./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sum10-1.i --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/reducercommutativity/sum10-1.i -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 f341d659968a9193c951bd8eec2bcf2a384f8494a1f57cb579da98ce5ebdb030 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 10:05:34,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 10:05:34,501 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 10:05:34,505 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 10:05:34,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 10:05:34,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 10:05:34,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 10:05:34,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 10:05:34,529 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 10:05:34,530 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 10:05:34,530 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 10:05:34,530 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 10:05:34,530 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 10:05:34,530 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 10:05:34,531 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 10:05:34,531 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:05:34,531 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 10:05:34,531 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 10:05:34,532 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 10:05:34,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 10:05:34,532 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 10:05:34,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 10:05:34,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 10:05:34,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 10:05:34,532 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 -> f341d659968a9193c951bd8eec2bcf2a384f8494a1f57cb579da98ce5ebdb030 [2025-02-05 10:05:34,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 10:05:34,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 10:05:34,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 10:05:34,753 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 10:05:34,754 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 10:05:34,754 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum10-1.i [2025-02-05 10:05:35,876 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/85bb1c7b4/913a2ec9650040d690046bf1a7a4c3ac/FLAGdd8ea9889 [2025-02-05 10:05:36,100 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 10:05:36,105 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum10-1.i [2025-02-05 10:05:36,113 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/85bb1c7b4/913a2ec9650040d690046bf1a7a4c3ac/FLAGdd8ea9889 [2025-02-05 10:05:36,451 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/85bb1c7b4/913a2ec9650040d690046bf1a7a4c3ac [2025-02-05 10:05:36,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 10:05:36,453 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 10:05:36,454 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 10:05:36,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 10:05:36,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 10:05:36,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5521b8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36, skipping insertion in model container [2025-02-05 10:05:36,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,472 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 10:05:36,582 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/reducercommutativity/sum10-1.i[1277,1290] [2025-02-05 10:05:36,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:05:36,592 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 10:05:36,606 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/reducercommutativity/sum10-1.i[1277,1290] [2025-02-05 10:05:36,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:05:36,621 INFO L204 MainTranslator]: Completed translation [2025-02-05 10:05:36,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36 WrapperNode [2025-02-05 10:05:36,622 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 10:05:36,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 10:05:36,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 10:05:36,623 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 10:05:36,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,631 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,645 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2025-02-05 10:05:36,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 10:05:36,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 10:05:36,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 10:05:36,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 10:05:36,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,663 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2025-02-05 10:05:36,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,664 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,670 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,672 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 10:05:36,676 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 10:05:36,676 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 10:05:36,676 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 10:05:36,680 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (1/1) ... [2025-02-05 10:05:36,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:05:36,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:36,702 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 10:05:36,704 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 10:05:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2025-02-05 10:05:36,721 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 10:05:36,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 10:05:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 10:05:36,773 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 10:05:36,774 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 10:05:36,857 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L28: call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset; [2025-02-05 10:05:36,877 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-02-05 10:05:36,877 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 10:05:36,883 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 10:05:36,883 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 10:05:36,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:05:36 BoogieIcfgContainer [2025-02-05 10:05:36,884 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 10:05:36,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 10:05:36,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 10:05:36,889 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 10:05:36,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:05:36" (1/3) ... [2025-02-05 10:05:36,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fb2e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:05:36, skipping insertion in model container [2025-02-05 10:05:36,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:05:36" (2/3) ... [2025-02-05 10:05:36,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fb2e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:05:36, skipping insertion in model container [2025-02-05 10:05:36,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:05:36" (3/3) ... [2025-02-05 10:05:36,891 INFO L128 eAbstractionObserver]: Analyzing ICFG sum10-1.i [2025-02-05 10:05:36,899 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 10:05:36,900 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sum10-1.i that has 2 procedures, 21 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-05 10:05:36,929 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 10:05:36,937 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;@5c30d83f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 10:05:36,937 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 10:05:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 10:05:36,946 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:36,946 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:36,947 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:36,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:36,951 INFO L85 PathProgramCache]: Analyzing trace with hash -871894356, now seen corresponding path program 1 times [2025-02-05 10:05:36,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:36,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595411349] [2025-02-05 10:05:36,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:05:36,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:37,004 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 10:05:37,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 10:05:37,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:37,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:05:37,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:37,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595411349] [2025-02-05 10:05:37,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595411349] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:05:37,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:05:37,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 10:05:37,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922299585] [2025-02-05 10:05:37,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:05:37,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:05:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:37,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:05:37,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:05:37,149 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 10:05:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:37,166 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2025-02-05 10:05:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:05:37,167 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2025-02-05 10:05:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:37,170 INFO L225 Difference]: With dead ends: 40 [2025-02-05 10:05:37,171 INFO L226 Difference]: Without dead ends: 18 [2025-02-05 10:05:37,172 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 10:05:37,174 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:37,174 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-02-05 10:05:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-02-05 10:05:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-02-05 10:05:37,197 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2025-02-05 10:05:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:37,197 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-02-05 10:05:37,197 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 10:05:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-02-05 10:05:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 10:05:37,199 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:37,199 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:37,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 10:05:37,200 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:37,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -753694787, now seen corresponding path program 1 times [2025-02-05 10:05:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:37,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535917905] [2025-02-05 10:05:37,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:05:37,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:37,218 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 10:05:37,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 10:05:37,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:37,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:05:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:37,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535917905] [2025-02-05 10:05:37,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535917905] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:37,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737157043] [2025-02-05 10:05:37,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:05:37,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:37,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:37,318 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 10:05:37,319 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 10:05:37,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 10:05:37,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 10:05:37,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:37,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:37,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-05 10:05:37,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 10:05:37,419 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:05:37,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737157043] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:05:37,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:05:37,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-02-05 10:05:37,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763248144] [2025-02-05 10:05:37,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:05:37,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:05:37,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:37,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:05:37,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 10:05:37,422 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 10:05:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:37,429 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2025-02-05 10:05:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:05:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-02-05 10:05:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:37,430 INFO L225 Difference]: With dead ends: 32 [2025-02-05 10:05:37,430 INFO L226 Difference]: Without dead ends: 19 [2025-02-05 10:05:37,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 10:05:37,431 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:37,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-05 10:05:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-02-05 10:05:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-02-05 10:05:37,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2025-02-05 10:05:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:37,437 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-02-05 10:05:37,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 10:05:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-02-05 10:05:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 10:05:37,439 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:37,439 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:37,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 10:05:37,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:37,640 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:37,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:37,641 INFO L85 PathProgramCache]: Analyzing trace with hash 319447963, now seen corresponding path program 1 times [2025-02-05 10:05:37,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:37,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784056618] [2025-02-05 10:05:37,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:05:37,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:37,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-05 10:05:37,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 10:05:37,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:37,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 10:05:37,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:37,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784056618] [2025-02-05 10:05:37,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784056618] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:37,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744760230] [2025-02-05 10:05:37,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:05:37,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:37,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:37,725 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 10:05:37,726 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 10:05:37,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-05 10:05:37,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 10:05:37,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:37,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:37,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-05 10:05:37,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 10:05:37,795 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:05:37,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744760230] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:05:37,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:05:37,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-02-05 10:05:37,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382301017] [2025-02-05 10:05:37,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:05:37,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:05:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:37,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:05:37,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 10:05:37,797 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 10:05:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:37,806 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2025-02-05 10:05:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:05:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2025-02-05 10:05:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:37,807 INFO L225 Difference]: With dead ends: 30 [2025-02-05 10:05:37,807 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 10:05:37,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 10:05:37,808 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:37,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 10:05:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-05 10:05:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-02-05 10:05:37,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 28 [2025-02-05 10:05:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:37,811 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-02-05 10:05:37,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 10:05:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-02-05 10:05:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 10:05:37,812 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:37,812 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:37,818 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 10:05:38,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:38,016 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:38,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1391912268, now seen corresponding path program 1 times [2025-02-05 10:05:38,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:38,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245217875] [2025-02-05 10:05:38,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:05:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:38,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 10:05:38,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 10:05:38,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:38,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 10:05:38,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:38,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245217875] [2025-02-05 10:05:38,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245217875] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:38,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218915838] [2025-02-05 10:05:38,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:05:38,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:38,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:38,114 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 10:05:38,116 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 10:05:38,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 10:05:38,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 10:05:38,176 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:38,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:38,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 10:05:38,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 10:05:38,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:05:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 10:05:38,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218915838] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:05:38,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:05:38,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 10:05:38,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81473307] [2025-02-05 10:05:38,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:05:38,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 10:05:38,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:38,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 10:05:38,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 10:05:38,224 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-05 10:05:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:38,234 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2025-02-05 10:05:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 10:05:38,234 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), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 29 [2025-02-05 10:05:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:38,235 INFO L225 Difference]: With dead ends: 39 [2025-02-05 10:05:38,235 INFO L226 Difference]: Without dead ends: 23 [2025-02-05 10:05:38,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 10:05:38,236 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:38,236 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-05 10:05:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-05 10:05:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2025-02-05 10:05:38,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2025-02-05 10:05:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:38,239 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2025-02-05 10:05:38,239 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), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-05 10:05:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2025-02-05 10:05:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 10:05:38,239 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:38,239 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:38,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 10:05:38,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:38,440 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:38,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash 739990779, now seen corresponding path program 2 times [2025-02-05 10:05:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:38,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627555476] [2025-02-05 10:05:38,441 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:05:38,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:38,451 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-05 10:05:38,472 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 10:05:38,472 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:05:38,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 10:05:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:38,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627555476] [2025-02-05 10:05:38,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627555476] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:38,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064632226] [2025-02-05 10:05:38,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:05:38,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:38,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:38,523 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 10:05:38,524 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 10:05:38,560 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-05 10:05:38,579 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 10:05:38,579 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:05:38,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:38,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 10:05:38,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 10:05:38,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:05:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 10:05:38,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064632226] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:05:38,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:05:38,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2025-02-05 10:05:38,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873354037] [2025-02-05 10:05:38,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:05:38,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-05 10:05:38,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:38,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-05 10:05:38,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-02-05 10:05:38,688 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 10:05:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:38,713 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2025-02-05 10:05:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 10:05:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2025-02-05 10:05:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:38,714 INFO L225 Difference]: With dead ends: 46 [2025-02-05 10:05:38,714 INFO L226 Difference]: Without dead ends: 30 [2025-02-05 10:05:38,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-02-05 10:05:38,715 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:38,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-05 10:05:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-02-05 10:05:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2025-02-05 10:05:38,718 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 32 [2025-02-05 10:05:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:38,719 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2025-02-05 10:05:38,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 10:05:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2025-02-05 10:05:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 10:05:38,720 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:38,720 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:38,726 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 10:05:38,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:38,921 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:38,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1065502521, now seen corresponding path program 3 times [2025-02-05 10:05:38,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:38,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011693249] [2025-02-05 10:05:38,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:05:38,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:38,933 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 6 equivalence classes. [2025-02-05 10:05:38,939 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 41 statements. [2025-02-05 10:05:38,940 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 10:05:38,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-05 10:05:38,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:38,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011693249] [2025-02-05 10:05:38,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011693249] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:38,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995519356] [2025-02-05 10:05:38,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:05:38,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:38,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:38,979 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 10:05:38,981 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 10:05:39,023 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 6 equivalence classes. [2025-02-05 10:05:39,035 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 41 statements. [2025-02-05 10:05:39,035 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 10:05:39,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:39,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 10:05:39,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-05 10:05:39,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:05:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-05 10:05:39,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995519356] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:05:39,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:05:39,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-05 10:05:39,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704975239] [2025-02-05 10:05:39,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:05:39,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 10:05:39,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:39,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 10:05:39,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-05 10:05:39,096 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 10:05:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:39,109 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2025-02-05 10:05:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 10:05:39,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2025-02-05 10:05:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:39,110 INFO L225 Difference]: With dead ends: 50 [2025-02-05 10:05:39,110 INFO L226 Difference]: Without dead ends: 34 [2025-02-05 10:05:39,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-05 10:05:39,111 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:39,111 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:39,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-05 10:05:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-02-05 10:05:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2025-02-05 10:05:39,114 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 41 [2025-02-05 10:05:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:39,114 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2025-02-05 10:05:39,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 10:05:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2025-02-05 10:05:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-05 10:05:39,115 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:39,115 INFO L218 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:39,125 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 10:05:39,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:39,319 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:39,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:39,319 INFO L85 PathProgramCache]: Analyzing trace with hash 571879865, now seen corresponding path program 4 times [2025-02-05 10:05:39,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:39,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485546371] [2025-02-05 10:05:39,319 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:05:39,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:39,331 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-02-05 10:05:39,345 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 10:05:39,345 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 10:05:39,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2025-02-05 10:05:39,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485546371] [2025-02-05 10:05:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485546371] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574189876] [2025-02-05 10:05:39,454 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:05:39,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:39,457 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 10:05:39,458 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 10:05:39,504 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-02-05 10:05:39,556 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 10:05:39,556 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 10:05:39,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:39,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 10:05:39,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-02-05 10:05:39,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:05:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2025-02-05 10:05:39,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574189876] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:05:39,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:05:39,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-05 10:05:39,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919937527] [2025-02-05 10:05:39,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:05:39,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 10:05:39,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:39,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 10:05:39,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:05:39,642 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 10:05:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:39,656 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2025-02-05 10:05:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 10:05:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2025-02-05 10:05:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:39,657 INFO L225 Difference]: With dead ends: 58 [2025-02-05 10:05:39,657 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 10:05:39,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:05:39,658 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:39,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 10:05:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-05 10:05:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2025-02-05 10:05:39,661 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 53 [2025-02-05 10:05:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:39,661 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2025-02-05 10:05:39,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 10:05:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2025-02-05 10:05:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-02-05 10:05:39,662 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:39,662 INFO L218 NwaCegarLoop]: trace histogram [30, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:39,668 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 10:05:39,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 10:05:39,867 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:39,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 628022329, now seen corresponding path program 5 times [2025-02-05 10:05:39,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:39,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070186904] [2025-02-05 10:05:39,868 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:05:39,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:39,879 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 13 equivalence classes. [2025-02-05 10:05:39,966 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 54 of 65 statements. [2025-02-05 10:05:39,966 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-05 10:05:39,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2025-02-05 10:05:40,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:40,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070186904] [2025-02-05 10:05:40,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070186904] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:40,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682084141] [2025-02-05 10:05:40,037 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:05:40,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:40,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:40,039 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 10:05:40,041 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 10:05:40,096 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 13 equivalence classes. [2025-02-05 10:05:40,188 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 54 of 65 statements. [2025-02-05 10:05:40,188 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-05 10:05:40,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:40,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 10:05:40,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 248 proven. 1 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2025-02-05 10:05:40,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:05:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2025-02-05 10:05:40,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682084141] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:05:40,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:05:40,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-02-05 10:05:40,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249351778] [2025-02-05 10:05:40,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:05:40,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 10:05:40,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:40,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 10:05:40,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:05:40,219 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:05:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:40,231 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2025-02-05 10:05:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 10:05:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2025-02-05 10:05:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:40,232 INFO L225 Difference]: With dead ends: 60 [2025-02-05 10:05:40,232 INFO L226 Difference]: Without dead ends: 41 [2025-02-05 10:05:40,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:05:40,233 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:40,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-05 10:05:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-02-05 10:05:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2025-02-05 10:05:40,239 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 65 [2025-02-05 10:05:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:40,241 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2025-02-05 10:05:40,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:05:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2025-02-05 10:05:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-02-05 10:05:40,241 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:40,241 INFO L218 NwaCegarLoop]: trace histogram [30, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:40,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 10:05:40,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:40,446 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:40,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:40,446 INFO L85 PathProgramCache]: Analyzing trace with hash 486684556, now seen corresponding path program 6 times [2025-02-05 10:05:40,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:40,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031933622] [2025-02-05 10:05:40,446 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:05:40,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:40,461 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 13 equivalence classes. [2025-02-05 10:05:40,524 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 48 of 68 statements. [2025-02-05 10:05:40,524 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-05 10:05:40,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2025-02-05 10:05:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031933622] [2025-02-05 10:05:40,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031933622] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478149357] [2025-02-05 10:05:40,594 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:05:40,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:40,596 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 10:05:40,597 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 10:05:40,652 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 13 equivalence classes. [2025-02-05 10:05:40,698 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 48 of 68 statements. [2025-02-05 10:05:40,698 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-05 10:05:40,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:40,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 10:05:40,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 248 proven. 10 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2025-02-05 10:05:40,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:05:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2025-02-05 10:05:40,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478149357] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:05:40,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:05:40,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-02-05 10:05:40,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506059737] [2025-02-05 10:05:40,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:05:40,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 10:05:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:05:40,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 10:05:40,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:05:40,787 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:05:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:05:40,802 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2025-02-05 10:05:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 10:05:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2025-02-05 10:05:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:05:40,804 INFO L225 Difference]: With dead ends: 65 [2025-02-05 10:05:40,804 INFO L226 Difference]: Without dead ends: 46 [2025-02-05 10:05:40,805 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:05:40,805 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:05:40,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:05:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-05 10:05:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-02-05 10:05:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 10:05:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2025-02-05 10:05:40,813 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 68 [2025-02-05 10:05:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:05:40,814 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2025-02-05 10:05:40,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:05:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2025-02-05 10:05:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-02-05 10:05:40,815 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:05:40,815 INFO L218 NwaCegarLoop]: trace histogram [30, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:05:40,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 10:05:41,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:41,019 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:05:41,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:05:41,020 INFO L85 PathProgramCache]: Analyzing trace with hash 221324729, now seen corresponding path program 7 times [2025-02-05 10:05:41,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:05:41,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738594165] [2025-02-05 10:05:41,020 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:05:41,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:05:41,038 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-02-05 10:05:41,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-02-05 10:05:41,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:41,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 5 proven. 596 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 10:05:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:05:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738594165] [2025-02-05 10:05:54,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738594165] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:05:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709731094] [2025-02-05 10:05:54,910 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:05:54,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:05:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:05:54,912 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 10:05:54,915 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 10:05:54,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-02-05 10:05:55,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-02-05 10:05:55,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:05:55,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:05:55,273 WARN L254 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 238 conjuncts are in the unsatisfiable core [2025-02-05 10:05:55,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:05:55,330 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 10:05:56,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:56,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 248 treesize of output 136 [2025-02-05 10:05:56,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:56,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 307 treesize of output 158 [2025-02-05 10:05:56,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:56,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 291 treesize of output 158 [2025-02-05 10:05:56,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:56,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 291 treesize of output 158 [2025-02-05 10:05:57,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:57,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 291 treesize of output 158 [2025-02-05 10:05:57,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:57,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 291 treesize of output 158 [2025-02-05 10:05:57,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:57,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 291 treesize of output 158 [2025-02-05 10:05:57,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:57,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 291 treesize of output 158 [2025-02-05 10:05:57,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:57,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 291 treesize of output 158 [2025-02-05 10:05:57,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:57,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 291 treesize of output 158 [2025-02-05 10:05:57,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:57,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 311 treesize of output 171 [2025-02-05 10:05:58,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:05:58,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 510 treesize of output 150