./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_20-1.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 3ed743515f4bceb442ae4e323a2d4b2eccbeef1c0a0d2152663feb9a9e538afb --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:56:28,819 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:56:28,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:56:28,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:56:28,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:56:28,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:56:28,915 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:56:28,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:56:28,915 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:56:28,915 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:56:28,915 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:56:28,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:56:28,916 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:56:28,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:56:28,916 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:56:28,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:56:28,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:56:28,917 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:56:28,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:56:28,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:56:28,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:56:28,917 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:56:28,917 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:56:28,917 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:56:28,917 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:56:28,918 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:56:28,918 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:56:28,918 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:56:28,918 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:56:28,918 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:56:28,918 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:56:28,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:56:28,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:56:28,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:56:28,919 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:56:28,919 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 -> 3ed743515f4bceb442ae4e323a2d4b2eccbeef1c0a0d2152663feb9a9e538afb [2025-02-05 15:56:29,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:56:29,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:56:29,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:56:29,217 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:56:29,217 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:56:29,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_20-1.c [2025-02-05 15:56:30,535 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c2972042/90ab93b9e6a9419b81e795b14cd865ab/FLAG38a30daeb [2025-02-05 15:56:30,800 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:56:30,801 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_20-1.c [2025-02-05 15:56:30,817 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c2972042/90ab93b9e6a9419b81e795b14cd865ab/FLAG38a30daeb [2025-02-05 15:56:30,849 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c2972042/90ab93b9e6a9419b81e795b14cd865ab [2025-02-05 15:56:30,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:56:30,854 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:56:30,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:56:30,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:56:30,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:56:30,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:56:30" (1/1) ... [2025-02-05 15:56:30,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b009e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:30, skipping insertion in model container [2025-02-05 15:56:30,862 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:56:30" (1/1) ... [2025-02-05 15:56:30,881 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:56:31,016 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/fibo_20-1.c[745,758] [2025-02-05 15:56:31,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:56:31,032 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:56:31,043 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/fibo_20-1.c[745,758] [2025-02-05 15:56:31,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:56:31,059 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:56:31,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31 WrapperNode [2025-02-05 15:56:31,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:56:31,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:56:31,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:56:31,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:56:31,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,087 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-02-05 15:56:31,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:56:31,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:56:31,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:56:31,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:56:31,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,096 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,111 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]. [2025-02-05 15:56:31,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,114 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,116 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,116 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,118 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:56:31,119 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:56:31,120 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:56:31,120 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:56:31,121 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (1/1) ... [2025-02-05 15:56:31,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:56:31,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:31,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:56:31,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:56:31,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:56:31,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:56:31,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:56:31,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:56:31,175 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-02-05 15:56:31,175 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-02-05 15:56:31,234 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:56:31,236 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:56:31,330 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-02-05 15:56:31,336 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 15:56:31,337 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:56:31,348 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:56:31,349 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:56:31,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:56:31 BoogieIcfgContainer [2025-02-05 15:56:31,350 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:56:31,354 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:56:31,354 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:56:31,359 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:56:31,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:56:30" (1/3) ... [2025-02-05 15:56:31,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64cf309e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:56:31, skipping insertion in model container [2025-02-05 15:56:31,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:31" (2/3) ... [2025-02-05 15:56:31,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64cf309e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:56:31, skipping insertion in model container [2025-02-05 15:56:31,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:56:31" (3/3) ... [2025-02-05 15:56:31,362 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_20-1.c [2025-02-05 15:56:31,379 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:56:31,382 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_20-1.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 15:56:31,439 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:56:31,451 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;@1ac34b9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:56:31,452 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:56:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 15:56:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:56:31,462 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:31,463 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:31,463 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:31,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash 402921910, now seen corresponding path program 1 times [2025-02-05 15:56:31,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:31,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497508902] [2025-02-05 15:56:31,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:31,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:31,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:56:31,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:56:31,565 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:31,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:56:31,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:31,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497508902] [2025-02-05 15:56:31,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497508902] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:56:31,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:56:31,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:56:31,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550837427] [2025-02-05 15:56:31,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:56:31,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:56:31,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:31,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:56:31,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:56:31,736 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2025-02-05 15:56:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:31,767 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2025-02-05 15:56:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:56:31,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2025-02-05 15:56:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:31,775 INFO L225 Difference]: With dead ends: 30 [2025-02-05 15:56:31,775 INFO L226 Difference]: Without dead ends: 18 [2025-02-05 15:56:31,779 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 [2025-02-05 15:56:31,784 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:31,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:56:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-02-05 15:56:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-02-05 15:56:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:56:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-02-05 15:56:31,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2025-02-05 15:56:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:31,812 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-02-05 15:56:31,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2025-02-05 15:56:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-02-05 15:56:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 15:56:31,813 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:31,814 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:31,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:56:31,814 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:31,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:31,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2143228819, now seen corresponding path program 1 times [2025-02-05 15:56:31,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:31,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300199291] [2025-02-05 15:56:31,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:31,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:31,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 15:56:31,828 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 15:56:31,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:31,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:56:31,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:31,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300199291] [2025-02-05 15:56:31,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300199291] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:56:31,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:56:31,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:56:31,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354406736] [2025-02-05 15:56:31,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:56:31,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:56:31,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:31,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:56:31,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:56:31,888 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-02-05 15:56:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:31,912 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-02-05 15:56:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:56:31,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2025-02-05 15:56:31,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:31,914 INFO L225 Difference]: With dead ends: 24 [2025-02-05 15:56:31,914 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 15:56:31,915 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 [2025-02-05 15:56:31,915 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:31,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:56:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 15:56:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-02-05 15:56:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:56:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-02-05 15:56:31,921 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2025-02-05 15:56:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:31,921 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-02-05 15:56:31,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-02-05 15:56:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-02-05 15:56:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 15:56:31,921 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:31,922 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:31,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:56:31,922 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:31,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1857137997, now seen corresponding path program 1 times [2025-02-05 15:56:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:31,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285066188] [2025-02-05 15:56:31,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:31,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:31,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:56:31,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:56:31,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:31,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:56:32,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:32,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285066188] [2025-02-05 15:56:32,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285066188] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:32,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492909120] [2025-02-05 15:56:32,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:32,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:32,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:32,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:32,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:56:32,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:56:32,130 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:56:32,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:32,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:32,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:56:32,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:56:32,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:56:32,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492909120] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:32,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:32,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-02-05 15:56:32,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694787187] [2025-02-05 15:56:32,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:32,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:56:32,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:32,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:56:32,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:56:32,474 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:56:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:32,564 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-02-05 15:56:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:56:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-02-05 15:56:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:32,566 INFO L225 Difference]: With dead ends: 35 [2025-02-05 15:56:32,566 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 15:56:32,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:56:32,567 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:32,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 15:56:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-05 15:56:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 15:56:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-02-05 15:56:32,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2025-02-05 15:56:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:32,576 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-02-05 15:56:32,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:56:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-02-05 15:56:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 15:56:32,577 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:32,578 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:32,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:56:32,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:32,780 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:32,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:32,781 INFO L85 PathProgramCache]: Analyzing trace with hash -318077138, now seen corresponding path program 1 times [2025-02-05 15:56:32,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:32,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068348316] [2025-02-05 15:56:32,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:32,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:32,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:56:32,794 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:56:32,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:32,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:56:32,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:32,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068348316] [2025-02-05 15:56:32,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068348316] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:32,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928511618] [2025-02-05 15:56:32,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:32,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:32,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:32,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:32,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:56:32,930 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:56:32,941 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:56:32,941 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:32,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:32,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:56:32,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:56:32,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:56:33,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928511618] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:33,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:33,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-02-05 15:56:33,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894729053] [2025-02-05 15:56:33,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:33,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 15:56:33,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:33,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 15:56:33,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:56:33,156 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:56:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:33,225 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-02-05 15:56:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:56:33,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-02-05 15:56:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:33,226 INFO L225 Difference]: With dead ends: 29 [2025-02-05 15:56:33,227 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 15:56:33,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:56:33,228 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:33,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 15:56:33,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-05 15:56:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 15:56:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-02-05 15:56:33,238 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2025-02-05 15:56:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:33,238 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-02-05 15:56:33,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:56:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-02-05 15:56:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 15:56:33,240 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:33,240 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:33,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 15:56:33,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:33,441 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:33,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -896080901, now seen corresponding path program 2 times [2025-02-05 15:56:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:33,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962185102] [2025-02-05 15:56:33,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:33,448 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 15:56:33,459 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:56:33,460 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:33,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 15:56:33,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:33,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962185102] [2025-02-05 15:56:33,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962185102] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:33,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242143679] [2025-02-05 15:56:33,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:33,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:33,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:33,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:33,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:56:33,711 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 15:56:33,726 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:56:33,726 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:33,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:33,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:56:33,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-05 15:56:33,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 15:56:34,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242143679] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:34,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:34,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 20 [2025-02-05 15:56:34,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699314697] [2025-02-05 15:56:34,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:34,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:56:34,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:34,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:56:34,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:56:34,213 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-05 15:56:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:34,514 INFO L93 Difference]: Finished difference Result 46 states and 83 transitions. [2025-02-05 15:56:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:56:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2025-02-05 15:56:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:34,516 INFO L225 Difference]: With dead ends: 46 [2025-02-05 15:56:34,516 INFO L226 Difference]: Without dead ends: 42 [2025-02-05 15:56:34,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2025-02-05 15:56:34,520 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:34,520 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 95 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:56:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-05 15:56:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2025-02-05 15:56:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2025-02-05 15:56:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 46 transitions. [2025-02-05 15:56:34,536 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 46 transitions. Word has length 37 [2025-02-05 15:56:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:34,537 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 46 transitions. [2025-02-05 15:56:34,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-05 15:56:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 46 transitions. [2025-02-05 15:56:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-02-05 15:56:34,540 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:34,540 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 9, 6, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:34,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 15:56:34,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:34,744 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:34,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash 525573421, now seen corresponding path program 3 times [2025-02-05 15:56:34,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:34,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261848679] [2025-02-05 15:56:34,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:56:34,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:34,755 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 12 equivalence classes. [2025-02-05 15:56:34,767 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 54 of 91 statements. [2025-02-05 15:56:34,767 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 15:56:34,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 167 proven. 29 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2025-02-05 15:56:34,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261848679] [2025-02-05 15:56:34,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261848679] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372317084] [2025-02-05 15:56:34,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:56:34,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:34,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:34,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:34,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:56:34,912 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 12 equivalence classes. [2025-02-05 15:56:34,930 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 54 of 91 statements. [2025-02-05 15:56:34,930 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 15:56:34,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:34,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:56:34,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 215 proven. 12 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-02-05 15:56:34,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 169 proven. 27 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2025-02-05 15:56:35,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372317084] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:35,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:35,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 13 [2025-02-05 15:56:35,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076547479] [2025-02-05 15:56:35,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:35,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 15:56:35,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:35,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 15:56:35,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:56:35,448 INFO L87 Difference]: Start difference. First operand 30 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2025-02-05 15:56:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:35,556 INFO L93 Difference]: Finished difference Result 62 states and 110 transitions. [2025-02-05 15:56:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:56:35,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) Word has length 91 [2025-02-05 15:56:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:35,558 INFO L225 Difference]: With dead ends: 62 [2025-02-05 15:56:35,558 INFO L226 Difference]: Without dead ends: 35 [2025-02-05 15:56:35,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:56:35,560 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:35,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 68 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-05 15:56:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2025-02-05 15:56:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2025-02-05 15:56:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2025-02-05 15:56:35,573 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 91 [2025-02-05 15:56:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:35,573 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2025-02-05 15:56:35,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2025-02-05 15:56:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2025-02-05 15:56:35,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-02-05 15:56:35,579 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:35,579 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:35,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 15:56:35,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 15:56:35,780 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:35,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1467785241, now seen corresponding path program 4 times [2025-02-05 15:56:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:35,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257147546] [2025-02-05 15:56:35,781 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:56:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:35,796 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 93 statements into 2 equivalence classes. [2025-02-05 15:56:35,806 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 77 of 93 statements. [2025-02-05 15:56:35,808 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:56:35,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 91 proven. 165 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2025-02-05 15:56:36,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:36,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257147546] [2025-02-05 15:56:36,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257147546] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:36,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875267033] [2025-02-05 15:56:36,021 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:56:36,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:36,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:36,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:36,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:56:36,064 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 93 statements into 2 equivalence classes. [2025-02-05 15:56:36,086 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 77 of 93 statements. [2025-02-05 15:56:36,086 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:56:36,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:36,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:56:36,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 170 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-02-05 15:56:36,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 182 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2025-02-05 15:56:36,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875267033] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:36,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:36,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-02-05 15:56:36,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999162801] [2025-02-05 15:56:36,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:36,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:56:36,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:36,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:56:36,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:56:36,956 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (21), 9 states have call predecessors, (21), 14 states have call successors, (21) [2025-02-05 15:56:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:37,227 INFO L93 Difference]: Finished difference Result 75 states and 123 transitions. [2025-02-05 15:56:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:56:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (21), 9 states have call predecessors, (21), 14 states have call successors, (21) Word has length 93 [2025-02-05 15:56:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:37,229 INFO L225 Difference]: With dead ends: 75 [2025-02-05 15:56:37,229 INFO L226 Difference]: Without dead ends: 46 [2025-02-05 15:56:37,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 174 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:56:37,230 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:37,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 100 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-05 15:56:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2025-02-05 15:56:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-05 15:56:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2025-02-05 15:56:37,245 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 93 [2025-02-05 15:56:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:37,246 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2025-02-05 15:56:37,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (21), 9 states have call predecessors, (21), 14 states have call successors, (21) [2025-02-05 15:56:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2025-02-05 15:56:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-02-05 15:56:37,247 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:37,247 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:37,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 15:56:37,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:37,448 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:37,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:37,449 INFO L85 PathProgramCache]: Analyzing trace with hash 152396661, now seen corresponding path program 5 times [2025-02-05 15:56:37,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:37,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042226056] [2025-02-05 15:56:37,449 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:56:37,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:37,454 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 8 equivalence classes. [2025-02-05 15:56:37,465 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 15:56:37,465 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-05 15:56:37,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 39 proven. 57 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-05 15:56:37,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:37,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042226056] [2025-02-05 15:56:37,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042226056] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:37,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435493465] [2025-02-05 15:56:37,564 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:56:37,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:37,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:37,566 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:37,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:56:37,610 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 8 equivalence classes. [2025-02-05 15:56:37,629 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 15:56:37,629 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-05 15:56:37,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:37,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:56:37,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2025-02-05 15:56:37,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-05 15:56:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435493465] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:37,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 12 [2025-02-05 15:56:37,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177854993] [2025-02-05 15:56:37,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:37,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:56:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:37,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:56:37,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:56:37,940 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-05 15:56:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:38,038 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2025-02-05 15:56:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:56:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 65 [2025-02-05 15:56:38,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:38,040 INFO L225 Difference]: With dead ends: 51 [2025-02-05 15:56:38,040 INFO L226 Difference]: Without dead ends: 46 [2025-02-05 15:56:38,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:56:38,040 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:38,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 69 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-05 15:56:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-02-05 15:56:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2025-02-05 15:56:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2025-02-05 15:56:38,047 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 65 [2025-02-05 15:56:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:38,048 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2025-02-05 15:56:38,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-05 15:56:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2025-02-05 15:56:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2025-02-05 15:56:38,051 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:38,051 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:38,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 15:56:38,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 15:56:38,252 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:38,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:38,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1346149011, now seen corresponding path program 6 times [2025-02-05 15:56:38,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:38,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092449507] [2025-02-05 15:56:38,253 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:56:38,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:38,260 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 147 statements into 21 equivalence classes. [2025-02-05 15:56:38,278 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 108 of 147 statements. [2025-02-05 15:56:38,279 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-02-05 15:56:38,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 111 proven. 250 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2025-02-05 15:56:38,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:38,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092449507] [2025-02-05 15:56:38,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092449507] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:38,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296199825] [2025-02-05 15:56:38,452 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:56:38,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:38,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:38,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:38,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:56:38,501 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 147 statements into 21 equivalence classes. [2025-02-05 15:56:38,535 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 108 of 147 statements. [2025-02-05 15:56:38,536 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-02-05 15:56:38,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:38,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:56:38,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 111 proven. 250 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2025-02-05 15:56:38,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 113 proven. 263 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2025-02-05 15:56:39,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296199825] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:39,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:39,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2025-02-05 15:56:39,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706761383] [2025-02-05 15:56:39,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:39,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 15:56:39,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:39,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 15:56:39,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:56:39,223 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 13 states, 11 states have (on average 3.727272727272727) internal successors, (41), 13 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2025-02-05 15:56:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:39,323 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2025-02-05 15:56:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:56:39,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.727272727272727) internal successors, (41), 13 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 147 [2025-02-05 15:56:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:39,325 INFO L225 Difference]: With dead ends: 58 [2025-02-05 15:56:39,325 INFO L226 Difference]: Without dead ends: 54 [2025-02-05 15:56:39,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:56:39,326 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:39,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 75 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-05 15:56:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2025-02-05 15:56:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (24), 11 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-05 15:56:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2025-02-05 15:56:39,339 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 147 [2025-02-05 15:56:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:39,340 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2025-02-05 15:56:39,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.727272727272727) internal successors, (41), 13 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2025-02-05 15:56:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2025-02-05 15:56:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2025-02-05 15:56:39,344 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:39,344 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 37, 22, 22, 22, 22, 22, 22, 22, 15, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:39,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 15:56:39,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:39,551 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:39,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash 636404269, now seen corresponding path program 7 times [2025-02-05 15:56:39,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:39,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630332039] [2025-02-05 15:56:39,552 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:56:39,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:39,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 311 statements into 1 equivalence classes. [2025-02-05 15:56:39,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 311 of 311 statements. [2025-02-05 15:56:39,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:39,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 534 proven. 907 refuted. 0 times theorem prover too weak. 4109 trivial. 0 not checked. [2025-02-05 15:56:40,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:40,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630332039] [2025-02-05 15:56:40,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630332039] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:40,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534277253] [2025-02-05 15:56:40,023 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:56:40,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:40,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:40,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:40,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:56:40,088 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 311 statements into 1 equivalence classes. [2025-02-05 15:56:40,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 311 of 311 statements. [2025-02-05 15:56:40,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:40,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:40,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:56:40,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 164 proven. 1124 refuted. 0 times theorem prover too weak. 4262 trivial. 0 not checked. [2025-02-05 15:56:40,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 164 proven. 1164 refuted. 0 times theorem prover too weak. 4222 trivial. 0 not checked. [2025-02-05 15:56:41,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534277253] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:41,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:41,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 15] total 26 [2025-02-05 15:56:41,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801312312] [2025-02-05 15:56:41,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:41,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 15:56:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:41,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 15:56:41,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:56:41,845 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 26 states, 24 states have (on average 3.125) internal successors, (75), 26 states have internal predecessors, (75), 20 states have call successors, (24), 1 states have call predecessors, (24), 12 states have return successors, (32), 14 states have call predecessors, (32), 20 states have call successors, (32) [2025-02-05 15:56:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:42,234 INFO L93 Difference]: Finished difference Result 130 states and 243 transitions. [2025-02-05 15:56:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 15:56:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.125) internal successors, (75), 26 states have internal predecessors, (75), 20 states have call successors, (24), 1 states have call predecessors, (24), 12 states have return successors, (32), 14 states have call predecessors, (32), 20 states have call successors, (32) Word has length 311 [2025-02-05 15:56:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:42,237 INFO L225 Difference]: With dead ends: 130 [2025-02-05 15:56:42,240 INFO L226 Difference]: Without dead ends: 84 [2025-02-05 15:56:42,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 607 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=432, Invalid=1374, Unknown=0, NotChecked=0, Total=1806 [2025-02-05 15:56:42,242 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 160 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:42,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 176 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:56:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-05 15:56:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2025-02-05 15:56:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 states have internal predecessors, (55), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (33), 13 states have call predecessors, (33), 14 states have call successors, (33) [2025-02-05 15:56:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2025-02-05 15:56:42,258 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 311 [2025-02-05 15:56:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:42,258 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2025-02-05 15:56:42,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.125) internal successors, (75), 26 states have internal predecessors, (75), 20 states have call successors, (24), 1 states have call predecessors, (24), 12 states have return successors, (32), 14 states have call predecessors, (32), 20 states have call successors, (32) [2025-02-05 15:56:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2025-02-05 15:56:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2025-02-05 15:56:42,262 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:42,262 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:42,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 15:56:42,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:42,463 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:42,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1946424999, now seen corresponding path program 8 times [2025-02-05 15:56:42,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:42,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136042934] [2025-02-05 15:56:42,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:42,477 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 283 statements into 2 equivalence classes. [2025-02-05 15:56:42,502 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 283 of 283 statements. [2025-02-05 15:56:42,503 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:42,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2025-02-05 15:56:42,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:42,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136042934] [2025-02-05 15:56:42,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136042934] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:42,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857824553] [2025-02-05 15:56:42,836 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:42,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:42,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:42,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:42,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 15:56:42,912 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 283 statements into 2 equivalence classes. [2025-02-05 15:56:42,977 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 283 of 283 statements. [2025-02-05 15:56:42,977 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:42,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:42,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:56:42,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2025-02-05 15:56:43,059 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2025-02-05 15:56:44,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857824553] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:44,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:44,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2025-02-05 15:56:44,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881249315] [2025-02-05 15:56:44,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:44,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 15:56:44,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:44,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 15:56:44,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:56:44,846 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-02-05 15:56:44,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:44,985 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2025-02-05 15:56:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:56:44,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 283 [2025-02-05 15:56:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:44,987 INFO L225 Difference]: With dead ends: 86 [2025-02-05 15:56:44,987 INFO L226 Difference]: Without dead ends: 82 [2025-02-05 15:56:44,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 557 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:56:44,988 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 108 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:44,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 99 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-05 15:56:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-02-05 15:56:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (42), 15 states have call predecessors, (42), 15 states have call successors, (42) [2025-02-05 15:56:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2025-02-05 15:56:45,008 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 283 [2025-02-05 15:56:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:45,009 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2025-02-05 15:56:45,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-02-05 15:56:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2025-02-05 15:56:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2025-02-05 15:56:45,019 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:45,019 INFO L218 NwaCegarLoop]: trace histogram [87, 87, 70, 43, 43, 43, 43, 43, 43, 43, 27, 17, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:45,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 15:56:45,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:45,220 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:45,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1691816878, now seen corresponding path program 9 times [2025-02-05 15:56:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:45,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306421671] [2025-02-05 15:56:45,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:56:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:45,241 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 596 statements into 78 equivalence classes. [2025-02-05 15:56:45,296 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) and asserted 273 of 596 statements. [2025-02-05 15:56:45,296 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2025-02-05 15:56:45,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20991 backedges. 2834 proven. 256 refuted. 0 times theorem prover too weak. 17901 trivial. 0 not checked. [2025-02-05 15:56:45,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:45,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306421671] [2025-02-05 15:56:45,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306421671] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:45,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394517210] [2025-02-05 15:56:45,654 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:56:45,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:45,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:45,658 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:45,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 15:56:45,785 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 596 statements into 78 equivalence classes. [2025-02-05 15:56:45,868 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) and asserted 273 of 596 statements. [2025-02-05 15:56:45,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2025-02-05 15:56:45,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:45,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:56:45,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20991 backedges. 3146 proven. 296 refuted. 0 times theorem prover too weak. 17549 trivial. 0 not checked. [2025-02-05 15:56:45,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20991 backedges. 3148 proven. 315 refuted. 0 times theorem prover too weak. 17528 trivial. 0 not checked. [2025-02-05 15:56:47,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394517210] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:47,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:47,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 24 [2025-02-05 15:56:47,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125312337] [2025-02-05 15:56:47,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:47,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 15:56:47,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:47,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 15:56:47,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2025-02-05 15:56:47,993 INFO L87 Difference]: Start difference. First operand 82 states and 115 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 12 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (26), 14 states have call predecessors, (26), 12 states have call successors, (26) [2025-02-05 15:56:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:48,223 INFO L93 Difference]: Finished difference Result 177 states and 268 transitions. [2025-02-05 15:56:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-05 15:56:48,224 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 12 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (26), 14 states have call predecessors, (26), 12 states have call successors, (26) Word has length 596 [2025-02-05 15:56:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:48,226 INFO L225 Difference]: With dead ends: 177 [2025-02-05 15:56:48,226 INFO L226 Difference]: Without dead ends: 97 [2025-02-05 15:56:48,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1219 GetRequests, 1177 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 15:56:48,227 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:48,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 131 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-02-05 15:56:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2025-02-05 15:56:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 59 states have internal predecessors, (61), 16 states have call successors, (16), 11 states have call predecessors, (16), 9 states have return successors, (41), 15 states have call predecessors, (41), 16 states have call successors, (41) [2025-02-05 15:56:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2025-02-05 15:56:48,246 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 596 [2025-02-05 15:56:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:48,247 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2025-02-05 15:56:48,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 12 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (26), 14 states have call predecessors, (26), 12 states have call successors, (26) [2025-02-05 15:56:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2025-02-05 15:56:48,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2025-02-05 15:56:48,256 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:48,256 INFO L218 NwaCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:48,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 15:56:48,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 15:56:48,460 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:48,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash 281639384, now seen corresponding path program 10 times [2025-02-05 15:56:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:48,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262518081] [2025-02-05 15:56:48,461 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:56:48,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:48,475 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 528 statements into 2 equivalence classes. [2025-02-05 15:56:48,518 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 448 of 528 statements. [2025-02-05 15:56:48,518 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:56:48,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1087 proven. 3186 refuted. 0 times theorem prover too weak. 12134 trivial. 0 not checked. [2025-02-05 15:56:49,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:49,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262518081] [2025-02-05 15:56:49,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262518081] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:49,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439088006] [2025-02-05 15:56:49,174 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:56:49,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:49,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:49,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:49,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 15:56:49,288 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 528 statements into 2 equivalence classes. [2025-02-05 15:56:49,380 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 448 of 528 statements. [2025-02-05 15:56:49,381 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:56:49,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:49,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 15:56:49,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 8332 proven. 1855 refuted. 0 times theorem prover too weak. 6220 trivial. 0 not checked. [2025-02-05 15:56:49,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1254 proven. 3660 refuted. 0 times theorem prover too weak. 11493 trivial. 0 not checked. [2025-02-05 15:56:53,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439088006] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:53,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:53,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 32 [2025-02-05 15:56:53,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558005613] [2025-02-05 15:56:53,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:53,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 15:56:53,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:53,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 15:56:53,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:56:53,035 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) [2025-02-05 15:56:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:53,527 INFO L93 Difference]: Finished difference Result 187 states and 295 transitions. [2025-02-05 15:56:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 15:56:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) Word has length 528 [2025-02-05 15:56:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:53,529 INFO L225 Difference]: With dead ends: 187 [2025-02-05 15:56:53,529 INFO L226 Difference]: Without dead ends: 112 [2025-02-05 15:56:53,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1036 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=824, Invalid=2482, Unknown=0, NotChecked=0, Total=3306 [2025-02-05 15:56:53,531 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 176 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:53,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 189 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:56:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-02-05 15:56:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2025-02-05 15:56:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 73 states have internal predecessors, (77), 20 states have call successors, (20), 16 states have call predecessors, (20), 9 states have return successors, (45), 15 states have call predecessors, (45), 20 states have call successors, (45) [2025-02-05 15:56:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2025-02-05 15:56:53,550 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 528 [2025-02-05 15:56:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:53,551 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2025-02-05 15:56:53,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) [2025-02-05 15:56:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2025-02-05 15:56:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2025-02-05 15:56:53,555 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:53,555 INFO L218 NwaCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:53,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 15:56:53,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 15:56:53,756 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:53,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2121070825, now seen corresponding path program 11 times [2025-02-05 15:56:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:53,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823005366] [2025-02-05 15:56:53,756 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:56:53,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:53,773 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 569 statements into 78 equivalence classes. [2025-02-05 15:56:53,911 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) and asserted 529 of 569 statements. [2025-02-05 15:56:53,911 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2025-02-05 15:56:53,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 2669 proven. 2765 refuted. 0 times theorem prover too weak. 13669 trivial. 0 not checked. [2025-02-05 15:56:54,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823005366] [2025-02-05 15:56:54,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823005366] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321788596] [2025-02-05 15:56:54,824 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:56:54,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:54,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:54,827 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:54,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 15:56:55,000 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 569 statements into 78 equivalence classes. [2025-02-05 15:56:55,228 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) and asserted 529 of 569 statements. [2025-02-05 15:56:55,229 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2025-02-05 15:56:55,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:55,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-05 15:56:55,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 2649 proven. 2769 refuted. 0 times theorem prover too weak. 13685 trivial. 0 not checked. [2025-02-05 15:56:55,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 2657 proven. 2852 refuted. 0 times theorem prover too weak. 13594 trivial. 0 not checked. [2025-02-05 15:56:58,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321788596] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:58,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:58,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 33 [2025-02-05 15:56:58,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988396728] [2025-02-05 15:56:58,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:58,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-05 15:56:58,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:58,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-05 15:56:58,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 15:56:58,906 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 27 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (41), 17 states have call predecessors, (41), 27 states have call successors, (41) [2025-02-05 15:56:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:59,538 INFO L93 Difference]: Finished difference Result 258 states and 402 transitions. [2025-02-05 15:56:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-02-05 15:56:59,539 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 27 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (41), 17 states have call predecessors, (41), 27 states have call successors, (41) Word has length 569 [2025-02-05 15:56:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:59,543 INFO L225 Difference]: With dead ends: 258 [2025-02-05 15:56:59,543 INFO L226 Difference]: Without dead ends: 151 [2025-02-05 15:56:59,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 1121 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1210, Invalid=3760, Unknown=0, NotChecked=0, Total=4970 [2025-02-05 15:56:59,547 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 239 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:59,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 192 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:56:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2025-02-05 15:56:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 119. [2025-02-05 15:56:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 83 states have internal predecessors, (87), 24 states have call successors, (24), 19 states have call predecessors, (24), 9 states have return successors, (60), 16 states have call predecessors, (60), 24 states have call successors, (60) [2025-02-05 15:56:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 171 transitions. [2025-02-05 15:56:59,560 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 171 transitions. Word has length 569 [2025-02-05 15:56:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:59,561 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 171 transitions. [2025-02-05 15:56:59,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 27 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (41), 17 states have call predecessors, (41), 27 states have call successors, (41) [2025-02-05 15:56:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 171 transitions. [2025-02-05 15:56:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2025-02-05 15:56:59,564 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:59,564 INFO L218 NwaCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:59,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-05 15:56:59,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:59,765 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:59,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:59,765 INFO L85 PathProgramCache]: Analyzing trace with hash 277520530, now seen corresponding path program 12 times [2025-02-05 15:56:59,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:59,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709303104] [2025-02-05 15:56:59,765 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:56:59,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:59,780 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 460 statements into 54 equivalence classes. [2025-02-05 15:56:59,808 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 221 of 460 statements. [2025-02-05 15:56:59,809 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:56:59,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 525 proven. 1830 refuted. 0 times theorem prover too weak. 10032 trivial. 0 not checked. [2025-02-05 15:57:00,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:00,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709303104] [2025-02-05 15:57:00,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709303104] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:00,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474023376] [2025-02-05 15:57:00,178 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:57:00,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:00,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:00,181 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:00,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 15:57:00,351 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 460 statements into 54 equivalence classes. [2025-02-05 15:57:00,411 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 221 of 460 statements. [2025-02-05 15:57:00,411 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:57:00,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:00,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:57:00,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 508 proven. 1816 refuted. 0 times theorem prover too weak. 10063 trivial. 0 not checked. [2025-02-05 15:57:00,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 512 proven. 1869 refuted. 0 times theorem prover too weak. 10006 trivial. 0 not checked. [2025-02-05 15:57:02,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474023376] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:02,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:02,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 17] total 27 [2025-02-05 15:57:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804404131] [2025-02-05 15:57:02,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:02,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 15:57:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:02,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 15:57:02,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:57:02,393 INFO L87 Difference]: Start difference. First operand 119 states and 171 transitions. Second operand has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) [2025-02-05 15:57:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:02,841 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2025-02-05 15:57:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-05 15:57:02,841 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) Word has length 460 [2025-02-05 15:57:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:02,844 INFO L225 Difference]: With dead ends: 146 [2025-02-05 15:57:02,844 INFO L226 Difference]: Without dead ends: 142 [2025-02-05 15:57:02,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 908 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=645, Invalid=1517, Unknown=0, NotChecked=0, Total=2162 [2025-02-05 15:57:02,845 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 118 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:02,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 128 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:57:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-02-05 15:57:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 122. [2025-02-05 15:57:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 85 states have internal predecessors, (89), 24 states have call successors, (24), 19 states have call predecessors, (24), 10 states have return successors, (65), 17 states have call predecessors, (65), 24 states have call successors, (65) [2025-02-05 15:57:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 178 transitions. [2025-02-05 15:57:02,875 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 178 transitions. Word has length 460 [2025-02-05 15:57:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:02,875 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 178 transitions. [2025-02-05 15:57:02,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) [2025-02-05 15:57:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 178 transitions. [2025-02-05 15:57:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1251 [2025-02-05 15:57:02,883 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:02,884 INFO L218 NwaCegarLoop]: trace histogram [183, 183, 148, 91, 91, 91, 91, 91, 91, 91, 57, 35, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:02,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-05 15:57:03,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:03,084 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:03,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:03,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1411611102, now seen corresponding path program 13 times [2025-02-05 15:57:03,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:03,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643364576] [2025-02-05 15:57:03,085 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:57:03,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:03,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1250 statements into 1 equivalence classes. [2025-02-05 15:57:03,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1250 of 1250 statements. [2025-02-05 15:57:03,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:03,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 93870 backedges. 844 proven. 7917 refuted. 0 times theorem prover too weak. 85109 trivial. 0 not checked. [2025-02-05 15:57:04,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:04,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643364576] [2025-02-05 15:57:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643364576] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:04,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867979516] [2025-02-05 15:57:04,917 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:57:04,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:04,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:04,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 15:57:05,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1250 statements into 1 equivalence classes. [2025-02-05 15:57:05,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1250 of 1250 statements. [2025-02-05 15:57:05,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:05,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:05,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 2795 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:57:05,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 93870 backedges. 844 proven. 7917 refuted. 0 times theorem prover too weak. 85109 trivial. 0 not checked. [2025-02-05 15:57:05,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 93870 backedges. 844 proven. 8017 refuted. 0 times theorem prover too weak. 85009 trivial. 0 not checked. [2025-02-05 15:57:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867979516] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:10,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:10,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2025-02-05 15:57:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368993394] [2025-02-05 15:57:10,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:10,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:57:10,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:10,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:57:10,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:10,729 INFO L87 Difference]: Start difference. First operand 122 states and 178 transitions. Second operand has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 20 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 10 states have call predecessors, (28), 20 states have call successors, (28) [2025-02-05 15:57:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:10,916 INFO L93 Difference]: Finished difference Result 131 states and 200 transitions. [2025-02-05 15:57:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:10,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 20 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 10 states have call predecessors, (28), 20 states have call successors, (28) Word has length 1250 [2025-02-05 15:57:10,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:10,921 INFO L225 Difference]: With dead ends: 131 [2025-02-05 15:57:10,921 INFO L226 Difference]: Without dead ends: 127 [2025-02-05 15:57:10,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2527 GetRequests, 2489 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2025-02-05 15:57:10,922 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:10,922 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 115 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-02-05 15:57:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2025-02-05 15:57:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 88 states have internal predecessors, (92), 25 states have call successors, (25), 19 states have call predecessors, (25), 11 states have return successors, (76), 19 states have call predecessors, (76), 25 states have call successors, (76) [2025-02-05 15:57:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2025-02-05 15:57:10,937 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 1250 [2025-02-05 15:57:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:10,937 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2025-02-05 15:57:10,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 20 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 10 states have call predecessors, (28), 20 states have call successors, (28) [2025-02-05 15:57:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2025-02-05 15:57:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1319 [2025-02-05 15:57:10,948 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:10,948 INFO L218 NwaCegarLoop]: trace histogram [193, 193, 156, 96, 96, 96, 96, 96, 96, 96, 60, 37, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:10,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:11,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 15:57:11,150 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:11,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash -989677942, now seen corresponding path program 14 times [2025-02-05 15:57:11,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:11,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063502970] [2025-02-05 15:57:11,151 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:11,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:11,183 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1318 statements into 2 equivalence classes. [2025-02-05 15:57:11,354 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1318 of 1318 statements. [2025-02-05 15:57:11,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:11,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 104442 backedges. 1260 proven. 9020 refuted. 0 times theorem prover too weak. 94162 trivial. 0 not checked. [2025-02-05 15:57:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063502970] [2025-02-05 15:57:13,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063502970] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724748382] [2025-02-05 15:57:13,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:13,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:13,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:13,047 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:13,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 15:57:13,310 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1318 statements into 2 equivalence classes. [2025-02-05 15:57:13,553 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1318 of 1318 statements. [2025-02-05 15:57:13,553 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:13,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:13,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 15:57:13,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 104442 backedges. 1260 proven. 9020 refuted. 0 times theorem prover too weak. 94162 trivial. 0 not checked. [2025-02-05 15:57:13,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 104442 backedges. 1260 proven. 9146 refuted. 0 times theorem prover too weak. 94036 trivial. 0 not checked. [2025-02-05 15:57:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724748382] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:19,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:19,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2025-02-05 15:57:19,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431303481] [2025-02-05 15:57:19,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:19,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 15:57:19,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:19,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 15:57:19,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:57:19,562 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2025-02-05 15:57:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:19,754 INFO L93 Difference]: Finished difference Result 136 states and 217 transitions. [2025-02-05 15:57:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 15:57:19,755 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1318 [2025-02-05 15:57:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:19,759 INFO L225 Difference]: With dead ends: 136 [2025-02-05 15:57:19,759 INFO L226 Difference]: Without dead ends: 132 [2025-02-05 15:57:19,760 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2666 GetRequests, 2624 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2025-02-05 15:57:19,760 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 186 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:19,761 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 118 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-05 15:57:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2025-02-05 15:57:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 93 states have (on average 1.021505376344086) internal successors, (95), 91 states have internal predecessors, (95), 26 states have call successors, (26), 19 states have call predecessors, (26), 12 states have return successors, (89), 21 states have call predecessors, (89), 26 states have call successors, (89) [2025-02-05 15:57:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 210 transitions. [2025-02-05 15:57:19,774 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 210 transitions. Word has length 1318 [2025-02-05 15:57:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:19,774 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 210 transitions. [2025-02-05 15:57:19,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2025-02-05 15:57:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 210 transitions. [2025-02-05 15:57:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3648 [2025-02-05 15:57:19,837 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:19,838 INFO L218 NwaCegarLoop]: trace histogram [535, 535, 433, 267, 267, 267, 267, 267, 267, 267, 166, 102, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:19,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-05 15:57:20,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 15:57:20,039 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:20,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash -616460265, now seen corresponding path program 15 times [2025-02-05 15:57:20,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:20,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619739305] [2025-02-05 15:57:20,040 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:20,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 3647 statements into 474 equivalence classes. [2025-02-05 15:57:20,145 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) and asserted 385 of 3647 statements. [2025-02-05 15:57:20,146 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2025-02-05 15:57:20,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 806952 backedges. 3439 proven. 29020 refuted. 0 times theorem prover too weak. 774493 trivial. 0 not checked. [2025-02-05 15:57:20,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619739305] [2025-02-05 15:57:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619739305] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856849296] [2025-02-05 15:57:20,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:20,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:20,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:20,621 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:20,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 15:57:21,106 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 3647 statements into 474 equivalence classes. [2025-02-05 15:57:21,199 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) and asserted 385 of 3647 statements. [2025-02-05 15:57:21,199 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2025-02-05 15:57:21,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:21,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 15:57:21,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 806952 backedges. 3439 proven. 29020 refuted. 0 times theorem prover too weak. 774493 trivial. 0 not checked. [2025-02-05 15:57:21,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 806952 backedges. 3439 proven. 29175 refuted. 0 times theorem prover too weak. 774338 trivial. 0 not checked. [2025-02-05 15:57:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856849296] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:35,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:35,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2025-02-05 15:57:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499390475] [2025-02-05 15:57:35,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:35,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 15:57:35,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:35,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 15:57:35,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:57:35,067 INFO L87 Difference]: Start difference. First operand 132 states and 210 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-02-05 15:57:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:35,294 INFO L93 Difference]: Finished difference Result 141 states and 236 transitions. [2025-02-05 15:57:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:57:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 3647 [2025-02-05 15:57:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:35,301 INFO L225 Difference]: With dead ends: 141 [2025-02-05 15:57:35,301 INFO L226 Difference]: Without dead ends: 137 [2025-02-05 15:57:35,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7327 GetRequests, 7281 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 15:57:35,302 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:35,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 116 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-02-05 15:57:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2025-02-05 15:57:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 94 states have internal predecessors, (98), 27 states have call successors, (27), 19 states have call predecessors, (27), 13 states have return successors, (104), 23 states have call predecessors, (104), 27 states have call successors, (104) [2025-02-05 15:57:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 229 transitions. [2025-02-05 15:57:35,315 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 229 transitions. Word has length 3647 [2025-02-05 15:57:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:35,316 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 229 transitions. [2025-02-05 15:57:35,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-02-05 15:57:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 229 transitions. [2025-02-05 15:57:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4070 [2025-02-05 15:57:35,394 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:35,395 INFO L218 NwaCegarLoop]: trace histogram [597, 597, 483, 298, 298, 298, 298, 298, 298, 298, 185, 114, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:35,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:35,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 15:57:35,596 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:35,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:35,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1700476327, now seen corresponding path program 16 times [2025-02-05 15:57:35,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:35,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877681159] [2025-02-05 15:57:35,597 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:35,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:35,649 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 4069 statements into 2 equivalence classes. [2025-02-05 15:57:36,669 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 3469 of 4069 statements. [2025-02-05 15:57:36,669 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:36,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1005039 backedges. 10638 proven. 55032 refuted. 0 times theorem prover too weak. 939369 trivial. 0 not checked. [2025-02-05 15:57:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:48,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877681159] [2025-02-05 15:57:48,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877681159] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:48,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046170835] [2025-02-05 15:57:48,482 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:48,484 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:48,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 15:57:48,990 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 4069 statements into 2 equivalence classes. [2025-02-05 15:57:49,613 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 3469 of 4069 statements. [2025-02-05 15:57:49,614 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:49,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:49,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 7239 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-05 15:57:49,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1005039 backedges. 488246 proven. 15746 refuted. 0 times theorem prover too weak. 501047 trivial. 0 not checked. [2025-02-05 15:57:49,911 INFO L312 TraceCheckSpWp]: Computing backward predicates...