./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const_m3.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 bd654f01b412711828f8177df5f8f7c2933e3d7436939e6c61fdcced19c9515c --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 10:16:49,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 10:16:49,079 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 10:16:49,082 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 10:16:49,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 10:16:49,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 10:16:49,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 10:16:49,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 10:16:49,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 10:16:49,106 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 10:16:49,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 10:16:49,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 10:16:49,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 10:16:49,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 10:16:49,107 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 10:16:49,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 10:16:49,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 10:16:49,107 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 10:16:49,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 10:16:49,108 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 10:16:49,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 10:16:49,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:16:49,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 10:16:49,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 10:16:49,109 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 10:16:49,109 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 10:16:49,109 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 10:16:49,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 10:16:49,110 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 10:16:49,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 10:16:49,110 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 10:16:49,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 10:16:49,110 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 -> bd654f01b412711828f8177df5f8f7c2933e3d7436939e6c61fdcced19c9515c [2025-02-05 10:16:49,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 10:16:49,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 10:16:49,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 10:16:49,333 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 10:16:49,334 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 10:16:49,334 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m3.c [2025-02-05 10:16:50,454 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b43063b25/4f6de41a6c6a4655b5dcf57aeb5f6bc7/FLAGbcd8a2e03 [2025-02-05 10:16:50,674 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 10:16:50,674 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m3.c [2025-02-05 10:16:50,680 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b43063b25/4f6de41a6c6a4655b5dcf57aeb5f6bc7/FLAGbcd8a2e03 [2025-02-05 10:16:51,041 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b43063b25/4f6de41a6c6a4655b5dcf57aeb5f6bc7 [2025-02-05 10:16:51,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 10:16:51,044 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 10:16:51,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 10:16:51,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 10:16:51,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 10:16:51,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69df3533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51, skipping insertion in model container [2025-02-05 10:16:51,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,059 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 10:16:51,177 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/array-crafted/zero_sum_const_m3.c[408,421] [2025-02-05 10:16:51,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:16:51,202 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 10:16:51,213 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/array-crafted/zero_sum_const_m3.c[408,421] [2025-02-05 10:16:51,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:16:51,244 INFO L204 MainTranslator]: Completed translation [2025-02-05 10:16:51,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51 WrapperNode [2025-02-05 10:16:51,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 10:16:51,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 10:16:51,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 10:16:51,246 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 10:16:51,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,267 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2025-02-05 10:16:51,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 10:16:51,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 10:16:51,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 10:16:51,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 10:16:51,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,278 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,289 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-05 10:16:51,289 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,294 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,297 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,298 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 10:16:51,300 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 10:16:51,301 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 10:16:51,301 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 10:16:51,301 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (1/1) ... [2025-02-05 10:16:51,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:16:51,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:16:51,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 10:16:51,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 10:16:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 10:16:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 10:16:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 10:16:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 10:16:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 10:16:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-05 10:16:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 10:16:51,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 10:16:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 10:16:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 10:16:51,406 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 10:16:51,408 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 10:16:51,510 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-05 10:16:51,510 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 10:16:51,516 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 10:16:51,516 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 10:16:51,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:16:51 BoogieIcfgContainer [2025-02-05 10:16:51,516 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 10:16:51,518 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 10:16:51,518 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 10:16:51,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 10:16:51,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:16:51" (1/3) ... [2025-02-05 10:16:51,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cef761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:16:51, skipping insertion in model container [2025-02-05 10:16:51,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:16:51" (2/3) ... [2025-02-05 10:16:51,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cef761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:16:51, skipping insertion in model container [2025-02-05 10:16:51,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:16:51" (3/3) ... [2025-02-05 10:16:51,522 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2025-02-05 10:16:51,531 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 10:16:51,533 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_const_m3.c that has 1 procedures, 18 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-02-05 10:16:51,561 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 10:16:51,568 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;@1db93ba4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 10:16:51,568 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 10:16:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 10:16:51,573 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:16:51,573 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:16:51,574 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:16:51,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:16:51,577 INFO L85 PathProgramCache]: Analyzing trace with hash -322974569, now seen corresponding path program 1 times [2025-02-05 10:16:51,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:16:51,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691624816] [2025-02-05 10:16:51,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:16:51,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:16:51,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 10:16:51,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 10:16:51,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:16:51,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:16:51,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:16:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691624816] [2025-02-05 10:16:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691624816] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:16:51,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:16:51,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 10:16:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131203621] [2025-02-05 10:16:51,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:16:51,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:16:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:16:51,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:16:51,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:16:51,742 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:16:51,778 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2025-02-05 10:16:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:16:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-02-05 10:16:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:16:51,783 INFO L225 Difference]: With dead ends: 33 [2025-02-05 10:16:51,783 INFO L226 Difference]: Without dead ends: 14 [2025-02-05 10:16:51,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:16:51,786 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:16:51,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:16:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-02-05 10:16:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-02-05 10:16:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2025-02-05 10:16:51,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 12 [2025-02-05 10:16:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:16:51,804 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2025-02-05 10:16:51,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2025-02-05 10:16:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-05 10:16:51,804 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:16:51,805 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:16:51,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 10:16:51,805 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:16:51,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:16:51,805 INFO L85 PathProgramCache]: Analyzing trace with hash 86095438, now seen corresponding path program 1 times [2025-02-05 10:16:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:16:51,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005754734] [2025-02-05 10:16:51,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:16:51,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:16:51,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-05 10:16:51,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 10:16:51,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:16:51,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 10:16:51,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:16:51,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005754734] [2025-02-05 10:16:51,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005754734] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:16:51,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:16:51,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 10:16:51,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132341354] [2025-02-05 10:16:51,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:16:51,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 10:16:51,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:16:51,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 10:16:51,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:16:51,873 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:16:51,915 INFO L93 Difference]: Finished difference Result 28 states and 44 transitions. [2025-02-05 10:16:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 10:16:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-02-05 10:16:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:16:51,916 INFO L225 Difference]: With dead ends: 28 [2025-02-05 10:16:51,916 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 10:16:51,916 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:16:51,917 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:16:51,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 7 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:16:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 10:16:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-05 10:16:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2025-02-05 10:16:51,920 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 13 [2025-02-05 10:16:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:16:51,921 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2025-02-05 10:16:51,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2025-02-05 10:16:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 10:16:51,921 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:16:51,921 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:16:51,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 10:16:51,921 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:16:51,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:16:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2047274510, now seen corresponding path program 1 times [2025-02-05 10:16:51,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:16:51,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508592741] [2025-02-05 10:16:51,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:16:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:16:51,930 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 10:16:51,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 10:16:51,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:16:51,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:16:52,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:16:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508592741] [2025-02-05 10:16:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508592741] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:16:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402194778] [2025-02-05 10:16:52,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:16:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:52,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:16:52,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:16:52,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 10:16:52,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 10:16:52,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 10:16:52,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:16:52,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:52,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 10:16:52,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:16:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:16:52,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:16:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:16:52,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402194778] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:16:52,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:16:52,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 10:16:52,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695284744] [2025-02-05 10:16:52,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:16:52,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 10:16:52,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:16:52,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 10:16:52,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-05 10:16:52,163 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:52,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:16:52,207 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2025-02-05 10:16:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 10:16:52,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-05 10:16:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:16:52,209 INFO L225 Difference]: With dead ends: 36 [2025-02-05 10:16:52,209 INFO L226 Difference]: Without dead ends: 21 [2025-02-05 10:16:52,209 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-05 10:16:52,211 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:16:52,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:16:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-05 10:16:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-02-05 10:16:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2025-02-05 10:16:52,219 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 19 [2025-02-05 10:16:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:16:52,219 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2025-02-05 10:16:52,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2025-02-05 10:16:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 10:16:52,220 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:16:52,220 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:16:52,226 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 [2025-02-05 10:16:52,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:52,421 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:16:52,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:16:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1772881801, now seen corresponding path program 2 times [2025-02-05 10:16:52,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:16:52,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312373558] [2025-02-05 10:16:52,422 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:16:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:16:52,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-05 10:16:52,472 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 10:16:52,479 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:16:52,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 10:16:52,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:16:52,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312373558] [2025-02-05 10:16:52,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312373558] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:16:52,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131467968] [2025-02-05 10:16:52,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:16:52,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:52,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:16:52,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:16:52,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 10:16:52,599 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-05 10:16:52,614 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 10:16:52,614 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:16:52,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:52,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 10:16:52,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:16:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 10:16:52,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:16:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 10:16:52,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131467968] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:16:52,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:16:52,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-05 10:16:52,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444296197] [2025-02-05 10:16:52,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:16:52,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 10:16:52,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:16:52,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 10:16:52,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-05 10:16:52,687 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:16:52,737 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2025-02-05 10:16:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 10:16:52,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-02-05 10:16:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:16:52,738 INFO L225 Difference]: With dead ends: 40 [2025-02-05 10:16:52,738 INFO L226 Difference]: Without dead ends: 27 [2025-02-05 10:16:52,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-05 10:16:52,739 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:16:52,739 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:16:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-05 10:16:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-05 10:16:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2025-02-05 10:16:52,742 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2025-02-05 10:16:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:16:52,743 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2025-02-05 10:16:52,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2025-02-05 10:16:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 10:16:52,743 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:16:52,743 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:16:52,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 10:16:52,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:52,944 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:16:52,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:16:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash 601761975, now seen corresponding path program 3 times [2025-02-05 10:16:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:16:52,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553762666] [2025-02-05 10:16:52,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:16:52,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:16:52,952 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-02-05 10:16:52,971 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 10:16:52,971 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 10:16:52,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:16:54,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:16:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553762666] [2025-02-05 10:16:54,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553762666] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:16:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883442484] [2025-02-05 10:16:54,315 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:16:54,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:54,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:16:54,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:16:54,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 10:16:54,347 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-02-05 10:16:54,364 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 10:16:54,364 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 10:16:54,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:54,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-05 10:16:54,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:16:54,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 10:16:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:16:54,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:16:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 10:16:55,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883442484] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:16:55,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:16:55,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2025-02-05 10:16:55,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583092095] [2025-02-05 10:16:55,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:16:55,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-05 10:16:55,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:16:55,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-05 10:16:55,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2025-02-05 10:16:55,471 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:56,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:16:56,011 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2025-02-05 10:16:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 10:16:56,012 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-05 10:16:56,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:16:56,012 INFO L225 Difference]: With dead ends: 46 [2025-02-05 10:16:56,012 INFO L226 Difference]: Without dead ends: 43 [2025-02-05 10:16:56,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=2782, Unknown=0, NotChecked=0, Total=2970 [2025-02-05 10:16:56,014 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 10:16:56,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 10:16:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-02-05 10:16:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2025-02-05 10:16:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2025-02-05 10:16:56,018 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 26 [2025-02-05 10:16:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:16:56,019 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2025-02-05 10:16:56,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2025-02-05 10:16:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 10:16:56,019 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:16:56,019 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:16:56,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 10:16:56,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:56,220 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:16:56,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:16:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1474783790, now seen corresponding path program 4 times [2025-02-05 10:16:56,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:16:56,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184346631] [2025-02-05 10:16:56,221 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:16:56,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:16:56,226 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-05 10:16:56,231 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 27 statements. [2025-02-05 10:16:56,231 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:16:56,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 10:16:56,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:16:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184346631] [2025-02-05 10:16:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184346631] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:16:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894297114] [2025-02-05 10:16:56,289 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:16:56,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:16:56,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:16:56,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 10:16:56,317 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-05 10:16:56,327 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 27 statements. [2025-02-05 10:16:56,327 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:16:56,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:56,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 10:16:56,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:16:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 10:16:56,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:16:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 10:16:56,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894297114] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:16:56,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:16:56,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-05 10:16:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741052421] [2025-02-05 10:16:56,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:16:56,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 10:16:56,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:16:56,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 10:16:56,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:16:56,405 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:16:56,527 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2025-02-05 10:16:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 10:16:56,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-02-05 10:16:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:16:56,528 INFO L225 Difference]: With dead ends: 86 [2025-02-05 10:16:56,528 INFO L226 Difference]: Without dead ends: 49 [2025-02-05 10:16:56,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-05 10:16:56,528 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:16:56,529 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:16:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-05 10:16:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2025-02-05 10:16:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2025-02-05 10:16:56,533 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 27 [2025-02-05 10:16:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:16:56,533 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2025-02-05 10:16:56,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2025-02-05 10:16:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 10:16:56,534 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:16:56,534 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:16:56,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 10:16:56,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 10:16:56,738 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:16:56,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:16:56,738 INFO L85 PathProgramCache]: Analyzing trace with hash -693950601, now seen corresponding path program 5 times [2025-02-05 10:16:56,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:16:56,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643791258] [2025-02-05 10:16:56,738 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:16:56,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:16:56,744 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-05 10:16:56,750 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 10:16:56,750 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-05 10:16:56,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:16:56,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:16:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643791258] [2025-02-05 10:16:56,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643791258] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:16:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388406506] [2025-02-05 10:16:56,837 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:16:56,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:16:56,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:16:56,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 10:16:56,872 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-05 10:16:56,894 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 10:16:56,894 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-05 10:16:56,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:56,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 10:16:56,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:16:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:16:56,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:16:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:16:56,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388406506] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:16:56,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:16:56,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-05 10:16:56,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619890508] [2025-02-05 10:16:56,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:16:56,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 10:16:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:16:56,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 10:16:56,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:16:56,987 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:16:57,100 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2025-02-05 10:16:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 10:16:57,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-02-05 10:16:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:16:57,102 INFO L225 Difference]: With dead ends: 49 [2025-02-05 10:16:57,102 INFO L226 Difference]: Without dead ends: 34 [2025-02-05 10:16:57,103 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2025-02-05 10:16:57,103 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:16:57,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:16:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-05 10:16:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-02-05 10:16:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2025-02-05 10:16:57,109 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2025-02-05 10:16:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:16:57,110 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2025-02-05 10:16:57,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:16:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2025-02-05 10:16:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 10:16:57,110 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:16:57,110 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:16:57,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 10:16:57,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:57,315 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:16:57,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:16:57,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1845644782, now seen corresponding path program 6 times [2025-02-05 10:16:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:16:57,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517492812] [2025-02-05 10:16:57,316 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:16:57,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:16:57,322 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-02-05 10:16:57,371 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 10:16:57,374 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-05 10:16:57,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:16:59,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:16:59,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517492812] [2025-02-05 10:16:59,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517492812] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:16:59,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380109628] [2025-02-05 10:16:59,263 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:16:59,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:16:59,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:16:59,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:16:59,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 10:16:59,311 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-02-05 10:16:59,337 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 10:16:59,337 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-05 10:16:59,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:16:59,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-02-05 10:16:59,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:16:59,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 10:17:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:17:00,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:17:01,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380109628] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:01,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:01,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 25] total 73 [2025-02-05 10:17:01,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458993580] [2025-02-05 10:17:01,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:01,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-02-05 10:17:01,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:01,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-02-05 10:17:01,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=4999, Unknown=0, NotChecked=0, Total=5256 [2025-02-05 10:17:01,180 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 73 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:02,670 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2025-02-05 10:17:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-05 10:17:02,670 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-02-05 10:17:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:02,671 INFO L225 Difference]: With dead ends: 58 [2025-02-05 10:17:02,671 INFO L226 Difference]: Without dead ends: 55 [2025-02-05 10:17:02,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=378, Invalid=7632, Unknown=0, NotChecked=0, Total=8010 [2025-02-05 10:17:02,672 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:02,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 146 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-05 10:17:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-05 10:17:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2025-02-05 10:17:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2025-02-05 10:17:02,678 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 33 [2025-02-05 10:17:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:02,678 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2025-02-05 10:17:02,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2025-02-05 10:17:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-05 10:17:02,679 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:02,679 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:02,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 10:17:02,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 10:17:02,880 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:02,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1380445143, now seen corresponding path program 7 times [2025-02-05 10:17:02,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:02,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652996586] [2025-02-05 10:17:02,880 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:17:02,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:02,885 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-05 10:17:02,889 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-05 10:17:02,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:17:02,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 10:17:02,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:02,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652996586] [2025-02-05 10:17:02,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652996586] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:02,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542642839] [2025-02-05 10:17:02,969 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:17:02,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:02,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:02,973 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:02,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 10:17:03,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-05 10:17:03,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-05 10:17:03,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:17:03,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:03,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 10:17:03,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:17:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 10:17:03,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 10:17:03,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542642839] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:03,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-05 10:17:03,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130514468] [2025-02-05 10:17:03,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:03,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 10:17:03,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:03,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 10:17:03,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-05 10:17:03,150 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:03,298 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2025-02-05 10:17:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 10:17:03,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-02-05 10:17:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:03,299 INFO L225 Difference]: With dead ends: 108 [2025-02-05 10:17:03,300 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 10:17:03,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2025-02-05 10:17:03,301 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:03,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:17:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 10:17:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2025-02-05 10:17:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2025-02-05 10:17:03,310 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 34 [2025-02-05 10:17:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:03,310 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2025-02-05 10:17:03,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2025-02-05 10:17:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-05 10:17:03,311 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:03,312 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:03,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 10:17:03,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:03,516 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:03,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash 438569710, now seen corresponding path program 8 times [2025-02-05 10:17:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033313860] [2025-02-05 10:17:03,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:17:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:03,523 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-02-05 10:17:03,538 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 10:17:03,539 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:17:03,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-05 10:17:03,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033313860] [2025-02-05 10:17:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033313860] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803294316] [2025-02-05 10:17:03,631 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:17:03,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:03,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:03,636 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:03,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 10:17:03,666 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-02-05 10:17:03,683 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 10:17:03,684 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:17:03,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:03,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 10:17:03,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:17:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-05 10:17:03,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-05 10:17:03,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803294316] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:03,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:03,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-05 10:17:03,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647115692] [2025-02-05 10:17:03,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:03,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 10:17:03,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:03,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 10:17:03,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-05 10:17:03,790 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:03,929 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2025-02-05 10:17:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 10:17:03,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-02-05 10:17:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:03,930 INFO L225 Difference]: With dead ends: 60 [2025-02-05 10:17:03,930 INFO L226 Difference]: Without dead ends: 41 [2025-02-05 10:17:03,930 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2025-02-05 10:17:03,931 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:03,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 13 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:17:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-05 10:17:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-02-05 10:17:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2025-02-05 10:17:03,936 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 35 [2025-02-05 10:17:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:03,936 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2025-02-05 10:17:03,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2025-02-05 10:17:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 10:17:03,937 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:03,937 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:03,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 10:17:04,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:04,138 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:04,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:04,138 INFO L85 PathProgramCache]: Analyzing trace with hash -795292457, now seen corresponding path program 9 times [2025-02-05 10:17:04,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:04,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881668315] [2025-02-05 10:17:04,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:17:04,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:04,144 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 3 equivalence classes. [2025-02-05 10:17:04,160 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 10:17:04,161 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 10:17:04,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 10:17:06,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:06,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881668315] [2025-02-05 10:17:06,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881668315] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:06,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490876446] [2025-02-05 10:17:06,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:17:06,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:06,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:06,492 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:06,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 10:17:06,547 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 3 equivalence classes. [2025-02-05 10:17:06,574 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 10:17:06,574 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 10:17:06,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:06,575 WARN L254 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 119 conjuncts are in the unsatisfiable core [2025-02-05 10:17:06,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:17:06,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-05 10:17:08,524 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 10:17:08,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:17:08,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 9 [2025-02-05 10:17:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:17:08,649 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:17:19,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490876446] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:19,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:19,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 97 [2025-02-05 10:17:19,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987451562] [2025-02-05 10:17:19,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:19,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-02-05 10:17:19,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:19,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-02-05 10:17:19,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=8816, Unknown=9, NotChecked=0, Total=9312 [2025-02-05 10:17:19,351 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 97 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:24,740 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2025-02-05 10:17:24,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-05 10:17:24,740 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 97 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-02-05 10:17:24,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:24,741 INFO L225 Difference]: With dead ends: 72 [2025-02-05 10:17:24,741 INFO L226 Difference]: Without dead ends: 62 [2025-02-05 10:17:24,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=978, Invalid=16304, Unknown=10, NotChecked=0, Total=17292 [2025-02-05 10:17:24,744 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:24,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-05 10:17:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-05 10:17:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2025-02-05 10:17:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2025-02-05 10:17:24,761 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 40 [2025-02-05 10:17:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:24,762 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2025-02-05 10:17:24,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 97 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2025-02-05 10:17:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 10:17:24,764 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:24,764 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:24,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 10:17:24,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:24,966 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:24,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:24,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1051125230, now seen corresponding path program 10 times [2025-02-05 10:17:24,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:24,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365496581] [2025-02-05 10:17:24,966 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:17:24,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:24,971 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-02-05 10:17:24,975 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 38 of 41 statements. [2025-02-05 10:17:24,975 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:17:24,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 10:17:25,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:25,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365496581] [2025-02-05 10:17:25,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365496581] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:25,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262023700] [2025-02-05 10:17:25,136 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:17:25,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:25,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:25,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:25,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 10:17:25,171 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-02-05 10:17:25,188 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 38 of 41 statements. [2025-02-05 10:17:25,188 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:17:25,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:25,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 10:17:25,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:17:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 10:17:25,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 10:17:25,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262023700] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:25,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:25,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-05 10:17:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979892804] [2025-02-05 10:17:25,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:25,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 10:17:25,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:25,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 10:17:25,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-05 10:17:25,360 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:25,555 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2025-02-05 10:17:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 10:17:25,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-02-05 10:17:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:25,556 INFO L225 Difference]: With dead ends: 125 [2025-02-05 10:17:25,556 INFO L226 Difference]: Without dead ends: 71 [2025-02-05 10:17:25,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-02-05 10:17:25,557 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:25,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:17:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-02-05 10:17:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2025-02-05 10:17:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2025-02-05 10:17:25,569 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 41 [2025-02-05 10:17:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:25,569 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2025-02-05 10:17:25,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2025-02-05 10:17:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-05 10:17:25,570 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:25,570 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:25,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 10:17:25,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 10:17:25,770 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:25,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1803979881, now seen corresponding path program 11 times [2025-02-05 10:17:25,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:25,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460003804] [2025-02-05 10:17:25,771 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:17:25,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:25,775 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 4 equivalence classes. [2025-02-05 10:17:25,784 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 10:17:25,784 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 10:17:25,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 10:17:25,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:25,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460003804] [2025-02-05 10:17:25,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460003804] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:25,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857329374] [2025-02-05 10:17:25,888 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:17:25,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:25,892 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:25,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 10:17:25,933 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 4 equivalence classes. [2025-02-05 10:17:26,008 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 10:17:26,009 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 10:17:26,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:26,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 10:17:26,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:17:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 10:17:26,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 10:17:26,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857329374] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:26,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:26,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-05 10:17:26,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842916216] [2025-02-05 10:17:26,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:26,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 10:17:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:26,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 10:17:26,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-05 10:17:26,169 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:26,363 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2025-02-05 10:17:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 10:17:26,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2025-02-05 10:17:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:26,364 INFO L225 Difference]: With dead ends: 71 [2025-02-05 10:17:26,365 INFO L226 Difference]: Without dead ends: 48 [2025-02-05 10:17:26,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2025-02-05 10:17:26,366 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:26,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:17:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-05 10:17:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-02-05 10:17:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2025-02-05 10:17:26,376 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 42 [2025-02-05 10:17:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:26,376 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2025-02-05 10:17:26,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2025-02-05 10:17:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 10:17:26,376 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:26,377 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:26,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 10:17:26,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 10:17:26,583 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:26,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1366320590, now seen corresponding path program 12 times [2025-02-05 10:17:26,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:26,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204029783] [2025-02-05 10:17:26,583 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:17:26,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:26,592 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 4 equivalence classes. [2025-02-05 10:17:26,631 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 10:17:26,631 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-05 10:17:26,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:17:30,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204029783] [2025-02-05 10:17:30,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204029783] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954391806] [2025-02-05 10:17:30,076 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:17:30,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:30,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:30,078 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:30,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 10:17:30,122 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 4 equivalence classes. [2025-02-05 10:17:30,154 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 10:17:30,155 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-05 10:17:30,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:30,165 WARN L254 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 143 conjuncts are in the unsatisfiable core [2025-02-05 10:17:30,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:17:30,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-05 10:17:32,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:17:32,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2025-02-05 10:17:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 10:17:32,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 10:17:35,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954391806] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:35,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:35,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40, 40] total 117 [2025-02-05 10:17:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589381891] [2025-02-05 10:17:35,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:35,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2025-02-05 10:17:35,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:35,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2025-02-05 10:17:35,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=12683, Unknown=0, NotChecked=0, Total=13572 [2025-02-05 10:17:35,530 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 117 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:50,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:50,379 INFO L93 Difference]: Finished difference Result 211 states and 276 transitions. [2025-02-05 10:17:50,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2025-02-05 10:17:50,379 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-02-05 10:17:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:50,381 INFO L225 Difference]: With dead ends: 211 [2025-02-05 10:17:50,381 INFO L226 Difference]: Without dead ends: 208 [2025-02-05 10:17:50,384 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8379 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=3693, Invalid=32597, Unknown=0, NotChecked=0, Total=36290 [2025-02-05 10:17:50,384 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 5754 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 6742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 5754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:50,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 6742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 5754 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2025-02-05 10:17:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2025-02-05 10:17:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 162. [2025-02-05 10:17:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2857142857142858) internal successors, (207), 161 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 207 transitions. [2025-02-05 10:17:50,448 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 207 transitions. Word has length 47 [2025-02-05 10:17:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:50,448 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 207 transitions. [2025-02-05 10:17:50,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 207 transitions. [2025-02-05 10:17:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 10:17:50,451 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:50,451 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:50,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 10:17:50,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:50,652 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:50,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:50,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1837386318, now seen corresponding path program 13 times [2025-02-05 10:17:50,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:50,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670638411] [2025-02-05 10:17:50,653 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:17:50,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:50,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 10:17:50,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 10:17:50,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:17:50,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-05 10:17:50,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670638411] [2025-02-05 10:17:50,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670638411] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056064087] [2025-02-05 10:17:50,934 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:17:50,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:50,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:50,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:50,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 10:17:50,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 10:17:51,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 10:17:51,001 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:17:51,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:51,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 10:17:51,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:17:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-05 10:17:51,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-05 10:17:51,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056064087] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:51,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:51,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-05 10:17:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132840900] [2025-02-05 10:17:51,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:51,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 10:17:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:51,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 10:17:51,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-02-05 10:17:51,175 INFO L87 Difference]: Start difference. First operand 162 states and 207 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:51,593 INFO L93 Difference]: Finished difference Result 256 states and 329 transitions. [2025-02-05 10:17:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 10:17:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-02-05 10:17:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:51,594 INFO L225 Difference]: With dead ends: 256 [2025-02-05 10:17:51,594 INFO L226 Difference]: Without dead ends: 161 [2025-02-05 10:17:51,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2025-02-05 10:17:51,595 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:51,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 10:17:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2025-02-05 10:17:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 143. [2025-02-05 10:17:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2605633802816902) internal successors, (179), 142 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2025-02-05 10:17:51,635 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 49 [2025-02-05 10:17:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:51,635 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2025-02-05 10:17:51,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2025-02-05 10:17:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 10:17:51,636 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:51,636 INFO L218 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:51,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-05 10:17:51,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:51,840 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:51,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash 683159255, now seen corresponding path program 14 times [2025-02-05 10:17:51,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:51,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74913000] [2025-02-05 10:17:51,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:17:51,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:51,845 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-05 10:17:51,850 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 10:17:51,850 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:17:51,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-05 10:17:52,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74913000] [2025-02-05 10:17:52,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74913000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296520448] [2025-02-05 10:17:52,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:17:52,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:52,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:52,028 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:52,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 10:17:52,068 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-05 10:17:52,092 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 10:17:52,093 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:17:52,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:52,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 10:17:52,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:17:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 10:17:52,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:17:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 10:17:52,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296520448] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:17:52,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:17:52,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 25 [2025-02-05 10:17:52,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833531659] [2025-02-05 10:17:52,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:17:52,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 10:17:52,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:17:52,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 10:17:52,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2025-02-05 10:17:52,323 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:17:52,604 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2025-02-05 10:17:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 10:17:52,605 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-02-05 10:17:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:17:52,605 INFO L225 Difference]: With dead ends: 188 [2025-02-05 10:17:52,605 INFO L226 Difference]: Without dead ends: 55 [2025-02-05 10:17:52,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2025-02-05 10:17:52,606 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:17:52,606 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:17:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-05 10:17:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-02-05 10:17:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2025-02-05 10:17:52,622 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 50 [2025-02-05 10:17:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:17:52,622 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2025-02-05 10:17:52,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:17:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2025-02-05 10:17:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-05 10:17:52,622 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:17:52,622 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:17:52,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 10:17:52,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 10:17:52,823 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:17:52,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:17:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1965967113, now seen corresponding path program 15 times [2025-02-05 10:17:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:17:52,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702235250] [2025-02-05 10:17:52,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:17:52,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:17:52,835 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 4 equivalence classes. [2025-02-05 10:17:52,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 54 of 54 statements. [2025-02-05 10:17:52,882 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 10:17:52,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:17:57,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:17:57,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702235250] [2025-02-05 10:17:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702235250] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:17:57,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215612064] [2025-02-05 10:17:57,725 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:17:57,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:17:57,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:17:57,727 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:17:57,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 10:17:57,766 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 4 equivalence classes. [2025-02-05 10:17:57,803 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 54 of 54 statements. [2025-02-05 10:17:57,804 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 10:17:57,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:17:57,811 WARN L254 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 165 conjuncts are in the unsatisfiable core [2025-02-05 10:17:57,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:18:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-05 10:18:00,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:18:00,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 39 [2025-02-05 10:18:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 10:18:00,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:18:05,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:18:05,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 153 [2025-02-05 10:18:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 10:18:05,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215612064] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:18:05,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:18:05,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 45, 44] total 132 [2025-02-05 10:18:05,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156095694] [2025-02-05 10:18:05,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:18:05,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2025-02-05 10:18:05,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:05,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2025-02-05 10:18:05,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=16724, Unknown=0, NotChecked=0, Total=17292 [2025-02-05 10:18:05,530 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 132 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 132 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:17,350 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2025-02-05 10:18:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2025-02-05 10:18:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 132 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2025-02-05 10:18:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:17,351 INFO L225 Difference]: With dead ends: 135 [2025-02-05 10:18:17,351 INFO L226 Difference]: Without dead ends: 132 [2025-02-05 10:18:17,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9927 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1330, Invalid=38470, Unknown=0, NotChecked=0, Total=39800 [2025-02-05 10:18:17,361 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 5204 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 5364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 5204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:17,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 194 Invalid, 5364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 5204 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2025-02-05 10:18:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-05 10:18:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 85. [2025-02-05 10:18:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2025-02-05 10:18:17,404 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 54 [2025-02-05 10:18:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:17,408 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2025-02-05 10:18:17,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 132 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2025-02-05 10:18:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 10:18:17,408 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:17,409 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:17,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-05 10:18:17,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 10:18:17,609 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:17,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash -815406610, now seen corresponding path program 16 times [2025-02-05 10:18:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646866802] [2025-02-05 10:18:17,610 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:18:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:17,616 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-05 10:18:17,626 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 52 of 55 statements. [2025-02-05 10:18:17,627 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:18:17,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-05 10:18:17,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:17,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646866802] [2025-02-05 10:18:17,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646866802] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:18:17,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721146702] [2025-02-05 10:18:17,843 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:18:17,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:17,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:18:17,848 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:18:17,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 10:18:17,890 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-05 10:18:17,911 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 52 of 55 statements. [2025-02-05 10:18:17,911 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:18:17,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:17,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 10:18:17,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:18:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-05 10:18:18,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:18:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-05 10:18:18,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721146702] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:18:18,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:18:18,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-02-05 10:18:18,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896459104] [2025-02-05 10:18:18,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:18:18,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 10:18:18,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:18,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 10:18:18,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-02-05 10:18:18,190 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:18,464 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2025-02-05 10:18:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 10:18:18,464 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2025-02-05 10:18:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:18,465 INFO L225 Difference]: With dead ends: 174 [2025-02-05 10:18:18,465 INFO L226 Difference]: Without dead ends: 93 [2025-02-05 10:18:18,465 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2025-02-05 10:18:18,465 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:18,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 29 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:18:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-02-05 10:18:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2025-02-05 10:18:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2025-02-05 10:18:18,494 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 55 [2025-02-05 10:18:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:18,494 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2025-02-05 10:18:18,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2025-02-05 10:18:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-05 10:18:18,494 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:18,494 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:18,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-05 10:18:18,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 10:18:18,698 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:18,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:18,698 INFO L85 PathProgramCache]: Analyzing trace with hash 223610807, now seen corresponding path program 17 times [2025-02-05 10:18:18,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:18,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175577871] [2025-02-05 10:18:18,699 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:18:18,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:18,704 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 5 equivalence classes. [2025-02-05 10:18:18,720 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 10:18:18,721 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-05 10:18:18,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-02-05 10:18:18,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175577871] [2025-02-05 10:18:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175577871] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:18:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451995242] [2025-02-05 10:18:18,866 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:18:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:18:18,867 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:18:18,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 10:18:18,911 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 5 equivalence classes. [2025-02-05 10:18:18,973 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 10:18:18,973 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-05 10:18:18,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:18,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 10:18:18,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:18:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-02-05 10:18:19,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:18:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-02-05 10:18:19,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451995242] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:18:19,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:18:19,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-02-05 10:18:19,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054563823] [2025-02-05 10:18:19,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:18:19,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 10:18:19,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:19,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 10:18:19,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-02-05 10:18:19,185 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:19,442 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2025-02-05 10:18:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 10:18:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2025-02-05 10:18:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:19,443 INFO L225 Difference]: With dead ends: 93 [2025-02-05 10:18:19,443 INFO L226 Difference]: Without dead ends: 62 [2025-02-05 10:18:19,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2025-02-05 10:18:19,444 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:19,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:18:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-05 10:18:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2025-02-05 10:18:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2025-02-05 10:18:19,462 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 56 [2025-02-05 10:18:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:19,462 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2025-02-05 10:18:19,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2025-02-05 10:18:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-02-05 10:18:19,463 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:19,463 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:19,469 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 [2025-02-05 10:18:19,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:19,667 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:19,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1513043374, now seen corresponding path program 18 times [2025-02-05 10:18:19,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:19,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481675812] [2025-02-05 10:18:19,668 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:18:19,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:19,677 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 61 statements into 5 equivalence classes. [2025-02-05 10:18:19,734 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 10:18:19,734 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 10:18:19,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:18:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481675812] [2025-02-05 10:18:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481675812] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:18:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026702737] [2025-02-05 10:18:25,201 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:18:25,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:25,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:18:25,204 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:18:25,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 10:18:25,247 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 61 statements into 5 equivalence classes. [2025-02-05 10:18:25,329 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 10:18:25,329 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 10:18:25,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:25,332 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 202 conjuncts are in the unsatisfiable core [2025-02-05 10:18:25,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:18:25,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1