./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c --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/recursive-simple/id_i20_o20-2.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 80b250f44ccc89442200d93f4bf6653c7aad36a18be4f80bda8f239187e0714d --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 21:05:23,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:05:23,612 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:05:23,619 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:05:23,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:05:23,642 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:05:23,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:05:23,644 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:05:23,644 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:05:23,644 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:05:23,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:05:23,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:05:23,646 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:05:23,646 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:05:23,646 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:05:23,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:05:23,647 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:05:23,648 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:05:23,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:05:23,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:05:23,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:05:23,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:05:23,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:05:23,649 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:05:23,649 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 -> 80b250f44ccc89442200d93f4bf6653c7aad36a18be4f80bda8f239187e0714d [2025-02-07 21:05:23,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:05:23,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:05:23,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:05:23,926 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:05:23,926 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:05:23,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2025-02-07 21:05:25,144 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5e1666263/954b95f6ba694315a61cb12347e0dd04/FLAG7c8ba902b [2025-02-07 21:05:25,400 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:05:25,400 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2025-02-07 21:05:25,413 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5e1666263/954b95f6ba694315a61cb12347e0dd04/FLAG7c8ba902b [2025-02-07 21:05:25,713 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5e1666263/954b95f6ba694315a61cb12347e0dd04 [2025-02-07 21:05:25,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:05:25,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:05:25,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:05:25,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:05:25,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:05:25,720 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,720 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a914293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25, skipping insertion in model container [2025-02-07 21:05:25,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,730 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:05:25,820 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c[454,467] [2025-02-07 21:05:25,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:05:25,828 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:05:25,836 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c[454,467] [2025-02-07 21:05:25,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:05:25,846 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:05:25,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25 WrapperNode [2025-02-07 21:05:25,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:05:25,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:05:25,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:05:25,849 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:05:25,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,855 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,863 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2025-02-07 21:05:25,864 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:05:25,864 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:05:25,864 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:05:25,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:05:25,869 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,870 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,876 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 21:05:25,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,877 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,877 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,880 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,881 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:05:25,882 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:05:25,883 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:05:25,883 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:05:25,883 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (1/1) ... [2025-02-07 21:05:25,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:05:25,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:25,905 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 21:05:25,913 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 21:05:25,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:05:25,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:05:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:05:25,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:05:25,926 INFO L130 BoogieDeclarations]: Found specification of procedure id [2025-02-07 21:05:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2025-02-07 21:05:25,964 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:05:25,965 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:05:26,021 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: havoc #t~ret4; [2025-02-07 21:05:26,024 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-02-07 21:05:26,024 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:05:26,029 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:05:26,029 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:05:26,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:05:26 BoogieIcfgContainer [2025-02-07 21:05:26,029 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:05:26,031 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:05:26,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:05:26,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:05:26,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:05:25" (1/3) ... [2025-02-07 21:05:26,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5d8d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:05:26, skipping insertion in model container [2025-02-07 21:05:26,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:05:25" (2/3) ... [2025-02-07 21:05:26,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5d8d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:05:26, skipping insertion in model container [2025-02-07 21:05:26,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:05:26" (3/3) ... [2025-02-07 21:05:26,035 INFO L128 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2025-02-07 21:05:26,044 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:05:26,045 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG id_i20_o20-2.c that has 2 procedures, 15 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:05:26,072 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:05:26,079 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;@66182c14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:05:26,080 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:05:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 21:05:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 21:05:26,085 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:26,086 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:26,086 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:26,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2049432346, now seen corresponding path program 1 times [2025-02-07 21:05:26,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:26,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114840498] [2025-02-07 21:05:26,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:05:26,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:26,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 21:05:26,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 21:05:26,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:26,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:05:26,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:26,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114840498] [2025-02-07 21:05:26,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114840498] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:05:26,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:05:26,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:05:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611201382] [2025-02-07 21:05:26,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:05:26,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 21:05:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:26,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 21:05:26,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:05:26,361 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:05:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:26,395 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2025-02-07 21:05:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 21:05:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2025-02-07 21:05:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:26,400 INFO L225 Difference]: With dead ends: 24 [2025-02-07 21:05:26,400 INFO L226 Difference]: Without dead ends: 14 [2025-02-07 21:05:26,402 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:05:26,403 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:26,404 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-02-07 21:05:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-02-07 21:05:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:05:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2025-02-07 21:05:26,427 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2025-02-07 21:05:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:26,427 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2025-02-07 21:05:26,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:05:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2025-02-07 21:05:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 21:05:26,429 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:26,429 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:26,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 21:05:26,429 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:26,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1071660829, now seen corresponding path program 1 times [2025-02-07 21:05:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865208709] [2025-02-07 21:05:26,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:05:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:26,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 21:05:26,442 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 21:05:26,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:26,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 21:05:26,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:26,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865208709] [2025-02-07 21:05:26,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865208709] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:26,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074522992] [2025-02-07 21:05:26,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:05:26,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:26,511 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 21:05:26,512 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 21:05:26,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 21:05:26,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 21:05:26,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:26,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:26,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 21:05:26,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 21:05:26,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:05:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074522992] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:26,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:26,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-02-07 21:05:26,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189331457] [2025-02-07 21:05:26,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:26,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 21:05:26,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:26,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 21:05:26,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-07 21:05:26,724 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 21:05:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:26,764 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2025-02-07 21:05:26,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 21:05:26,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 15 [2025-02-07 21:05:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:26,765 INFO L225 Difference]: With dead ends: 21 [2025-02-07 21:05:26,765 INFO L226 Difference]: Without dead ends: 17 [2025-02-07 21:05:26,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-07 21:05:26,766 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:26,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-02-07 21:05:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-02-07 21:05:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 21:05:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2025-02-07 21:05:26,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2025-02-07 21:05:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:26,769 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2025-02-07 21:05:26,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 21:05:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2025-02-07 21:05:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-07 21:05:26,770 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:26,770 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:26,776 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 21:05:26,974 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 21:05:26,974 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:26,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash 694941498, now seen corresponding path program 2 times [2025-02-07 21:05:26,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:26,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133992453] [2025-02-07 21:05:26,975 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:26,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:26,987 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-07 21:05:27,010 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 21:05:27,015 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:27,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:05:27,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:27,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133992453] [2025-02-07 21:05:27,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133992453] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:27,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528572501] [2025-02-07 21:05:27,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:27,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:27,110 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 21:05:27,112 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 21:05:27,130 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-07 21:05:27,139 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 21:05:27,139 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:27,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:27,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:05:27,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:05:27,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 21:05:27,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528572501] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:27,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:27,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2025-02-07 21:05:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267629965] [2025-02-07 21:05:27,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:27,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 21:05:27,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:27,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 21:05:27,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-02-07 21:05:27,388 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 21:05:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:27,450 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2025-02-07 21:05:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 21:05:27,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 21 [2025-02-07 21:05:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:27,451 INFO L225 Difference]: With dead ends: 24 [2025-02-07 21:05:27,451 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 21:05:27,452 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-02-07 21:05:27,453 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:27,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 21:05:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-07 21:05:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 21:05:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2025-02-07 21:05:27,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2025-02-07 21:05:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:27,460 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2025-02-07 21:05:27,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 21:05:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2025-02-07 21:05:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 21:05:27,461 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:27,461 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:27,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:27,661 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 21:05:27,661 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:27,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1868965309, now seen corresponding path program 3 times [2025-02-07 21:05:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:27,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992793491] [2025-02-07 21:05:27,663 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:27,670 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-07 21:05:27,684 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 21:05:27,685 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:05:27,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 21:05:27,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:27,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992793491] [2025-02-07 21:05:27,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992793491] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:27,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482455920] [2025-02-07 21:05:27,878 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:27,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:27,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:27,884 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 21:05:27,886 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 21:05:27,908 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-07 21:05:27,917 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 21:05:27,917 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:05:27,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:27,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 21:05:27,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 21:05:27,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 21:05:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482455920] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:28,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2025-02-07 21:05:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722470613] [2025-02-07 21:05:28,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:28,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 21:05:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:28,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 21:05:28,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-07 21:05:28,383 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-02-07 21:05:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:28,461 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2025-02-07 21:05:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 21:05:28,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 27 [2025-02-07 21:05:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:28,462 INFO L225 Difference]: With dead ends: 27 [2025-02-07 21:05:28,462 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 21:05:28,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2025-02-07 21:05:28,463 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:28,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 49 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:28,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 21:05:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-07 21:05:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 21:05:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2025-02-07 21:05:28,468 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2025-02-07 21:05:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:28,468 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2025-02-07 21:05:28,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-02-07 21:05:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2025-02-07 21:05:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 21:05:28,469 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:28,469 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:28,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:28,669 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 21:05:28,670 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:28,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1787489114, now seen corresponding path program 4 times [2025-02-07 21:05:28,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:28,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560134690] [2025-02-07 21:05:28,671 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:28,676 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-02-07 21:05:28,690 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 21:05:28,690 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:05:28,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-07 21:05:28,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:28,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560134690] [2025-02-07 21:05:28,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560134690] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:28,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168697423] [2025-02-07 21:05:28,807 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:28,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:28,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:28,809 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 21:05:28,812 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 21:05:28,834 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-02-07 21:05:28,843 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 21:05:28,844 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:05:28,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:28,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 21:05:28,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-07 21:05:28,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 21:05:29,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168697423] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:29,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:29,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 13] total 20 [2025-02-07 21:05:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979447938] [2025-02-07 21:05:29,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:29,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 21:05:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:29,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 21:05:29,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2025-02-07 21:05:29,755 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-07 21:05:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:29,883 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2025-02-07 21:05:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:05:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 33 [2025-02-07 21:05:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:29,884 INFO L225 Difference]: With dead ends: 42 [2025-02-07 21:05:29,884 INFO L226 Difference]: Without dead ends: 38 [2025-02-07 21:05:29,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2025-02-07 21:05:29,885 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:29,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 65 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-07 21:05:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2025-02-07 21:05:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-07 21:05:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2025-02-07 21:05:29,891 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2025-02-07 21:05:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:29,891 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2025-02-07 21:05:29,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-07 21:05:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2025-02-07 21:05:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-07 21:05:29,892 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:29,892 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:29,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:30,095 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 21:05:30,095 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:30,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash 507757827, now seen corresponding path program 5 times [2025-02-07 21:05:30,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:30,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761792825] [2025-02-07 21:05:30,096 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:30,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:30,100 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 8 equivalence classes. [2025-02-07 21:05:30,119 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 21:05:30,119 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 21:05:30,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-02-07 21:05:30,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:30,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761792825] [2025-02-07 21:05:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761792825] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:30,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119199825] [2025-02-07 21:05:30,478 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:30,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:30,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:30,485 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 21:05:30,490 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 21:05:30,525 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 8 equivalence classes. [2025-02-07 21:05:30,539 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 21:05:30,540 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 21:05:30,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:30,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 21:05:30,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-02-07 21:05:30,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 21:05:32,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119199825] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:32,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:32,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 19] total 38 [2025-02-07 21:05:32,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175027741] [2025-02-07 21:05:32,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:32,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-07 21:05:32,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:32,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-07 21:05:32,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 21:05:32,585 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 38 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (24), 16 states have call predecessors, (24), 11 states have call successors, (24) [2025-02-07 21:05:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:32,818 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2025-02-07 21:05:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 21:05:32,818 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (24), 16 states have call predecessors, (24), 11 states have call successors, (24) Word has length 51 [2025-02-07 21:05:32,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:32,820 INFO L225 Difference]: With dead ends: 48 [2025-02-07 21:05:32,820 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 21:05:32,824 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=529, Invalid=2227, Unknown=0, NotChecked=0, Total=2756 [2025-02-07 21:05:32,825 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:32,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 126 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 21:05:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2025-02-07 21:05:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-07 21:05:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2025-02-07 21:05:32,839 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 51 [2025-02-07 21:05:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:32,839 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2025-02-07 21:05:32,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (24), 16 states have call predecessors, (24), 11 states have call successors, (24) [2025-02-07 21:05:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2025-02-07 21:05:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-07 21:05:32,840 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:32,840 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:32,846 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 21:05:33,040 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 21:05:33,041 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:33,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash -617522278, now seen corresponding path program 6 times [2025-02-07 21:05:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:33,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669607588] [2025-02-07 21:05:33,043 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:33,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:33,057 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 9 equivalence classes. [2025-02-07 21:05:33,074 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 21:05:33,074 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 21:05:33,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-07 21:05:33,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669607588] [2025-02-07 21:05:33,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669607588] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:33,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405215915] [2025-02-07 21:05:33,336 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:33,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:33,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:33,339 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 21:05:33,340 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 21:05:33,396 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 9 equivalence classes. [2025-02-07 21:05:33,411 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 21:05:33,411 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 21:05:33,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:33,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 21:05:33,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-07 21:05:33,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 21:05:35,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405215915] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:35,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:35,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 21] total 42 [2025-02-07 21:05:35,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425972126] [2025-02-07 21:05:35,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:35,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-02-07 21:05:35,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:35,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-02-07 21:05:35,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2025-02-07 21:05:35,996 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 42 states, 40 states have (on average 1.65) internal successors, (66), 33 states have internal predecessors, (66), 12 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (27), 18 states have call predecessors, (27), 12 states have call successors, (27) [2025-02-07 21:05:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:36,311 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2025-02-07 21:05:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 21:05:36,312 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.65) internal successors, (66), 33 states have internal predecessors, (66), 12 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (27), 18 states have call predecessors, (27), 12 states have call successors, (27) Word has length 57 [2025-02-07 21:05:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:36,313 INFO L225 Difference]: With dead ends: 51 [2025-02-07 21:05:36,313 INFO L226 Difference]: Without dead ends: 44 [2025-02-07 21:05:36,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=657, Invalid=2765, Unknown=0, NotChecked=0, Total=3422 [2025-02-07 21:05:36,314 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 114 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:36,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 144 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-07 21:05:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2025-02-07 21:05:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-02-07 21:05:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2025-02-07 21:05:36,319 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 57 [2025-02-07 21:05:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:36,319 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2025-02-07 21:05:36,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.65) internal successors, (66), 33 states have internal predecessors, (66), 12 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (27), 18 states have call predecessors, (27), 12 states have call successors, (27) [2025-02-07 21:05:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2025-02-07 21:05:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-02-07 21:05:36,320 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:36,320 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:36,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:36,525 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 21:05:36,525 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:36,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:36,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1351063139, now seen corresponding path program 7 times [2025-02-07 21:05:36,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:36,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596837194] [2025-02-07 21:05:36,526 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:05:36,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:36,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-07 21:05:36,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-07 21:05:36,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:36,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-02-07 21:05:37,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:37,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596837194] [2025-02-07 21:05:37,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596837194] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:37,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909019783] [2025-02-07 21:05:37,074 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:05:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:37,076 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 21:05:37,077 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 21:05:37,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-07 21:05:37,167 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-07 21:05:37,167 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:37,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:37,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 21:05:37,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-02-07 21:05:37,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 21:05:40,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909019783] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:40,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2025-02-07 21:05:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578528636] [2025-02-07 21:05:40,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:40,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 21:05:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:40,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 21:05:40,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-02-07 21:05:40,631 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2025-02-07 21:05:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:40,763 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2025-02-07 21:05:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 21:05:40,764 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) Word has length 63 [2025-02-07 21:05:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:40,765 INFO L225 Difference]: With dead ends: 54 [2025-02-07 21:05:40,768 INFO L226 Difference]: Without dead ends: 47 [2025-02-07 21:05:40,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 21:05:40,769 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:40,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 97 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-07 21:05:40,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2025-02-07 21:05:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2025-02-07 21:05:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2025-02-07 21:05:40,779 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 63 [2025-02-07 21:05:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:40,779 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2025-02-07 21:05:40,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2025-02-07 21:05:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2025-02-07 21:05:40,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-07 21:05:40,782 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:40,782 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:40,789 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 21:05:40,987 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 21:05:40,987 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:40,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1612392518, now seen corresponding path program 8 times [2025-02-07 21:05:40,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:40,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815118244] [2025-02-07 21:05:40,988 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:40,994 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-02-07 21:05:41,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-07 21:05:41,004 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:41,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-02-07 21:05:41,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:41,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815118244] [2025-02-07 21:05:41,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815118244] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:41,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551688776] [2025-02-07 21:05:41,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:41,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:41,202 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 21:05:41,204 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 21:05:41,315 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-02-07 21:05:41,332 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-07 21:05:41,332 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:41,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:41,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 21:05:41,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-02-07 21:05:41,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 21:05:45,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551688776] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:45,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:45,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 29 [2025-02-07 21:05:45,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259113249] [2025-02-07 21:05:45,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:45,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 21:05:45,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:45,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 21:05:45,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2025-02-07 21:05:45,647 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-02-07 21:05:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:45,898 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2025-02-07 21:05:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 21:05:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) Word has length 69 [2025-02-07 21:05:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:45,899 INFO L225 Difference]: With dead ends: 57 [2025-02-07 21:05:45,899 INFO L226 Difference]: Without dead ends: 50 [2025-02-07 21:05:45,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 123 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 21:05:45,900 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:45,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 84 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-02-07 21:05:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2025-02-07 21:05:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2025-02-07 21:05:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2025-02-07 21:05:45,910 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 69 [2025-02-07 21:05:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:45,910 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2025-02-07 21:05:45,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-02-07 21:05:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2025-02-07 21:05:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-07 21:05:45,912 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:45,912 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:45,921 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 21:05:46,113 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 21:05:46,113 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:46,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1119006781, now seen corresponding path program 9 times [2025-02-07 21:05:46,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:46,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214294139] [2025-02-07 21:05:46,114 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:46,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:46,120 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 12 equivalence classes. [2025-02-07 21:05:46,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 21:05:46,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-02-07 21:05:46,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 224 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2025-02-07 21:05:46,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:46,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214294139] [2025-02-07 21:05:46,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214294139] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:46,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396389437] [2025-02-07 21:05:46,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:46,371 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 21:05:46,372 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 21:05:46,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 12 equivalence classes. [2025-02-07 21:05:46,550 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 21:05:46,551 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-02-07 21:05:46,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:46,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-07 21:05:46,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-02-07 21:05:46,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 21:05:51,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396389437] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:51,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:51,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 27] total 34 [2025-02-07 21:05:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488704297] [2025-02-07 21:05:51,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:51,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-07 21:05:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:51,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-07 21:05:51,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 21:05:51,683 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) [2025-02-07 21:05:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:51,803 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2025-02-07 21:05:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 21:05:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) Word has length 75 [2025-02-07 21:05:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:51,805 INFO L225 Difference]: With dead ends: 60 [2025-02-07 21:05:51,805 INFO L226 Difference]: Without dead ends: 53 [2025-02-07 21:05:51,805 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1352, Unknown=0, NotChecked=0, Total=1980 [2025-02-07 21:05:51,806 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:51,806 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 101 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:05:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-02-07 21:05:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2025-02-07 21:05:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2025-02-07 21:05:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2025-02-07 21:05:51,810 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 75 [2025-02-07 21:05:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:51,810 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2025-02-07 21:05:51,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) [2025-02-07 21:05:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2025-02-07 21:05:51,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-07 21:05:51,811 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:51,811 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:51,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:52,015 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 21:05:52,015 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:52,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:52,015 INFO L85 PathProgramCache]: Analyzing trace with hash -523555878, now seen corresponding path program 10 times [2025-02-07 21:05:52,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:52,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147430281] [2025-02-07 21:05:52,015 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:52,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:52,026 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-02-07 21:05:52,030 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 21:05:52,030 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:05:52,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 21 proven. 245 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2025-02-07 21:05:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147430281] [2025-02-07 21:05:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147430281] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642293133] [2025-02-07 21:05:52,228 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:52,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:52,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:52,230 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 21:05:52,261 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 21:05:52,484 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-02-07 21:05:52,505 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 21:05:52,506 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:05:52,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:52,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-07 21:05:52,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-02-07 21:05:52,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-07 21:05:59,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642293133] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:59,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:59,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 29] total 36 [2025-02-07 21:05:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286887307] [2025-02-07 21:05:59,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:59,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-07 21:05:59,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:59,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-07 21:05:59,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 21:05:59,048 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2025-02-07 21:05:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:59,266 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2025-02-07 21:05:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 21:05:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) Word has length 81 [2025-02-07 21:05:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:59,268 INFO L225 Difference]: With dead ends: 72 [2025-02-07 21:05:59,268 INFO L226 Difference]: Without dead ends: 62 [2025-02-07 21:05:59,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2025-02-07 21:05:59,269 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:59,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 124 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-07 21:05:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2025-02-07 21:05:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2025-02-07 21:05:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2025-02-07 21:05:59,275 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 81 [2025-02-07 21:05:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:59,275 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2025-02-07 21:05:59,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2025-02-07 21:05:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2025-02-07 21:05:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-02-07 21:05:59,276 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:59,276 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:59,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:59,481 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 21:05:59,481 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:59,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1241938563, now seen corresponding path program 11 times [2025-02-07 21:05:59,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:59,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383407350] [2025-02-07 21:05:59,481 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:59,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:59,489 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 16 equivalence classes. [2025-02-07 21:05:59,501 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 99 of 99 statements. [2025-02-07 21:05:59,501 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-02-07 21:05:59,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-02-07 21:05:59,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:59,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383407350] [2025-02-07 21:05:59,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383407350] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:59,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201900019] [2025-02-07 21:05:59,935 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:59,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:59,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:59,937 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 21:05:59,938 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 21:06:00,245 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 16 equivalence classes. [2025-02-07 21:06:00,270 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 99 of 99 statements. [2025-02-07 21:06:00,270 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-02-07 21:06:00,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:06:00,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-07 21:06:00,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:06:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-02-07 21:06:00,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:06:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-07 21:06:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201900019] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:06:12,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:06:12,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 20, 35] total 70 [2025-02-07 21:06:12,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429133938] [2025-02-07 21:06:12,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:06:12,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-02-07 21:06:12,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:06:12,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-02-07 21:06:12,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=4195, Unknown=0, NotChecked=0, Total=4830 [2025-02-07 21:06:12,988 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 70 states, 68 states have (on average 1.588235294117647) internal successors, (108), 54 states have internal predecessors, (108), 19 states have call successors, (20), 1 states have call predecessors, (20), 32 states have return successors, (48), 32 states have call predecessors, (48), 19 states have call successors, (48) [2025-02-07 21:06:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:06:13,761 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2025-02-07 21:06:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-07 21:06:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.588235294117647) internal successors, (108), 54 states have internal predecessors, (108), 19 states have call successors, (20), 1 states have call predecessors, (20), 32 states have return successors, (48), 32 states have call predecessors, (48), 19 states have call successors, (48) Word has length 99 [2025-02-07 21:06:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:06:13,763 INFO L225 Difference]: With dead ends: 72 [2025-02-07 21:06:13,763 INFO L226 Difference]: Without dead ends: 65 [2025-02-07 21:06:13,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 147 SyntacticMatches, 16 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1945, Invalid=8155, Unknown=0, NotChecked=0, Total=10100 [2025-02-07 21:06:13,767 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 288 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:06:13,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 174 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:06:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-07 21:06:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2025-02-07 21:06:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2025-02-07 21:06:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2025-02-07 21:06:13,773 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 99 [2025-02-07 21:06:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:06:13,773 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2025-02-07 21:06:13,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.588235294117647) internal successors, (108), 54 states have internal predecessors, (108), 19 states have call successors, (20), 1 states have call predecessors, (20), 32 states have return successors, (48), 32 states have call predecessors, (48), 19 states have call successors, (48) [2025-02-07 21:06:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2025-02-07 21:06:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-02-07 21:06:13,775 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:06:13,775 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:06:13,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 21:06:13,979 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 21:06:13,979 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:06:13,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:06:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash -938976230, now seen corresponding path program 12 times [2025-02-07 21:06:13,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:06:13,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025279898] [2025-02-07 21:06:13,979 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:06:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:06:13,990 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 17 equivalence classes. [2025-02-07 21:06:14,004 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 105 of 105 statements. [2025-02-07 21:06:14,005 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-02-07 21:06:14,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:06:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 52 proven. 458 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-02-07 21:06:14,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:06:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025279898] [2025-02-07 21:06:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025279898] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:06:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915500156] [2025-02-07 21:06:14,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:06:14,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:06:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:06:14,354 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 21:06:14,355 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 21:06:14,797 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 17 equivalence classes. [2025-02-07 21:06:14,836 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 105 of 105 statements. [2025-02-07 21:06:14,836 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-02-07 21:06:14,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:06:14,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-07 21:06:14,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:06:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2025-02-07 21:06:14,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:06:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-02-07 21:06:29,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915500156] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:06:29,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:06:29,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 37] total 44 [2025-02-07 21:06:29,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39748862] [2025-02-07 21:06:29,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:06:29,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-02-07 21:06:29,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:06:29,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-02-07 21:06:29,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1379, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 21:06:29,149 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (39), 18 states have call predecessors, (39), 21 states have call successors, (39) [2025-02-07 21:06:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:06:29,390 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2025-02-07 21:06:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 21:06:29,390 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (39), 18 states have call predecessors, (39), 21 states have call successors, (39) Word has length 105 [2025-02-07 21:06:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:06:29,391 INFO L225 Difference]: With dead ends: 75 [2025-02-07 21:06:29,392 INFO L226 Difference]: Without dead ends: 68 [2025-02-07 21:06:29,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1138, Invalid=2402, Unknown=0, NotChecked=0, Total=3540 [2025-02-07 21:06:29,393 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 179 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:06:29,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 135 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:06:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-07 21:06:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2025-02-07 21:06:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2025-02-07 21:06:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2025-02-07 21:06:29,398 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 105 [2025-02-07 21:06:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:06:29,399 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2025-02-07 21:06:29,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (39), 18 states have call predecessors, (39), 21 states have call successors, (39) [2025-02-07 21:06:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2025-02-07 21:06:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-02-07 21:06:29,399 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:06:29,400 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:06:29,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 21:06:29,600 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 21:06:29,600 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:06:29,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:06:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1022497821, now seen corresponding path program 13 times [2025-02-07 21:06:29,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:06:29,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550290652] [2025-02-07 21:06:29,601 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:06:29,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:06:29,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-02-07 21:06:29,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-02-07 21:06:29,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:06:29,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:06:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2025-02-07 21:06:29,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:06:29,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550290652] [2025-02-07 21:06:29,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550290652] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:06:29,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786375868] [2025-02-07 21:06:29,958 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:06:29,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:06:29,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:06:29,960 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 21:06:29,964 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 21:06:30,562 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-02-07 21:06:30,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-02-07 21:06:30,586 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:06:30,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:06:30,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-07 21:06:30,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:06:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2025-02-07 21:06:30,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:06:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-02-07 21:06:47,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786375868] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:06:47,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:06:47,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 41 [2025-02-07 21:06:47,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182336201] [2025-02-07 21:06:47,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:06:47,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-07 21:06:47,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:06:47,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-07 21:06:47,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1218, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 21:06:47,333 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 41 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2025-02-07 21:06:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:06:47,649 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2025-02-07 21:06:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 21:06:47,650 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) Word has length 111 [2025-02-07 21:06:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:06:47,650 INFO L225 Difference]: With dead ends: 78 [2025-02-07 21:06:47,650 INFO L226 Difference]: Without dead ends: 71 [2025-02-07 21:06:47,652 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 202 SyntacticMatches, 18 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1068, Invalid=2238, Unknown=0, NotChecked=0, Total=3306 [2025-02-07 21:06:47,652 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 269 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:06:47,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 133 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:06:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-02-07 21:06:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2025-02-07 21:06:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2025-02-07 21:06:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2025-02-07 21:06:47,660 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 111 [2025-02-07 21:06:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:06:47,660 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2025-02-07 21:06:47,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2025-02-07 21:06:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2025-02-07 21:06:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-02-07 21:06:47,661 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:06:47,661 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:06:47,670 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 21:06:47,862 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 21:06:47,862 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:06:47,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:06:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash 529217594, now seen corresponding path program 14 times [2025-02-07 21:06:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:06:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578696011] [2025-02-07 21:06:47,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:06:47,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:06:47,875 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-02-07 21:06:47,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-02-07 21:06:47,882 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:06:47,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:06:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2025-02-07 21:06:48,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:06:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578696011] [2025-02-07 21:06:48,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578696011] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:06:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373145047] [2025-02-07 21:06:48,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:06:48,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:06:48,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:06:48,268 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 21:06:48,269 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 21:06:49,143 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-02-07 21:06:49,167 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-02-07 21:06:49,167 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:06:49,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:06:49,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-07 21:06:49,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:06:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-02-07 21:06:49,260 INFO L312 TraceCheckSpWp]: Computing backward predicates...