2025-01-09 04:06:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 203 transitions. [2025-01-09 04:06:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2025-01-09 04:06:34,495 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:34,495 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 31, 31, 28, 28, 19, 19, 19, 19, 19, 19, 19, 15, 15, 15, 15, 15, 15, 15, 13, 10, 9, 3, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:34,501 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 [2025-01-09 04:06:34,695 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 [2025-01-09 04:06:34,695 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:34,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1622557946, now seen corresponding path program 5 times [2025-01-09 04:06:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:34,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001353732] [2025-01-09 04:06:34,696 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 04:06:34,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:34,711 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 474 statements into 31 equivalence classes. [2025-01-09 04:06:34,715 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 67 of 474 statements. [2025-01-09 04:06:34,716 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-09 04:06:34,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6532 backedges. 276 proven. 613 refuted. 0 times theorem prover too weak. 5643 trivial. 0 not checked. [2025-01-09 04:06:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:34,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001353732] [2025-01-09 04:06:34,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001353732] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:34,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079355047] [2025-01-09 04:06:34,763 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 04:06:34,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:34,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:34,765 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) [2025-01-09 04:06:34,766 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 [2025-01-09 04:06:34,849 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 474 statements into 31 equivalence classes. [2025-01-09 04:06:34,862 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 67 of 474 statements. [2025-01-09 04:06:34,862 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-09 04:06:34,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:34,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 04:06:34,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6532 backedges. 1990 proven. 4 refuted. 0 times theorem prover too weak. 4538 trivial. 0 not checked. [2025-01-09 04:06:34,890 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6532 backedges. 276 proven. 613 refuted. 0 times theorem prover too weak. 5643 trivial. 0 not checked. [2025-01-09 04:06:35,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079355047] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:35,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:35,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-01-09 04:06:35,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754952276] [2025-01-09 04:06:35,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:35,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 04:06:35,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:35,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 04:06:35,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-01-09 04:06:35,800 INFO L87 Difference]: Start difference. First operand 139 states and 203 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-01-09 04:06:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:35,866 INFO L93 Difference]: Finished difference Result 262 states and 421 transitions. [2025-01-09 04:06:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 04:06:35,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 474 [2025-01-09 04:06:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:35,868 INFO L225 Difference]: With dead ends: 262 [2025-01-09 04:06:35,868 INFO L226 Difference]: Without dead ends: 129 [2025-01-09 04:06:35,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 942 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2025-01-09 04:06:35,869 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:35,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 124 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 04:06:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-01-09 04:06:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2025-01-09 04:06:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 88 states have internal predecessors, (104), 22 states have call successors, (22), 16 states have call predecessors, (22), 16 states have return successors, (61), 24 states have call predecessors, (61), 22 states have call successors, (61) [2025-01-09 04:06:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2025-01-09 04:06:35,884 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 474 [2025-01-09 04:06:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:35,885 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2025-01-09 04:06:35,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-01-09 04:06:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2025-01-09 04:06:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2025-01-09 04:06:35,886 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:35,886 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] [2025-01-09 04:06:35,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 04:06:36,086 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 [2025-01-09 04:06:36,087 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:36,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:36,087 INFO L85 PathProgramCache]: Analyzing trace with hash 49150599, now seen corresponding path program 6 times [2025-01-09 04:06:36,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:36,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558582133] [2025-01-09 04:06:36,087 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 04:06:36,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:36,098 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 351 statements into 23 equivalence classes. [2025-01-09 04:06:36,120 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 200 of 351 statements. [2025-01-09 04:06:36,120 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-01-09 04:06:36,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 515 proven. 85 refuted. 0 times theorem prover too weak. 2876 trivial. 0 not checked. [2025-01-09 04:06:36,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:36,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558582133] [2025-01-09 04:06:36,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558582133] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:36,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897379580] [2025-01-09 04:06:36,281 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 04:06:36,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:36,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:36,286 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) [2025-01-09 04:06:36,288 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 [2025-01-09 04:06:36,362 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 351 statements into 23 equivalence classes. [2025-01-09 04:06:36,396 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 200 of 351 statements. [2025-01-09 04:06:36,396 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-01-09 04:06:36,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:36,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 04:06:36,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 526 proven. 88 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2025-01-09 04:06:36,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 530 proven. 94 refuted. 0 times theorem prover too weak. 2852 trivial. 0 not checked. [2025-01-09 04:06:37,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897379580] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:37,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:37,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2025-01-09 04:06:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897132738] [2025-01-09 04:06:37,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:37,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 04:06:37,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:37,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 04:06:37,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-01-09 04:06:37,298 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2025-01-09 04:06:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:37,428 INFO L93 Difference]: Finished difference Result 151 states and 224 transitions. [2025-01-09 04:06:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 04:06:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 351 [2025-01-09 04:06:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:37,431 INFO L225 Difference]: With dead ends: 151 [2025-01-09 04:06:37,431 INFO L226 Difference]: Without dead ends: 147 [2025-01-09 04:06:37,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 692 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2025-01-09 04:06:37,431 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:37,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 189 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-01-09 04:06:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2025-01-09 04:06:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 93 states have internal predecessors, (109), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (71), 26 states have call predecessors, (71), 25 states have call successors, (71) [2025-01-09 04:06:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 205 transitions. [2025-01-09 04:06:37,440 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 205 transitions. Word has length 351 [2025-01-09 04:06:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:37,440 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 205 transitions. [2025-01-09 04:06:37,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2025-01-09 04:06:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 205 transitions. [2025-01-09 04:06:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2025-01-09 04:06:37,442 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:37,442 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 25, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:37,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-09 04:06:37,642 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 [2025-01-09 04:06:37,643 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:37,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1933855095, now seen corresponding path program 7 times [2025-01-09 04:06:37,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:37,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376333323] [2025-01-09 04:06:37,643 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 04:06:37,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:37,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 405 statements into 1 equivalence classes. [2025-01-09 04:06:37,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 405 of 405 statements. [2025-01-09 04:06:37,674 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:37,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 188 proven. 676 refuted. 0 times theorem prover too weak. 3815 trivial. 0 not checked. [2025-01-09 04:06:37,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:37,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376333323] [2025-01-09 04:06:37,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376333323] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:37,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499190416] [2025-01-09 04:06:37,914 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 04:06:37,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:37,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:37,916 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) [2025-01-09 04:06:37,918 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 [2025-01-09 04:06:38,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 405 statements into 1 equivalence classes. [2025-01-09 04:06:38,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 405 of 405 statements. [2025-01-09 04:06:38,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:06:38,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:38,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 04:06:38,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 134 proven. 993 refuted. 0 times theorem prover too weak. 3552 trivial. 0 not checked. [2025-01-09 04:06:38,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 134 proven. 1026 refuted. 0 times theorem prover too weak. 3519 trivial. 0 not checked. [2025-01-09 04:06:40,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499190416] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:40,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:40,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 26 [2025-01-09 04:06:40,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997208020] [2025-01-09 04:06:40,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:40,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 04:06:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:40,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 04:06:40,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2025-01-09 04:06:40,053 INFO L87 Difference]: Start difference. First operand 137 states and 205 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2025-01-09 04:06:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:40,275 INFO L93 Difference]: Finished difference Result 189 states and 340 transitions. [2025-01-09 04:06:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-09 04:06:40,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) Word has length 405 [2025-01-09 04:06:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:40,278 INFO L225 Difference]: With dead ends: 189 [2025-01-09 04:06:40,278 INFO L226 Difference]: Without dead ends: 185 [2025-01-09 04:06:40,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 791 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2025-01-09 04:06:40,279 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:40,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 262 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:06:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-01-09 04:06:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 174. [2025-01-09 04:06:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 115 states have internal predecessors, (131), 33 states have call successors, (33), 17 states have call predecessors, (33), 23 states have return successors, (139), 41 states have call predecessors, (139), 33 states have call successors, (139) [2025-01-09 04:06:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 303 transitions. [2025-01-09 04:06:40,291 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 303 transitions. Word has length 405 [2025-01-09 04:06:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:40,291 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 303 transitions. [2025-01-09 04:06:40,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2025-01-09 04:06:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 303 transitions. [2025-01-09 04:06:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 883 [2025-01-09 04:06:40,296 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:40,296 INFO L218 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 53, 51, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 21, 19, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:40,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-09 04:06:40,497 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 [2025-01-09 04:06:40,497 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:40,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:40,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1877727516, now seen corresponding path program 8 times [2025-01-09 04:06:40,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:40,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88876862] [2025-01-09 04:06:40,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:06:40,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:40,514 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 882 statements into 2 equivalence classes. [2025-01-09 04:06:40,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 882 of 882 statements. [2025-01-09 04:06:40,578 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:06:40,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 23005 backedges. 520 proven. 2314 refuted. 0 times theorem prover too weak. 20171 trivial. 0 not checked. [2025-01-09 04:06:41,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88876862] [2025-01-09 04:06:41,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88876862] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485442127] [2025-01-09 04:06:41,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:06:41,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:41,209 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) [2025-01-09 04:06:41,209 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 [2025-01-09 04:06:41,337 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 882 statements into 2 equivalence classes. [2025-01-09 04:06:41,480 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 882 of 882 statements. [2025-01-09 04:06:41,480 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:06:41,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:41,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 1977 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-09 04:06:41,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 23005 backedges. 374 proven. 2638 refuted. 0 times theorem prover too weak. 19993 trivial. 0 not checked. [2025-01-09 04:06:41,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23005 backedges. 374 proven. 2682 refuted. 0 times theorem prover too weak. 19949 trivial. 0 not checked. [2025-01-09 04:06:44,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485442127] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:44,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:44,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 21] total 35 [2025-01-09 04:06:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586185814] [2025-01-09 04:06:44,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:44,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-09 04:06:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:44,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-09 04:06:44,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 04:06:44,958 INFO L87 Difference]: Start difference. First operand 174 states and 303 transitions. Second operand has 35 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 35 states have internal predecessors, (113), 29 states have call successors, (36), 1 states have call predecessors, (36), 16 states have return successors, (47), 17 states have call predecessors, (47), 29 states have call successors, (47) [2025-01-09 04:06:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:45,817 INFO L93 Difference]: Finished difference Result 447 states and 966 transitions. [2025-01-09 04:06:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-01-09 04:06:45,818 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 35 states have internal predecessors, (113), 29 states have call successors, (36), 1 states have call predecessors, (36), 16 states have return successors, (47), 17 states have call predecessors, (47), 29 states have call successors, (47) Word has length 882 [2025-01-09 04:06:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:45,821 INFO L225 Difference]: With dead ends: 447 [2025-01-09 04:06:45,821 INFO L226 Difference]: Without dead ends: 246 [2025-01-09 04:06:45,824 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1818 GetRequests, 1737 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=4603, Unknown=0, NotChecked=0, Total=5402 [2025-01-09 04:06:45,825 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 176 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:45,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 620 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 04:06:45,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2025-01-09 04:06:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 210. [2025-01-09 04:06:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 142 states have internal predecessors, (164), 40 states have call successors, (40), 26 states have call predecessors, (40), 24 states have return successors, (164), 41 states have call predecessors, (164), 40 states have call successors, (164) [2025-01-09 04:06:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 368 transitions. [2025-01-09 04:06:45,840 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 368 transitions. Word has length 882 [2025-01-09 04:06:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:45,840 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 368 transitions. [2025-01-09 04:06:45,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 35 states have internal predecessors, (113), 29 states have call successors, (36), 1 states have call predecessors, (36), 16 states have return successors, (47), 17 states have call predecessors, (47), 29 states have call successors, (47) [2025-01-09 04:06:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 368 transitions. [2025-01-09 04:06:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1223 [2025-01-09 04:06:45,848 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:45,848 INFO L218 NwaCegarLoop]: trace histogram [91, 91, 88, 88, 74, 70, 45, 45, 45, 45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 30, 25, 18, 17, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:45,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-09 04:06:46,052 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 [2025-01-09 04:06:46,052 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:46,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash -75637175, now seen corresponding path program 9 times [2025-01-09 04:06:46,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:46,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771079871] [2025-01-09 04:06:46,053 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:06:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:46,075 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1222 statements into 72 equivalence classes. [2025-01-09 04:06:46,098 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 188 of 1222 statements. [2025-01-09 04:06:46,099 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-01-09 04:06:46,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 44552 backedges. 2999 proven. 72 refuted. 0 times theorem prover too weak. 41481 trivial. 0 not checked. [2025-01-09 04:06:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771079871] [2025-01-09 04:06:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771079871] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866879468] [2025-01-09 04:06:46,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:06:46,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:46,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:46,307 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) [2025-01-09 04:06:46,309 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 [2025-01-09 04:06:46,480 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1222 statements into 72 equivalence classes. [2025-01-09 04:06:46,516 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 188 of 1222 statements. [2025-01-09 04:06:46,516 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-01-09 04:06:46,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:46,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 04:06:46,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 44552 backedges. 3312 proven. 85 refuted. 0 times theorem prover too weak. 41155 trivial. 0 not checked. [2025-01-09 04:06:46,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 44552 backedges. 3312 proven. 90 refuted. 0 times theorem prover too weak. 41150 trivial. 0 not checked. [2025-01-09 04:06:49,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866879468] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:49,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:49,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 26 [2025-01-09 04:06:49,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328451256] [2025-01-09 04:06:49,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:49,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 04:06:49,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:49,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 04:06:49,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2025-01-09 04:06:49,317 INFO L87 Difference]: Start difference. First operand 210 states and 368 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 12 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (30), 18 states have call predecessors, (30), 12 states have call successors, (30) [2025-01-09 04:06:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:49,694 INFO L93 Difference]: Finished difference Result 493 states and 1059 transitions. [2025-01-09 04:06:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 04:06:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 12 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (30), 18 states have call predecessors, (30), 12 states have call successors, (30) Word has length 1222 [2025-01-09 04:06:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:49,698 INFO L225 Difference]: With dead ends: 493 [2025-01-09 04:06:49,699 INFO L226 Difference]: Without dead ends: 289 [2025-01-09 04:06:49,701 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2468 GetRequests, 2425 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 04:06:49,701 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:49,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 493 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 04:06:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2025-01-09 04:06:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 244. [2025-01-09 04:06:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 167 states have (on average 1.0658682634730539) internal successors, (178), 164 states have internal predecessors, (178), 47 states have call successors, (47), 29 states have call predecessors, (47), 29 states have return successors, (200), 50 states have call predecessors, (200), 47 states have call successors, (200) [2025-01-09 04:06:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 425 transitions. [2025-01-09 04:06:49,720 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 425 transitions. Word has length 1222 [2025-01-09 04:06:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:49,721 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 425 transitions. [2025-01-09 04:06:49,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 12 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (30), 18 states have call predecessors, (30), 12 states have call successors, (30) [2025-01-09 04:06:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 425 transitions. [2025-01-09 04:06:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1546 [2025-01-09 04:06:49,732 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:49,733 INFO L218 NwaCegarLoop]: trace histogram [140, 140, 139, 99, 81, 81, 76, 70, 70, 70, 70, 70, 70, 70, 40, 40, 40, 40, 40, 40, 40, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:49,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 04:06:49,933 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 [2025-01-09 04:06:49,933 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:49,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash 705675948, now seen corresponding path program 10 times [2025-01-09 04:06:49,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:49,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415495364] [2025-01-09 04:06:49,934 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:06:49,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:49,955 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1545 statements into 2 equivalence classes. [2025-01-09 04:06:50,135 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1321 of 1545 statements. [2025-01-09 04:06:50,135 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 04:06:50,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 77101 backedges. 864 proven. 5308 refuted. 0 times theorem prover too weak. 70929 trivial. 0 not checked. [2025-01-09 04:06:51,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415495364] [2025-01-09 04:06:51,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415495364] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264152623] [2025-01-09 04:06:51,253 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:06:51,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:51,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:51,255 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) [2025-01-09 04:06:51,257 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 [2025-01-09 04:06:51,452 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1545 statements into 2 equivalence classes. [2025-01-09 04:06:51,643 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1321 of 1545 statements. [2025-01-09 04:06:51,643 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 04:06:51,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:51,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 04:06:51,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 77101 backedges. 14645 proven. 231 refuted. 0 times theorem prover too weak. 62225 trivial. 0 not checked. [2025-01-09 04:06:51,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:06:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 77101 backedges. 861 proven. 5851 refuted. 0 times theorem prover too weak. 70389 trivial. 0 not checked. [2025-01-09 04:06:55,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264152623] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:06:55,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:06:55,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 19] total 26 [2025-01-09 04:06:55,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183954752] [2025-01-09 04:06:55,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:06:55,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 04:06:55,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:06:55,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 04:06:55,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2025-01-09 04:06:55,630 INFO L87 Difference]: Start difference. First operand 244 states and 425 transitions. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) [2025-01-09 04:06:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:06:55,977 INFO L93 Difference]: Finished difference Result 444 states and 862 transitions. [2025-01-09 04:06:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-09 04:06:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) Word has length 1545 [2025-01-09 04:06:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:06:55,980 INFO L225 Difference]: With dead ends: 444 [2025-01-09 04:06:55,980 INFO L226 Difference]: Without dead ends: 211 [2025-01-09 04:06:55,982 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3124 GetRequests, 3074 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2025-01-09 04:06:55,982 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:06:55,982 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 391 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:06:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-01-09 04:06:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2025-01-09 04:06:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 146 states have (on average 1.0684931506849316) internal successors, (156), 142 states have internal predecessors, (156), 40 states have call successors, (40), 30 states have call predecessors, (40), 21 states have return successors, (111), 35 states have call predecessors, (111), 40 states have call successors, (111) [2025-01-09 04:06:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 307 transitions. [2025-01-09 04:06:55,993 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 307 transitions. Word has length 1545 [2025-01-09 04:06:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:06:55,994 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 307 transitions. [2025-01-09 04:06:55,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) [2025-01-09 04:06:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 307 transitions. [2025-01-09 04:06:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1455 [2025-01-09 04:06:56,003 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:06:56,003 INFO L218 NwaCegarLoop]: trace histogram [108, 108, 105, 105, 86, 86, 54, 54, 54, 54, 54, 54, 54, 52, 52, 52, 52, 52, 52, 52, 34, 32, 22, 19, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:06:56,012 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 [2025-01-09 04:06:56,204 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 [2025-01-09 04:06:56,204 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:06:56,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:06:56,205 INFO L85 PathProgramCache]: Analyzing trace with hash -749032500, now seen corresponding path program 11 times [2025-01-09 04:06:56,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:06:56,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421357685] [2025-01-09 04:06:56,205 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 04:06:56,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:06:56,225 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1454 statements into 84 equivalence classes. [2025-01-09 04:06:56,439 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) and asserted 1157 of 1454 statements. [2025-01-09 04:06:56,439 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2025-01-09 04:06:56,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 63290 backedges. 1065 proven. 4316 refuted. 0 times theorem prover too weak. 57909 trivial. 0 not checked. [2025-01-09 04:06:57,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:06:57,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421357685] [2025-01-09 04:06:57,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421357685] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:06:57,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682568912] [2025-01-09 04:06:57,372 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 04:06:57,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:06:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:06:57,374 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) [2025-01-09 04:06:57,375 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 [2025-01-09 04:06:57,570 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1454 statements into 84 equivalence classes. [2025-01-09 04:06:57,906 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) and asserted 1157 of 1454 statements. [2025-01-09 04:06:57,906 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2025-01-09 04:06:57,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:06:57,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 04:06:57,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:06:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 63290 backedges. 18429 proven. 187 refuted. 0 times theorem prover too weak. 44674 trivial. 0 not checked. [2025-01-09 04:06:58,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:07:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 63290 backedges. 1074 proven. 4700 refuted. 0 times theorem prover too weak. 57516 trivial. 0 not checked. [2025-01-09 04:07:01,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682568912] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:07:01,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:07:01,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 19] total 28 [2025-01-09 04:07:01,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934642113] [2025-01-09 04:07:01,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:07:01,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-09 04:07:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:07:01,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-09 04:07:01,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2025-01-09 04:07:01,609 INFO L87 Difference]: Start difference. First operand 208 states and 307 transitions. Second operand has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 28 states have internal predecessors, (107), 18 states have call successors, (32), 2 states have call predecessors, (32), 11 states have return successors, (38), 15 states have call predecessors, (38), 18 states have call successors, (38) [2025-01-09 04:07:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:07:02,078 INFO L93 Difference]: Finished difference Result 421 states and 639 transitions. [2025-01-09 04:07:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 04:07:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 28 states have internal predecessors, (107), 18 states have call successors, (32), 2 states have call predecessors, (32), 11 states have return successors, (38), 15 states have call predecessors, (38), 18 states have call successors, (38) Word has length 1454 [2025-01-09 04:07:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:07:02,080 INFO L225 Difference]: With dead ends: 421 [2025-01-09 04:07:02,080 INFO L226 Difference]: Without dead ends: 228 [2025-01-09 04:07:02,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2944 GetRequests, 2890 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=1808, Unknown=0, NotChecked=0, Total=2162 [2025-01-09 04:07:02,082 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:07:02,082 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 438 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 04:07:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-01-09 04:07:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 206. [2025-01-09 04:07:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 145 states have (on average 1.0620689655172413) internal successors, (154), 141 states have internal predecessors, (154), 40 states have call successors, (40), 30 states have call predecessors, (40), 20 states have return successors, (104), 34 states have call predecessors, (104), 40 states have call successors, (104) [2025-01-09 04:07:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 298 transitions. [2025-01-09 04:07:02,095 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 298 transitions. Word has length 1454 [2025-01-09 04:07:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:07:02,096 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 298 transitions. [2025-01-09 04:07:02,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 28 states have internal predecessors, (107), 18 states have call successors, (32), 2 states have call predecessors, (32), 11 states have return successors, (38), 15 states have call predecessors, (38), 18 states have call successors, (38) [2025-01-09 04:07:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 298 transitions. [2025-01-09 04:07:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1660 [2025-01-09 04:07:02,108 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:07:02,108 INFO L218 NwaCegarLoop]: trace histogram [122, 122, 121, 121, 99, 98, 61, 61, 61, 61, 61, 61, 61, 60, 60, 60, 60, 60, 60, 60, 38, 38, 24, 22, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:07:02,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-01-09 04:07:02,308 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 [2025-01-09 04:07:02,309 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:07:02,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:07:02,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1098847505, now seen corresponding path program 12 times [2025-01-09 04:07:02,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:07:02,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759474374] [2025-01-09 04:07:02,310 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 04:07:02,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:07:02,336 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1659 statements into 97 equivalence classes. [2025-01-09 04:07:02,369 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 461 of 1659 statements. [2025-01-09 04:07:02,370 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-01-09 04:07:02,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:07:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 82568 backedges. 1555 proven. 4888 refuted. 0 times theorem prover too weak. 76125 trivial. 0 not checked. [2025-01-09 04:07:02,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:07:02,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759474374] [2025-01-09 04:07:02,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759474374] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:07:02,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895707280] [2025-01-09 04:07:02,754 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 04:07:02,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:07:02,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:07:02,756 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) [2025-01-09 04:07:02,758 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 [2025-01-09 04:07:02,974 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1659 statements into 97 equivalence classes. [2025-01-09 04:07:03,051 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 461 of 1659 statements. [2025-01-09 04:07:03,052 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-01-09 04:07:03,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:07:03,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-09 04:07:03,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:07:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 82568 backedges. 1555 proven. 4888 refuted. 0 times theorem prover too weak. 76125 trivial. 0 not checked. [2025-01-09 04:07:03,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:07:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 82568 backedges. 1559 proven. 4938 refuted. 0 times theorem prover too weak. 76071 trivial. 0 not checked. [2025-01-09 04:07:08,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895707280] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:07:08,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:07:08,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2025-01-09 04:07:08,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804554356] [2025-01-09 04:07:08,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:07:08,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 04:07:08,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:07:08,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 04:07:08,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-01-09 04:07:08,747 INFO L87 Difference]: Start difference. First operand 206 states and 298 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2025-01-09 04:07:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:07:08,928 INFO L93 Difference]: Finished difference Result 238 states and 377 transitions. [2025-01-09 04:07:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 04:07:08,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) Word has length 1659 [2025-01-09 04:07:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:07:08,932 INFO L225 Difference]: With dead ends: 238 [2025-01-09 04:07:08,932 INFO L226 Difference]: Without dead ends: 234 [2025-01-09 04:07:08,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3348 GetRequests, 3305 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 04:07:08,934 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:07:08,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 246 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:07:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2025-01-09 04:07:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2025-01-09 04:07:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 158 states have (on average 1.0569620253164558) internal successors, (167), 154 states have internal predecessors, (167), 45 states have call successors, (45), 30 states have call predecessors, (45), 24 states have return successors, (143), 43 states have call predecessors, (143), 45 states have call successors, (143) [2025-01-09 04:07:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 355 transitions. [2025-01-09 04:07:08,951 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 355 transitions. Word has length 1659 [2025-01-09 04:07:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:07:08,952 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 355 transitions. [2025-01-09 04:07:08,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2025-01-09 04:07:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 355 transitions. [2025-01-09 04:07:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2831 [2025-01-09 04:07:08,981 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:07:08,982 INFO L218 NwaCegarLoop]: trace histogram [210, 210, 205, 205, 169, 167, 105, 105, 105, 105, 105, 105, 105, 102, 102, 102, 102, 102, 102, 102, 65, 64, 43, 36, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:07:08,989 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 [2025-01-09 04:07:09,182 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 [2025-01-09 04:07:09,183 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:07:09,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:07:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1026166711, now seen corresponding path program 13 times [2025-01-09 04:07:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:07:09,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571036665] [2025-01-09 04:07:09,184 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 04:07:09,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:07:09,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2830 statements into 1 equivalence classes. [2025-01-09 04:07:09,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2830 of 2830 statements. [2025-01-09 04:07:09,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:07:09,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:07:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 241921 backedges. 1751 proven. 8445 refuted. 0 times theorem prover too weak. 231725 trivial. 0 not checked. [2025-01-09 04:07:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:07:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571036665] [2025-01-09 04:07:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571036665] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:07:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209972126] [2025-01-09 04:07:14,131 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 04:07:14,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:07:14,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:07:14,132 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) [2025-01-09 04:07:14,133 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 [2025-01-09 04:07:14,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2830 statements into 1 equivalence classes. [2025-01-09 04:07:14,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2830 of 2830 statements. [2025-01-09 04:07:14,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:07:14,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:07:14,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 6302 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 04:07:14,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:07:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 241921 backedges. 1249 proven. 11246 refuted. 0 times theorem prover too weak. 229426 trivial. 0 not checked. [2025-01-09 04:07:14,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:07:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 241921 backedges. 1249 proven. 11316 refuted. 0 times theorem prover too weak. 229356 trivial. 0 not checked. [2025-01-09 04:07:23,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209972126] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:07:23,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:07:23,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 32 [2025-01-09 04:07:23,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248189061] [2025-01-09 04:07:23,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:07:23,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-09 04:07:23,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:07:23,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-09 04:07:23,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2025-01-09 04:07:23,767 INFO L87 Difference]: Start difference. First operand 228 states and 355 transitions. Second operand has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) [2025-01-09 04:07:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:07:24,073 INFO L93 Difference]: Finished difference Result 297 states and 615 transitions. [2025-01-09 04:07:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 04:07:24,074 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) Word has length 2830 [2025-01-09 04:07:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:07:24,080 INFO L225 Difference]: With dead ends: 297 [2025-01-09 04:07:24,080 INFO L226 Difference]: Without dead ends: 293 [2025-01-09 04:07:24,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5693 GetRequests, 5638 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2025-01-09 04:07:24,081 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:07:24,082 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 248 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:07:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2025-01-09 04:07:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 239. [2025-01-09 04:07:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 165 states have (on average 1.0545454545454545) internal successors, (174), 161 states have internal predecessors, (174), 46 states have call successors, (46), 30 states have call predecessors, (46), 27 states have return successors, (164), 47 states have call predecessors, (164), 46 states have call successors, (164) [2025-01-09 04:07:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 384 transitions. [2025-01-09 04:07:24,100 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 384 transitions. Word has length 2830 [2025-01-09 04:07:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:07:24,101 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 384 transitions. [2025-01-09 04:07:24,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) [2025-01-09 04:07:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 384 transitions. [2025-01-09 04:07:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7776 [2025-01-09 04:07:24,321 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:07:24,323 INFO L218 NwaCegarLoop]: trace histogram [575, 575, 566, 566, 467, 458, 287, 287, 287, 287, 287, 287, 287, 283, 283, 283, 283, 283, 283, 283, 180, 175, 117, 99, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:07:24,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-01-09 04:07:24,523 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 [2025-01-09 04:07:24,523 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:07:24,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:07:24,525 INFO L85 PathProgramCache]: Analyzing trace with hash 566057424, now seen corresponding path program 14 times [2025-01-09 04:07:24,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:07:24,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980327676] [2025-01-09 04:07:24,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:07:24,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:07:24,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 7775 statements into 2 equivalence classes. [2025-01-09 04:07:26,323 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 7775 of 7775 statements. [2025-01-09 04:07:26,323 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:07:26,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:07:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1836920 backedges. 4564 proven. 27921 refuted. 0 times theorem prover too weak. 1804435 trivial. 0 not checked. [2025-01-09 04:07:48,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:07:48,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980327676] [2025-01-09 04:07:48,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980327676] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:07:48,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525214202] [2025-01-09 04:07:48,453 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:07:48,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:07:48,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:07:48,455 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:07:48,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-01-09 04:07:49,077 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 7775 statements into 2 equivalence classes.