./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:15:39,462 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:15:39,535 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:15:39,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:15:39,542 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:15:39,569 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:15:39,570 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:15:39,570 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:15:39,570 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:15:39,571 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:15:39,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:15:39,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:15:39,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:15:39,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:15:39,572 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:15:39,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:15:39,573 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:15:39,573 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:15:39,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:15:39,573 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:15:39,573 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:15:39,574 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:15:39,574 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:15:39,574 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:15:39,574 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:15:39,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:15:39,574 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:15:39,574 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:15:39,574 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:15:39,574 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:15:39,575 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:15:39,575 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:15:39,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:15:39,575 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:15:39,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:15:39,576 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 -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2025-02-07 20:15:39,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:15:39,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:15:39,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:15:39,840 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:15:39,840 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:15:39,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2025-02-07 20:15:41,087 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f96f184f0/88f1fb27b2344c189a5ff13d93b1e603/FLAG47ab28420 [2025-02-07 20:15:41,302 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:15:41,303 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2025-02-07 20:15:41,311 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f96f184f0/88f1fb27b2344c189a5ff13d93b1e603/FLAG47ab28420 [2025-02-07 20:15:41,324 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f96f184f0/88f1fb27b2344c189a5ff13d93b1e603 [2025-02-07 20:15:41,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:15:41,327 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:15:41,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:15:41,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:15:41,332 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:15:41,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@646f801f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41, skipping insertion in model container [2025-02-07 20:15:41,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,347 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:15:41,479 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2025-02-07 20:15:41,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:15:41,501 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:15:41,509 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2025-02-07 20:15:41,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:15:41,533 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:15:41,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41 WrapperNode [2025-02-07 20:15:41,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:15:41,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:15:41,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:15:41,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:15:41,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,561 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2025-02-07 20:15:41,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:15:41,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:15:41,564 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:15:41,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:15:41,571 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,573 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,584 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-07 20:15:41,585 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,585 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,592 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,593 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,594 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:15:41,599 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:15:41,599 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:15:41,599 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:15:41,600 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (1/1) ... [2025-02-07 20:15:41,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:15:41,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:41,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:15:41,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:15:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:15:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:15:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 20:15:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 20:15:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 20:15:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 20:15:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:15:41,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:15:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 20:15:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 20:15:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 20:15:41,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 20:15:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 20:15:41,724 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:15:41,726 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:15:41,845 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2025-02-07 20:15:41,845 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:15:41,854 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:15:41,854 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:15:41,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:15:41 BoogieIcfgContainer [2025-02-07 20:15:41,856 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:15:41,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:15:41,858 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:15:41,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:15:41,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:15:41" (1/3) ... [2025-02-07 20:15:41,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cee9202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:15:41, skipping insertion in model container [2025-02-07 20:15:41,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:41" (2/3) ... [2025-02-07 20:15:41,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cee9202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:15:41, skipping insertion in model container [2025-02-07 20:15:41,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:15:41" (3/3) ... [2025-02-07 20:15:41,865 INFO L128 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2025-02-07 20:15:41,878 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:15:41,880 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG simple_array_index_value_1-1.i that has 2 procedures, 17 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-07 20:15:41,929 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:15:41,941 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;@1c7eb48f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:15:41,942 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:15:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:15:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 20:15:41,950 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:41,950 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:15:41,950 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:41,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash -185501288, now seen corresponding path program 1 times [2025-02-07 20:15:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:41,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53721389] [2025-02-07 20:15:41,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:42,033 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 20:15:42,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:15:42,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:42,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:42,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53721389] [2025-02-07 20:15:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53721389] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:15:42,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:15:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 20:15:42,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125704436] [2025-02-07 20:15:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:15:42,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 20:15:42,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:42,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 20:15:42,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 20:15:42,224 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:15:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:42,284 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2025-02-07 20:15:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 20:15:42,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-07 20:15:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:42,293 INFO L225 Difference]: With dead ends: 38 [2025-02-07 20:15:42,294 INFO L226 Difference]: Without dead ends: 21 [2025-02-07 20:15:42,297 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 20:15:42,301 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:42,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:15:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-07 20:15:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2025-02-07 20:15:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:15:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-02-07 20:15:42,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2025-02-07 20:15:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:42,331 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-02-07 20:15:42,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:15:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-02-07 20:15:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 20:15:42,333 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:42,333 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:15:42,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:15:42,334 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:42,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1275466722, now seen corresponding path program 1 times [2025-02-07 20:15:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:42,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67854494] [2025-02-07 20:15:42,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:42,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:15:42,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:15:42,372 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:42,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:42,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:42,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67854494] [2025-02-07 20:15:42,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67854494] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:42,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314697243] [2025-02-07 20:15:42,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:42,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:42,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:42,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:42,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:15:42,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:15:42,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:15:42,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:42,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:42,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 20:15:42,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:42,635 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 11 treesize of output 7 [2025-02-07 20:15:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:42,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:15:43,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-02-07 20:15:43,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2025-02-07 20:15:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:43,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314697243] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:15:43,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:15:43,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 8] total 13 [2025-02-07 20:15:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568591496] [2025-02-07 20:15:43,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:15:43,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 20:15:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:43,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 20:15:43,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:15:43,081 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:15:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:43,311 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2025-02-07 20:15:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 20:15:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-07 20:15:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:43,312 INFO L225 Difference]: With dead ends: 47 [2025-02-07 20:15:43,313 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 20:15:43,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-02-07 20:15:43,316 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:43,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 72 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:15:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 20:15:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2025-02-07 20:15:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 20:15:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2025-02-07 20:15:43,327 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2025-02-07 20:15:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:43,327 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2025-02-07 20:15:43,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:15:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2025-02-07 20:15:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 20:15:43,330 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:43,330 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:15:43,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 20:15:43,530 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 [2025-02-07 20:15:43,531 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:43,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash 818667378, now seen corresponding path program 1 times [2025-02-07 20:15:43,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:43,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571833579] [2025-02-07 20:15:43,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:43,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:43,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:15:43,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:15:43,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:43,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 20:15:43,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:43,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571833579] [2025-02-07 20:15:43,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571833579] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:43,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91848360] [2025-02-07 20:15:43,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:43,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:43,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:43,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:43,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:15:43,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:15:43,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:15:43,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:43,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:43,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 20:15:43,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:43,756 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 13 treesize of output 9 [2025-02-07 20:15:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:43,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:15:48,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2025-02-07 20:15:48,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2025-02-07 20:15:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:48,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91848360] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:15:48,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:15:48,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 11] total 19 [2025-02-07 20:15:48,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211293390] [2025-02-07 20:15:48,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:15:48,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 20:15:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:48,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 20:15:48,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=276, Unknown=1, NotChecked=0, Total=342 [2025-02-07 20:15:48,346 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 20:15:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:48,998 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2025-02-07 20:15:48,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 20:15:48,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2025-02-07 20:15:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:48,999 INFO L225 Difference]: With dead ends: 71 [2025-02-07 20:15:48,999 INFO L226 Difference]: Without dead ends: 47 [2025-02-07 20:15:49,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=159, Invalid=596, Unknown=1, NotChecked=0, Total=756 [2025-02-07 20:15:49,001 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:49,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 107 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:15:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-07 20:15:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2025-02-07 20:15:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 20:15:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2025-02-07 20:15:49,014 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2025-02-07 20:15:49,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:49,014 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2025-02-07 20:15:49,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 20:15:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2025-02-07 20:15:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 20:15:49,015 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:49,015 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:15:49,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 20:15:49,215 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 [2025-02-07 20:15:49,215 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:49,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:49,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1626216128, now seen corresponding path program 1 times [2025-02-07 20:15:49,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:49,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960092631] [2025-02-07 20:15:49,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:49,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-07 20:15:49,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 20:15:49,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:49,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 20:15:49,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960092631] [2025-02-07 20:15:49,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960092631] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645101979] [2025-02-07 20:15:49,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:49,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:49,341 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:49,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:15:49,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-07 20:15:49,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 20:15:49,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:49,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:49,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 20:15:49,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:49,415 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 13 treesize of output 9 [2025-02-07 20:15:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:15:49,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:15:50,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2025-02-07 20:15:50,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2025-02-07 20:15:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:15:50,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645101979] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:15:50,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:15:50,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 13] total 23 [2025-02-07 20:15:50,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180154180] [2025-02-07 20:15:50,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:15:50,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 20:15:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:50,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 20:15:50,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2025-02-07 20:15:50,192 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 23 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 20:15:54,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-07 20:15:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:55,754 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2025-02-07 20:15:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 20:15:55,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2025-02-07 20:15:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:55,757 INFO L225 Difference]: With dead ends: 102 [2025-02-07 20:15:55,757 INFO L226 Difference]: Without dead ends: 70 [2025-02-07 20:15:55,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2025-02-07 20:15:55,758 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:55,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 159 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 325 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2025-02-07 20:15:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-02-07 20:15:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2025-02-07 20:15:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 51 states have internal predecessors, (56), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-07 20:15:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2025-02-07 20:15:55,783 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 29 [2025-02-07 20:15:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:55,783 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2025-02-07 20:15:55,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 20:15:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2025-02-07 20:15:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 20:15:55,784 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:55,784 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 20:15:55,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:15:55,985 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 [2025-02-07 20:15:55,985 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:55,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:55,986 INFO L85 PathProgramCache]: Analyzing trace with hash 798190932, now seen corresponding path program 2 times [2025-02-07 20:15:55,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:55,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938928999] [2025-02-07 20:15:55,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:15:55,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:55,993 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-02-07 20:15:56,022 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:15:56,022 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:15:56,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 20:15:56,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938928999] [2025-02-07 20:15:56,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938928999] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027709348] [2025-02-07 20:15:56,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:15:56,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:56,175 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:56,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:15:56,214 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-02-07 20:15:56,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:15:56,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:15:56,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:56,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-02-07 20:15:56,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:56,271 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 11 treesize of output 7 [2025-02-07 20:15:56,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 20:15:56,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 20:15:56,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 20:15:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:15:56,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:16:00,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 149 [2025-02-07 20:16:00,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 20:16:00,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1422 treesize of output 1390 [2025-02-07 20:16:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 20:16:00,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027709348] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:16:00,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:16:00,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 24] total 46 [2025-02-07 20:16:00,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867677897] [2025-02-07 20:16:00,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:16:00,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-02-07 20:16:00,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:16:00,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-02-07 20:16:00,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2025-02-07 20:16:00,558 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 46 states, 40 states have (on average 1.85) internal successors, (74), 44 states have internal predecessors, (74), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-07 20:16:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:16:07,109 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2025-02-07 20:16:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-07 20:16:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 1.85) internal successors, (74), 44 states have internal predecessors, (74), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2025-02-07 20:16:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:16:07,111 INFO L225 Difference]: With dead ends: 148 [2025-02-07 20:16:07,111 INFO L226 Difference]: Without dead ends: 91 [2025-02-07 20:16:07,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=878, Invalid=3952, Unknown=0, NotChecked=0, Total=4830 [2025-02-07 20:16:07,116 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 119 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:16:07,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 194 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-07 20:16:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-02-07 20:16:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2025-02-07 20:16:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-07 20:16:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2025-02-07 20:16:07,138 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 39 [2025-02-07 20:16:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:16:07,138 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2025-02-07 20:16:07,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 1.85) internal successors, (74), 44 states have internal predecessors, (74), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-07 20:16:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2025-02-07 20:16:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-07 20:16:07,140 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:16:07,140 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2025-02-07 20:16:07,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 20:16:07,344 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 [2025-02-07 20:16:07,344 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:16:07,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:16:07,344 INFO L85 PathProgramCache]: Analyzing trace with hash 879722014, now seen corresponding path program 3 times [2025-02-07 20:16:07,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:16:07,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570701966] [2025-02-07 20:16:07,345 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:16:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:16:07,351 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 5 equivalence classes. [2025-02-07 20:16:07,426 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 40 of 49 statements. [2025-02-07 20:16:07,427 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 20:16:07,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:16:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-02-07 20:16:07,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:16:07,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570701966] [2025-02-07 20:16:07,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570701966] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:16:07,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143456578] [2025-02-07 20:16:07,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:16:07,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:16:07,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:16:07,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:16:07,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:16:07,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 5 equivalence classes. [2025-02-07 20:16:07,745 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 40 of 49 statements. [2025-02-07 20:16:07,746 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 20:16:07,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:16:07,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-07 20:16:07,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:16:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 20:16:07,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:16:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-02-07 20:16:07,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143456578] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:16:07,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:16:07,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-02-07 20:16:07,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081952808] [2025-02-07 20:16:07,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:16:07,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 20:16:07,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:16:07,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 20:16:07,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2025-02-07 20:16:07,873 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:16:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:16:08,324 INFO L93 Difference]: Finished difference Result 204 states and 250 transitions. [2025-02-07 20:16:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 20:16:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2025-02-07 20:16:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:16:08,327 INFO L225 Difference]: With dead ends: 204 [2025-02-07 20:16:08,327 INFO L226 Difference]: Without dead ends: 140 [2025-02-07 20:16:08,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:16:08,328 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:16:08,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 143 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:16:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-02-07 20:16:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 88. [2025-02-07 20:16:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 72 states have internal predecessors, (77), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-07 20:16:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2025-02-07 20:16:08,358 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 49 [2025-02-07 20:16:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:16:08,359 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2025-02-07 20:16:08,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:16:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2025-02-07 20:16:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-07 20:16:08,360 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:16:08,360 INFO L218 NwaCegarLoop]: trace histogram [12, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2025-02-07 20:16:08,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 20:16:08,560 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 [2025-02-07 20:16:08,561 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:16:08,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:16:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2069150420, now seen corresponding path program 4 times [2025-02-07 20:16:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:16:08,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852191176] [2025-02-07 20:16:08,561 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:16:08,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:16:08,573 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-02-07 20:16:08,606 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 20:16:08,607 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:16:08,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:16:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-02-07 20:16:08,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:16:08,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852191176] [2025-02-07 20:16:08,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852191176] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:16:08,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426633797] [2025-02-07 20:16:08,955 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:16:08,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:16:08,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:16:08,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:16:08,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 20:16:08,992 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-02-07 20:16:09,040 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 20:16:09,040 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:16:09,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:16:09,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-07 20:16:09,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:16:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 20:16:09,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:16:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-02-07 20:16:09,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426633797] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:16:09,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:16:09,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 29 [2025-02-07 20:16:09,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769319205] [2025-02-07 20:16:09,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:16:09,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 20:16:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:16:09,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 20:16:09,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2025-02-07 20:16:09,345 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:16:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:16:14,393 INFO L93 Difference]: Finished difference Result 337 states and 436 transitions. [2025-02-07 20:16:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-07 20:16:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2025-02-07 20:16:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:16:14,396 INFO L225 Difference]: With dead ends: 337 [2025-02-07 20:16:14,396 INFO L226 Difference]: Without dead ends: 263 [2025-02-07 20:16:14,397 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 20:16:14,397 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 695 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-07 20:16:14,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 461 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-07 20:16:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2025-02-07 20:16:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 137. [2025-02-07 20:16:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 113 states have (on average 1.0530973451327434) internal successors, (119), 114 states have internal predecessors, (119), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-07 20:16:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2025-02-07 20:16:14,443 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 56 [2025-02-07 20:16:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:16:14,443 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2025-02-07 20:16:14,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:16:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2025-02-07 20:16:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-02-07 20:16:14,444 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:16:14,444 INFO L218 NwaCegarLoop]: trace histogram [26, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2025-02-07 20:16:14,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 20:16:14,644 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 [2025-02-07 20:16:14,645 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:16:14,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:16:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1517530004, now seen corresponding path program 5 times [2025-02-07 20:16:14,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:16:14,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895587807] [2025-02-07 20:16:14,645 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:16:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:16:14,659 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 70 statements into 14 equivalence classes. [2025-02-07 20:16:15,229 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 70 of 70 statements. [2025-02-07 20:16:15,229 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-02-07 20:16:15,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:16:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 8 proven. 351 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-02-07 20:16:16,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:16:16,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895587807] [2025-02-07 20:16:16,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895587807] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:16:16,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663072280] [2025-02-07 20:16:16,132 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:16:16,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:16:16,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:16:16,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:16:16,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 20:16:16,180 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 70 statements into 14 equivalence classes.