./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep20-1.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/reducercommutativity/sep20-1.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 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 16:56:14,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 16:56:14,620 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 16:56:14,625 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 16:56:14,625 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 16:56:14,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 16:56:14,651 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 16:56:14,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 16:56:14,651 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 16:56:14,651 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 16:56:14,651 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 16:56:14,651 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 16:56:14,651 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 16:56:14,651 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 16:56:14,651 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 16:56:14,651 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 16:56:14,652 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:56:14,652 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 16:56:14,652 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 16:56:14,653 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 16:56:14,653 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 16:56:14,653 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 16:56:14,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 16:56:14,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 16:56:14,653 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 16:56:14,653 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 16:56:14,653 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 16:56:14,653 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 -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2025-02-07 16:56:14,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 16:56:14,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 16:56:14,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 16:56:14,901 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 16:56:14,901 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 16:56:14,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep20-1.i [2025-02-07 16:56:15,950 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4860abf73/ec1502ed358045029716b7eee67e2bee/FLAGfd47cdeed [2025-02-07 16:56:16,144 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 16:56:16,147 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i [2025-02-07 16:56:16,180 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4860abf73/ec1502ed358045029716b7eee67e2bee/FLAGfd47cdeed [2025-02-07 16:56:16,506 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4860abf73/ec1502ed358045029716b7eee67e2bee [2025-02-07 16:56:16,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 16:56:16,508 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 16:56:16,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 16:56:16,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 16:56:16,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 16:56:16,512 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,513 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c038904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16, skipping insertion in model container [2025-02-07 16:56:16,513 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,521 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 16:56:16,621 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2025-02-07 16:56:16,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:56:16,632 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 16:56:16,643 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2025-02-07 16:56:16,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:56:16,651 INFO L204 MainTranslator]: Completed translation [2025-02-07 16:56:16,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16 WrapperNode [2025-02-07 16:56:16,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 16:56:16,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 16:56:16,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 16:56:16,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 16:56:16,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,672 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2025-02-07 16:56:16,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 16:56:16,673 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 16:56:16,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 16:56:16,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 16:56:16,677 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,683 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,690 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2025-02-07 16:56:16,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,697 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,697 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,698 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 16:56:16,700 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 16:56:16,700 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 16:56:16,700 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 16:56:16,701 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (1/1) ... [2025-02-07 16:56:16,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:56:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:16,726 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 16:56:16,728 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 16:56:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 16:56:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 16:56:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 16:56:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 16:56:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 16:56:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 16:56:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 16:56:16,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 16:56:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 16:56:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 16:56:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 16:56:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2025-02-07 16:56:16,747 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2025-02-07 16:56:16,795 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 16:56:16,796 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 16:56:16,892 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L31: call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset; [2025-02-07 16:56:16,916 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-02-07 16:56:16,916 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 16:56:16,922 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 16:56:16,922 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 16:56:16,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:56:16 BoogieIcfgContainer [2025-02-07 16:56:16,923 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 16:56:16,925 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 16:56:16,925 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 16:56:16,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 16:56:16,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 04:56:16" (1/3) ... [2025-02-07 16:56:16,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44419c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:56:16, skipping insertion in model container [2025-02-07 16:56:16,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:56:16" (2/3) ... [2025-02-07 16:56:16,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44419c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:56:16, skipping insertion in model container [2025-02-07 16:56:16,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:56:16" (3/3) ... [2025-02-07 16:56:16,929 INFO L128 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2025-02-07 16:56:16,938 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 16:56:16,939 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sep20-1.i that has 2 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-07 16:56:16,967 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 16:56:16,974 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;@3c5d350e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 16:56:16,974 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 16:56:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 16:56:16,980 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:16,980 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:16,980 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:16,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:16,983 INFO L85 PathProgramCache]: Analyzing trace with hash -820940516, now seen corresponding path program 1 times [2025-02-07 16:56:16,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:16,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140907406] [2025-02-07 16:56:16,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:17,055 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 16:56:17,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 16:56:17,070 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:17,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 16:56:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140907406] [2025-02-07 16:56:17,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140907406] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:56:17,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:56:17,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 16:56:17,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092904666] [2025-02-07 16:56:17,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:56:17,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:56:17,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:17,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:56:17,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:56:17,182 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-07 16:56:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:17,197 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2025-02-07 16:56:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:56:17,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2025-02-07 16:56:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:17,202 INFO L225 Difference]: With dead ends: 43 [2025-02-07 16:56:17,202 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 16:56:17,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:56:17,205 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:17,206 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 16:56:17,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-02-07 16:56:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2025-02-07 16:56:17,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 23 [2025-02-07 16:56:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:17,225 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2025-02-07 16:56:17,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-07 16:56:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2025-02-07 16:56:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 16:56:17,226 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:17,226 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:17,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 16:56:17,227 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:17,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:17,227 INFO L85 PathProgramCache]: Analyzing trace with hash -987061845, now seen corresponding path program 1 times [2025-02-07 16:56:17,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:17,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414294130] [2025-02-07 16:56:17,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:17,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:17,241 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-07 16:56:17,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 16:56:17,253 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:17,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 16:56:17,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:17,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414294130] [2025-02-07 16:56:17,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414294130] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:17,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446639851] [2025-02-07 16:56:17,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:17,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:17,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:17,347 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 16:56:17,348 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 16:56:17,386 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-07 16:56:17,405 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 16:56:17,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:17,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:17,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-07 16:56:17,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-07 16:56:17,422 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 16:56:17,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446639851] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:56:17,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 16:56:17,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-02-07 16:56:17,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904155267] [2025-02-07 16:56:17,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:56:17,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:56:17,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:17,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:56:17,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:56:17,424 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 16:56:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:17,432 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2025-02-07 16:56:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:56:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2025-02-07 16:56:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:17,433 INFO L225 Difference]: With dead ends: 37 [2025-02-07 16:56:17,433 INFO L226 Difference]: Without dead ends: 22 [2025-02-07 16:56:17,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:56:17,434 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:17,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-02-07 16:56:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2025-02-07 16:56:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2025-02-07 16:56:17,437 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 24 [2025-02-07 16:56:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:17,437 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2025-02-07 16:56:17,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 16:56:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2025-02-07 16:56:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 16:56:17,438 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:17,438 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:17,450 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 16:56:17,638 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 16:56:17,639 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:17,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 695856718, now seen corresponding path program 1 times [2025-02-07 16:56:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146597495] [2025-02-07 16:56:17,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:17,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-07 16:56:17,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 16:56:17,660 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:17,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 16:56:17,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:17,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146597495] [2025-02-07 16:56:17,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146597495] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:17,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882766983] [2025-02-07 16:56:17,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:17,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:17,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:17,751 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 16:56:17,757 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 16:56:17,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-07 16:56:17,828 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 16:56:17,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:17,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:17,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-07 16:56:17,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-07 16:56:17,856 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 16:56:17,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882766983] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:56:17,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 16:56:17,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-02-07 16:56:17,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91386347] [2025-02-07 16:56:17,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:56:17,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:56:17,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:17,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:56:17,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:56:17,862 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 16:56:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:17,872 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2025-02-07 16:56:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:56:17,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2025-02-07 16:56:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:17,877 INFO L225 Difference]: With dead ends: 33 [2025-02-07 16:56:17,877 INFO L226 Difference]: Without dead ends: 21 [2025-02-07 16:56:17,877 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:56:17,877 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:17,878 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-07 16:56:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-02-07 16:56:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:17,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2025-02-07 16:56:17,880 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 33 [2025-02-07 16:56:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:17,885 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2025-02-07 16:56:17,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 16:56:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2025-02-07 16:56:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 16:56:17,886 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:17,886 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:17,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 16:56:18,086 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 16:56:18,087 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:18,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1250811837, now seen corresponding path program 1 times [2025-02-07 16:56:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989705680] [2025-02-07 16:56:18,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:18,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 16:56:18,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 16:56:18,100 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:18,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-07 16:56:18,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:18,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989705680] [2025-02-07 16:56:18,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989705680] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:18,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557907081] [2025-02-07 16:56:18,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:18,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:18,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:18,168 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 16:56:18,170 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 16:56:18,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 16:56:18,224 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 16:56:18,224 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:18,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:18,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-07 16:56:18,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-07 16:56:18,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-07 16:56:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557907081] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:18,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:18,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2025-02-07 16:56:18,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822423231] [2025-02-07 16:56:18,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:18,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 16:56:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:18,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 16:56:18,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-07 16:56:18,287 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-07 16:56:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:18,308 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2025-02-07 16:56:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 16:56:18,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 34 [2025-02-07 16:56:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:18,308 INFO L225 Difference]: With dead ends: 42 [2025-02-07 16:56:18,308 INFO L226 Difference]: Without dead ends: 24 [2025-02-07 16:56:18,309 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-07 16:56:18,309 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:18,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-07 16:56:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-07 16:56:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2025-02-07 16:56:18,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 34 [2025-02-07 16:56:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:18,315 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2025-02-07 16:56:18,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-07 16:56:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2025-02-07 16:56:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 16:56:18,316 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:18,316 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:18,323 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 16:56:18,516 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 16:56:18,517 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:18,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:18,517 INFO L85 PathProgramCache]: Analyzing trace with hash -162770514, now seen corresponding path program 2 times [2025-02-07 16:56:18,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:18,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455368193] [2025-02-07 16:56:18,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:56:18,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:18,526 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-07 16:56:18,540 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 16:56:18,540 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:56:18,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 16:56:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455368193] [2025-02-07 16:56:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455368193] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669318782] [2025-02-07 16:56:18,609 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:56:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:18,611 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 16:56:18,614 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 16:56:18,652 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-07 16:56:18,675 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 16:56:18,675 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:56:18,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:18,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 16:56:18,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-07 16:56:18,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-07 16:56:18,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669318782] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:18,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:18,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2025-02-07 16:56:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853517098] [2025-02-07 16:56:18,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:18,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 16:56:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:18,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 16:56:18,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-02-07 16:56:18,774 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 16:56:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:18,796 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2025-02-07 16:56:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 16:56:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2025-02-07 16:56:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:18,797 INFO L225 Difference]: With dead ends: 53 [2025-02-07 16:56:18,797 INFO L226 Difference]: Without dead ends: 35 [2025-02-07 16:56:18,797 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-02-07 16:56:18,798 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:18,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-07 16:56:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2025-02-07 16:56:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2025-02-07 16:56:18,800 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2025-02-07 16:56:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:18,801 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2025-02-07 16:56:18,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 16:56:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2025-02-07 16:56:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-02-07 16:56:18,801 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:18,801 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:18,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 16:56:19,002 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 16:56:19,002 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:19,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1775175243, now seen corresponding path program 3 times [2025-02-07 16:56:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:19,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319793588] [2025-02-07 16:56:19,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:56:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:19,021 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 52 statements into 6 equivalence classes. [2025-02-07 16:56:19,047 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 52 statements. [2025-02-07 16:56:19,048 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 16:56:19,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-02-07 16:56:19,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319793588] [2025-02-07 16:56:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319793588] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518665915] [2025-02-07 16:56:19,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:56:19,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:19,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:19,130 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 16:56:19,132 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 16:56:19,174 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 52 statements into 6 equivalence classes. [2025-02-07 16:56:19,192 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 52 statements. [2025-02-07 16:56:19,192 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 16:56:19,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:19,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-07 16:56:19,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-07 16:56:19,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-02-07 16:56:19,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518665915] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:19,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:19,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 16:56:19,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845696008] [2025-02-07 16:56:19,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:19,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 16:56:19,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:19,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 16:56:19,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-07 16:56:19,224 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 16:56:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:19,234 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2025-02-07 16:56:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 16:56:19,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2025-02-07 16:56:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:19,234 INFO L225 Difference]: With dead ends: 51 [2025-02-07 16:56:19,234 INFO L226 Difference]: Without dead ends: 36 [2025-02-07 16:56:19,234 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-07 16:56:19,235 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:19,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-07 16:56:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-02-07 16:56:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2025-02-07 16:56:19,238 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 52 [2025-02-07 16:56:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:19,238 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2025-02-07 16:56:19,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 16:56:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2025-02-07 16:56:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-07 16:56:19,239 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:19,239 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:19,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 16:56:19,442 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 16:56:19,443 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:19,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash 82339548, now seen corresponding path program 4 times [2025-02-07 16:56:19,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:19,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277891507] [2025-02-07 16:56:19,443 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:56:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:19,464 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-07 16:56:19,491 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 16:56:19,491 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:56:19,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-02-07 16:56:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277891507] [2025-02-07 16:56:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277891507] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380778583] [2025-02-07 16:56:19,556 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:56:19,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:19,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:19,558 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 16:56:19,561 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 16:56:19,609 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-07 16:56:19,641 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 16:56:19,641 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:56:19,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:19,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 16:56:19,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2025-02-07 16:56:19,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-02-07 16:56:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380778583] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:19,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 16:56:19,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509384202] [2025-02-07 16:56:19,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:19,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 16:56:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:19,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 16:56:19,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-02-07 16:56:19,686 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 16:56:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:19,703 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2025-02-07 16:56:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 16:56:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2025-02-07 16:56:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:19,708 INFO L225 Difference]: With dead ends: 71 [2025-02-07 16:56:19,708 INFO L226 Difference]: Without dead ends: 48 [2025-02-07 16:56:19,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-02-07 16:56:19,708 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:19,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-07 16:56:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-02-07 16:56:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2025-02-07 16:56:19,712 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 55 [2025-02-07 16:56:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:19,712 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2025-02-07 16:56:19,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 16:56:19,712 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2025-02-07 16:56:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-02-07 16:56:19,713 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:19,713 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:19,719 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 16:56:19,913 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 16:56:19,913 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:19,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1192419356, now seen corresponding path program 5 times [2025-02-07 16:56:19,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:19,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516744733] [2025-02-07 16:56:19,914 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:56:19,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:19,933 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 91 statements into 14 equivalence classes. [2025-02-07 16:56:20,072 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 81 of 91 statements. [2025-02-07 16:56:20,074 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-07 16:56:20,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 123 proven. 174 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2025-02-07 16:56:20,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:20,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516744733] [2025-02-07 16:56:20,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516744733] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:20,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957177853] [2025-02-07 16:56:20,290 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:56:20,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:20,292 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 16:56:20,294 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 16:56:20,357 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 91 statements into 14 equivalence classes. [2025-02-07 16:56:20,508 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 81 of 91 statements. [2025-02-07 16:56:20,508 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-07 16:56:20,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:20,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 16:56:20,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2025-02-07 16:56:20,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2025-02-07 16:56:20,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957177853] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:20,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-02-07 16:56:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45023879] [2025-02-07 16:56:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:20,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-07 16:56:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:20,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-07 16:56:20,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-02-07 16:56:20,666 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 16:56:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:20,718 INFO L93 Difference]: Finished difference Result 107 states and 144 transitions. [2025-02-07 16:56:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 16:56:20,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2025-02-07 16:56:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:20,721 INFO L225 Difference]: With dead ends: 107 [2025-02-07 16:56:20,721 INFO L226 Difference]: Without dead ends: 72 [2025-02-07 16:56:20,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-02-07 16:56:20,722 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:20,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 132 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-02-07 16:56:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2025-02-07 16:56:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2025-02-07 16:56:20,733 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 91 [2025-02-07 16:56:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:20,733 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2025-02-07 16:56:20,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 16:56:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2025-02-07 16:56:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2025-02-07 16:56:20,734 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:20,734 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:20,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-07 16:56:20,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:20,938 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:20,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1337101668, now seen corresponding path program 6 times [2025-02-07 16:56:20,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:20,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911535266] [2025-02-07 16:56:20,938 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 16:56:20,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:20,975 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 163 statements into 30 equivalence classes. [2025-02-07 16:56:21,002 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 51 of 163 statements. [2025-02-07 16:56:21,002 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 16:56:21,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-02-07 16:56:21,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:21,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911535266] [2025-02-07 16:56:21,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911535266] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:21,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578178564] [2025-02-07 16:56:21,103 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 16:56:21,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:21,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:21,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:56:21,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 16:56:21,180 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 163 statements into 30 equivalence classes. [2025-02-07 16:56:21,215 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 51 of 163 statements. [2025-02-07 16:56:21,215 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 16:56:21,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:21,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 16:56:21,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 1240 proven. 10 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2025-02-07 16:56:21,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-02-07 16:56:21,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578178564] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:21,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:21,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-07 16:56:21,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740473787] [2025-02-07 16:56:21,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:21,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 16:56:21,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:21,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 16:56:21,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2025-02-07 16:56:21,331 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 16:56:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:21,353 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2025-02-07 16:56:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 16:56:21,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 163 [2025-02-07 16:56:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:21,354 INFO L225 Difference]: With dead ends: 129 [2025-02-07 16:56:21,354 INFO L226 Difference]: Without dead ends: 78 [2025-02-07 16:56:21,355 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2025-02-07 16:56:21,355 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:21,355 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-02-07 16:56:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-02-07 16:56:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2025-02-07 16:56:21,360 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 163 [2025-02-07 16:56:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:21,360 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2025-02-07 16:56:21,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 16:56:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2025-02-07 16:56:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2025-02-07 16:56:21,361 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:21,361 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:21,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-07 16:56:21,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:21,566 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:21,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1003715644, now seen corresponding path program 7 times [2025-02-07 16:56:21,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:21,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129165957] [2025-02-07 16:56:21,567 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 16:56:21,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:21,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 169 statements into 1 equivalence classes. [2025-02-07 16:56:21,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 169 of 169 statements. [2025-02-07 16:56:21,674 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:21,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-02-07 16:56:22,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:22,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129165957] [2025-02-07 16:56:22,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129165957] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:22,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833785306] [2025-02-07 16:56:22,288 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 16:56:22,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:22,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:22,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:56:22,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 16:56:22,399 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 169 statements into 1 equivalence classes. [2025-02-07 16:56:22,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 169 of 169 statements. [2025-02-07 16:56:22,478 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:22,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:22,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 16:56:22,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-02-07 16:56:22,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-02-07 16:56:22,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833785306] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:22,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:22,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 23 [2025-02-07 16:56:22,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104044533] [2025-02-07 16:56:22,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:22,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 16:56:22,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:22,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 16:56:22,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-02-07 16:56:22,687 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-07 16:56:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:22,711 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2025-02-07 16:56:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 16:56:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 169 [2025-02-07 16:56:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:22,714 INFO L225 Difference]: With dead ends: 154 [2025-02-07 16:56:22,714 INFO L226 Difference]: Without dead ends: 88 [2025-02-07 16:56:22,715 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 326 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-02-07 16:56:22,715 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:22,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-02-07 16:56:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2025-02-07 16:56:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2025-02-07 16:56:22,724 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 169 [2025-02-07 16:56:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:22,724 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2025-02-07 16:56:22,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-07 16:56:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2025-02-07 16:56:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2025-02-07 16:56:22,727 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:22,727 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:22,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 16:56:22,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:22,928 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:22,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:22,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1095929244, now seen corresponding path program 8 times [2025-02-07 16:56:22,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:22,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698329877] [2025-02-07 16:56:22,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:56:22,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:22,960 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 179 statements into 2 equivalence classes. [2025-02-07 16:56:22,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 179 of 179 statements. [2025-02-07 16:56:22,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:56:22,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2986 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2025-02-07 16:56:23,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:23,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698329877] [2025-02-07 16:56:23,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698329877] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:23,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179473810] [2025-02-07 16:56:23,475 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:56:23,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:23,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:23,478 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:56:23,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 16:56:23,575 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 179 statements into 2 equivalence classes. [2025-02-07 16:56:23,669 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 179 of 179 statements. [2025-02-07 16:56:23,669 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:56:23,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:23,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 16:56:23,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2986 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 1463 trivial. 0 not checked. [2025-02-07 16:56:23,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2986 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2025-02-07 16:56:23,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179473810] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:23,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:23,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2025-02-07 16:56:23,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575557023] [2025-02-07 16:56:23,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:23,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 16:56:23,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:23,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 16:56:23,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-02-07 16:56:23,953 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 16:56:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:24,004 INFO L93 Difference]: Finished difference Result 171 states and 220 transitions. [2025-02-07 16:56:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 16:56:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2025-02-07 16:56:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:24,005 INFO L225 Difference]: With dead ends: 171 [2025-02-07 16:56:24,005 INFO L226 Difference]: Without dead ends: 106 [2025-02-07 16:56:24,005 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 342 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-02-07 16:56:24,006 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:24,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 144 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-02-07 16:56:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2025-02-07 16:56:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 101 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2025-02-07 16:56:24,020 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 179 [2025-02-07 16:56:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:24,020 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2025-02-07 16:56:24,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 16:56:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2025-02-07 16:56:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2025-02-07 16:56:24,022 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:24,022 INFO L218 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:24,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 16:56:24,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:24,223 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:24,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash 293267324, now seen corresponding path program 9 times [2025-02-07 16:56:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:24,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597888639] [2025-02-07 16:56:24,224 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:56:24,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:24,259 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 233 statements into 42 equivalence classes. [2025-02-07 16:56:24,364 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 72 of 233 statements. [2025-02-07 16:56:24,366 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 16:56:24,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5767 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5712 trivial. 0 not checked. [2025-02-07 16:56:24,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597888639] [2025-02-07 16:56:24,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597888639] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717806537] [2025-02-07 16:56:24,535 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:56:24,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:24,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:56:24,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 16:56:24,657 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 233 statements into 42 equivalence classes. [2025-02-07 16:56:24,851 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 72 of 233 statements. [2025-02-07 16:56:24,851 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 16:56:24,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:24,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 16:56:24,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5767 backedges. 2488 proven. 55 refuted. 0 times theorem prover too weak. 3224 trivial. 0 not checked. [2025-02-07 16:56:24,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5767 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5712 trivial. 0 not checked. [2025-02-07 16:56:25,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717806537] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:25,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:25,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2025-02-07 16:56:25,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119003707] [2025-02-07 16:56:25,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:25,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-07 16:56:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:25,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-07 16:56:25,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2025-02-07 16:56:25,012 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 16:56:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:25,033 INFO L93 Difference]: Finished difference Result 184 states and 237 transitions. [2025-02-07 16:56:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 16:56:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 233 [2025-02-07 16:56:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:25,034 INFO L225 Difference]: With dead ends: 184 [2025-02-07 16:56:25,034 INFO L226 Difference]: Without dead ends: 115 [2025-02-07 16:56:25,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 454 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2025-02-07 16:56:25,035 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:25,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:56:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-02-07 16:56:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2025-02-07 16:56:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.209090909090909) internal successors, (133), 110 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-07 16:56:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2025-02-07 16:56:25,040 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 233 [2025-02-07 16:56:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:25,040 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2025-02-07 16:56:25,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 16:56:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2025-02-07 16:56:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2025-02-07 16:56:25,042 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:25,042 INFO L218 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:25,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 16:56:25,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 16:56:25,246 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:25,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -570533909, now seen corresponding path program 10 times [2025-02-07 16:56:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:25,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668659582] [2025-02-07 16:56:25,247 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:56:25,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:25,272 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 242 statements into 2 equivalence classes. [2025-02-07 16:56:25,849 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 242 of 242 statements. [2025-02-07 16:56:25,849 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:56:25,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 0 proven. 5415 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2025-02-07 16:56:30,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:30,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668659582] [2025-02-07 16:56:30,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668659582] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:30,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534782903] [2025-02-07 16:56:30,803 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:56:30,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:30,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:30,805 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:56:30,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 16:56:30,919 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 242 statements into 2 equivalence classes. [2025-02-07 16:56:31,062 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 242 of 242 statements. [2025-02-07 16:56:31,062 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:56:31,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:31,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 307 conjuncts are in the unsatisfiable core [2025-02-07 16:56:31,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2025-02-07 16:56:32,954 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2025-02-07 16:56:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534782903] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:35,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:35,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 70, 30] total 104 [2025-02-07 16:56:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156259255] [2025-02-07 16:56:35,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:35,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2025-02-07 16:56:35,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:35,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2025-02-07 16:56:35,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=10380, Unknown=0, NotChecked=0, Total=10712 [2025-02-07 16:56:35,166 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand has 104 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 98 states have internal predecessors, (211), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2025-02-07 16:56:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:37,655 INFO L93 Difference]: Finished difference Result 553 states and 728 transitions. [2025-02-07 16:56:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2025-02-07 16:56:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 98 states have internal predecessors, (211), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 242 [2025-02-07 16:56:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:37,659 INFO L225 Difference]: With dead ends: 553 [2025-02-07 16:56:37,659 INFO L226 Difference]: Without dead ends: 549 [2025-02-07 16:56:37,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=350, Invalid=10780, Unknown=0, NotChecked=0, Total=11130 [2025-02-07 16:56:37,663 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 7704 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 7755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 7704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:37,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1139 Invalid, 7755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 7704 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2025-02-07 16:56:37,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2025-02-07 16:56:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 521. [2025-02-07 16:56:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 513 states have (on average 1.3216374269005848) internal successors, (678), 514 states have internal predecessors, (678), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2025-02-07 16:56:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 692 transitions. [2025-02-07 16:56:37,699 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 692 transitions. Word has length 242 [2025-02-07 16:56:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:37,701 INFO L471 AbstractCegarLoop]: Abstraction has 521 states and 692 transitions. [2025-02-07 16:56:37,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 98 states have internal predecessors, (211), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2025-02-07 16:56:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 692 transitions. [2025-02-07 16:56:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2025-02-07 16:56:37,708 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:37,708 INFO L218 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:37,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 16:56:37,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:37,909 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:37,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1172276426, now seen corresponding path program 1 times [2025-02-07 16:56:37,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:37,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168412399] [2025-02-07 16:56:37,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:37,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 242 statements into 1 equivalence classes. [2025-02-07 16:56:39,099 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 242 of 242 statements. [2025-02-07 16:56:39,099 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:39,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 2486 proven. 2155 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2025-02-07 16:56:44,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:56:44,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168412399] [2025-02-07 16:56:44,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168412399] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:56:44,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287095550] [2025-02-07 16:56:44,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:56:44,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:44,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:56:44,688 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:56:44,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 16:56:44,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 242 statements into 1 equivalence classes. [2025-02-07 16:56:45,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 242 of 242 statements. [2025-02-07 16:56:45,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:56:45,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:56:45,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 113 conjuncts are in the unsatisfiable core [2025-02-07 16:56:45,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:56:45,307 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 17 treesize of output 9 [2025-02-07 16:56:45,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 16:56:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 2489 proven. 2080 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2025-02-07 16:56:47,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:56:49,185 INFO L349 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2025-02-07 16:56:49,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2025-02-07 16:56:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 2544 proven. 1814 refuted. 0 times theorem prover too weak. 1544 trivial. 0 not checked. [2025-02-07 16:56:49,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287095550] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:56:49,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:56:49,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 30] total 105 [2025-02-07 16:56:49,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849851476] [2025-02-07 16:56:49,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:56:49,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2025-02-07 16:56:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:56:49,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2025-02-07 16:56:49,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=10564, Unknown=0, NotChecked=0, Total=10920 [2025-02-07 16:56:49,289 INFO L87 Difference]: Start difference. First operand 521 states and 692 transitions. Second operand has 105 states, 103 states have (on average 2.4757281553398056) internal successors, (255), 102 states have internal predecessors, (255), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-07 16:56:58,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:56:58,078 INFO L93 Difference]: Finished difference Result 1338 states and 1835 transitions. [2025-02-07 16:56:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2025-02-07 16:56:58,078 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 2.4757281553398056) internal successors, (255), 102 states have internal predecessors, (255), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 242 [2025-02-07 16:56:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:56:58,083 INFO L225 Difference]: With dead ends: 1338 [2025-02-07 16:56:58,083 INFO L226 Difference]: Without dead ends: 1247 [2025-02-07 16:56:58,088 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 491 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6732 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1240, Invalid=30980, Unknown=0, NotChecked=0, Total=32220 [2025-02-07 16:56:58,088 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 301 mSDsluCounter, 5195 mSDsCounter, 0 mSdLazyCounter, 9048 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 5289 SdHoareTripleChecker+Invalid, 9060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 9048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:56:58,088 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 5289 Invalid, 9060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 9048 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2025-02-07 16:56:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2025-02-07 16:56:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1055. [2025-02-07 16:56:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1043 states have (on average 1.3317353787152444) internal successors, (1389), 1046 states have internal predecessors, (1389), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2025-02-07 16:56:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1410 transitions. [2025-02-07 16:56:58,158 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1410 transitions. Word has length 242 [2025-02-07 16:56:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:56:58,158 INFO L471 AbstractCegarLoop]: Abstraction has 1055 states and 1410 transitions. [2025-02-07 16:56:58,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 2.4757281553398056) internal successors, (255), 102 states have internal predecessors, (255), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-07 16:56:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1410 transitions. [2025-02-07 16:56:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2025-02-07 16:56:58,164 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:56:58,164 INFO L218 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:56:58,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-07 16:56:58,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:56:58,368 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:56:58,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:56:58,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1927482028, now seen corresponding path program 2 times [2025-02-07 16:56:58,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:56:58,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292030176] [2025-02-07 16:56:58,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:56:58,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:56:58,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 242 statements into 2 equivalence classes. [2025-02-07 16:56:59,581 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 242 of 242 statements. [2025-02-07 16:56:59,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:56:59,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:57:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 67 proven. 5664 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2025-02-07 16:57:07,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:57:07,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292030176] [2025-02-07 16:57:07,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292030176] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:57:07,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577233454] [2025-02-07 16:57:07,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:57:07,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:57:07,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:57:07,864 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:57:07,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 16:57:08,016 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 242 statements into 2 equivalence classes. [2025-02-07 16:57:08,286 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 242 of 242 statements. [2025-02-07 16:57:08,286 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:57:08,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:57:08,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 227 conjuncts are in the unsatisfiable core [2025-02-07 16:57:08,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:57:08,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 16:57:08,360 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 22 treesize of output 7 [2025-02-07 16:57:09,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:09,609 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 25 treesize of output 27 [2025-02-07 16:57:09,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:09,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:09,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:09,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:09,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:09,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:09,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:09,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:10,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:10,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:11,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:11,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2025-02-07 16:57:11,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:11,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2025-02-07 16:57:11,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:57:11,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2025-02-07 16:57:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 2543 proven. 2766 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2025-02-07 16:57:13,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:57:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 2618 proven. 2479 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2025-02-07 16:57:22,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577233454] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:57:22,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:57:22,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 89, 66] total 196 [2025-02-07 16:57:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000327319] [2025-02-07 16:57:22,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:57:22,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2025-02-07 16:57:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:57:22,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2025-02-07 16:57:22,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=37065, Unknown=0, NotChecked=0, Total=38220 [2025-02-07 16:57:22,635 INFO L87 Difference]: Start difference. First operand 1055 states and 1410 transitions. Second operand has 196 states, 196 states have (on average 2.13265306122449) internal successors, (418), 194 states have internal predecessors, (418), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2025-02-07 16:57:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:57:36,676 INFO L93 Difference]: Finished difference Result 4468 states and 6125 transitions. [2025-02-07 16:57:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2025-02-07 16:57:36,677 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 2.13265306122449) internal successors, (418), 194 states have internal predecessors, (418), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 242 [2025-02-07 16:57:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:57:36,689 INFO L225 Difference]: With dead ends: 4468 [2025-02-07 16:57:36,689 INFO L226 Difference]: Without dead ends: 3125 [2025-02-07 16:57:36,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15697 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=2553, Invalid=55287, Unknown=0, NotChecked=0, Total=57840 [2025-02-07 16:57:36,698 INFO L435 NwaCegarLoop]: 134 mSDtfsCounter, 273 mSDsluCounter, 12445 mSDsCounter, 0 mSdLazyCounter, 21897 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 12579 SdHoareTripleChecker+Invalid, 21951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 21897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2025-02-07 16:57:36,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 12579 Invalid, 21951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 21897 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2025-02-07 16:57:36,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2025-02-07 16:57:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2171. [2025-02-07 16:57:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2148 states have (on average 1.3314711359404097) internal successors, (2860), 2154 states have internal predecessors, (2860), 11 states have call successors, (11), 5 states have call predecessors, (11), 11 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2025-02-07 16:57:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 2908 transitions. [2025-02-07 16:57:36,838 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 2908 transitions. Word has length 242 [2025-02-07 16:57:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:57:36,839 INFO L471 AbstractCegarLoop]: Abstraction has 2171 states and 2908 transitions. [2025-02-07 16:57:36,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 2.13265306122449) internal successors, (418), 194 states have internal predecessors, (418), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2025-02-07 16:57:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 2908 transitions. [2025-02-07 16:57:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2025-02-07 16:57:36,845 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:57:36,846 INFO L218 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:57:36,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 16:57:37,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-07 16:57:37,050 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:57:37,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:57:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1076092534, now seen corresponding path program 3 times [2025-02-07 16:57:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:57:37,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312714241] [2025-02-07 16:57:37,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:57:37,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:57:37,075 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 242 statements into 42 equivalence classes. [2025-02-07 16:57:37,690 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) and asserted 215 of 242 statements. [2025-02-07 16:57:37,690 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2025-02-07 16:57:37,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:57:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 2755 proven. 472 refuted. 0 times theorem prover too weak. 2675 trivial. 0 not checked. [2025-02-07 16:57:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:57:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312714241] [2025-02-07 16:57:42,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312714241] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:57:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943507478] [2025-02-07 16:57:42,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:57:42,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:57:42,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:57:42,047 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:57:42,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 16:57:42,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 242 statements into 42 equivalence classes.