./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.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 d87fab1dc6e9b3b1ef38291e10411689fc961abba4e105f2586cc8da9615d8a6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:51:57,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:51:57,343 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:51:57,346 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:51:57,346 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:51:57,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:51:57,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:51:57,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:51:57,362 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:51:57,363 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:51:57,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:51:57,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:51:57,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:51:57,363 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:51:57,363 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:51:57,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:51:57,363 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:51:57,363 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:51:57,364 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:51:57,365 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:51:57,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:51:57,365 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:51:57,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:51:57,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:51:57,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:51:57,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:51:57,366 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 -> d87fab1dc6e9b3b1ef38291e10411689fc961abba4e105f2586cc8da9615d8a6 [2025-02-07 20:51:57,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:51:57,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:51:57,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:51:57,662 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:51:57,662 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:51:57,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2025-02-07 20:51:58,949 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/32288bdc1/aa25e9ea38f74f3ead2f22ba2430f96c/FLAG5dfce01f6 [2025-02-07 20:51:59,277 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:51:59,278 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2025-02-07 20:51:59,298 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/32288bdc1/aa25e9ea38f74f3ead2f22ba2430f96c/FLAG5dfce01f6 [2025-02-07 20:51:59,569 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/32288bdc1/aa25e9ea38f74f3ead2f22ba2430f96c [2025-02-07 20:51:59,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:51:59,577 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:51:59,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:51:59,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:51:59,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:51:59,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10eb664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59, skipping insertion in model container [2025-02-07 20:51:59,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,612 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:51:59,797 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/nla-digbench-scaling/prodbin-ll_unwindbound100.c[1263,1276] [2025-02-07 20:51:59,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:51:59,839 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:51:59,857 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/nla-digbench-scaling/prodbin-ll_unwindbound100.c[1263,1276] [2025-02-07 20:51:59,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:51:59,884 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:51:59,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59 WrapperNode [2025-02-07 20:51:59,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:51:59,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:51:59,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:51:59,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:51:59,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,910 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2025-02-07 20:51:59,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:51:59,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:51:59,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:51:59,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:51:59,917 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,921 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,928 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 20:51:59,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,932 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,936 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:51:59,938 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:51:59,938 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:51:59,938 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:51:59,939 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (1/1) ... [2025-02-07 20:51:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:51:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:51:59,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:51:59,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:51:59,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:51:59,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:51:59,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:52:00,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:52:00,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 20:52:00,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 20:52:00,038 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:52:00,039 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:52:00,150 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-07 20:52:00,151 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:52:00,159 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:52:00,159 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:52:00,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:52:00 BoogieIcfgContainer [2025-02-07 20:52:00,160 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:52:00,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:52:00,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:52:00,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:52:00,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:51:59" (1/3) ... [2025-02-07 20:52:00,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27433184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:52:00, skipping insertion in model container [2025-02-07 20:52:00,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:51:59" (2/3) ... [2025-02-07 20:52:00,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27433184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:52:00, skipping insertion in model container [2025-02-07 20:52:00,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:52:00" (3/3) ... [2025-02-07 20:52:00,173 INFO L128 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2025-02-07 20:52:00,183 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:52:00,184 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prodbin-ll_unwindbound100.c that has 2 procedures, 19 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-07 20:52:00,245 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:52:00,261 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;@45a9616f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:52:00,262 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:52:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:52:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 20:52:00,277 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:00,277 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:00,278 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:00,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1866924571, now seen corresponding path program 1 times [2025-02-07 20:52:00,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:00,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610592017] [2025-02-07 20:52:00,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:00,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:00,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 20:52:00,408 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:52:00,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:00,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:00,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:00,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610592017] [2025-02-07 20:52:00,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610592017] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:52:00,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:52:00,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 20:52:00,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248040845] [2025-02-07 20:52:00,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:52:00,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 20:52:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:00,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 20:52:00,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:52:00,514 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:52:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:00,539 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2025-02-07 20:52:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 20:52:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-07 20:52:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:00,551 INFO L225 Difference]: With dead ends: 36 [2025-02-07 20:52:00,554 INFO L226 Difference]: Without dead ends: 16 [2025-02-07 20:52:00,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:52:00,562 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:00,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:52:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-07 20:52:00,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-02-07 20:52:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 20:52:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2025-02-07 20:52:00,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2025-02-07 20:52:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:00,611 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2025-02-07 20:52:00,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:52:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2025-02-07 20:52:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 20:52:00,613 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:00,613 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:00,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:52:00,614 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:00,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash -554430939, now seen corresponding path program 1 times [2025-02-07 20:52:00,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:00,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549514969] [2025-02-07 20:52:00,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:00,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:52:00,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:52:00,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:00,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:52:00,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143073638] [2025-02-07 20:52:00,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:00,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:00,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:00,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:52:00,697 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:52:00,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:52:00,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:00,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:00,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 20:52:00,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:00,848 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:52:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:00,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549514969] [2025-02-07 20:52:00,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:52:00,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143073638] [2025-02-07 20:52:00,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143073638] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:52:00,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:52:00,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-07 20:52:00,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644356285] [2025-02-07 20:52:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:52:00,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:52:00,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:00,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:52:00,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:52:00,850 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:52:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:00,913 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2025-02-07 20:52:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:52:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-07 20:52:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:00,914 INFO L225 Difference]: With dead ends: 34 [2025-02-07 20:52:00,914 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 20:52:00,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:52:00,915 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:00,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:52:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 20:52:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2025-02-07 20:52:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:52:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2025-02-07 20:52:00,920 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2025-02-07 20:52:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:00,920 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2025-02-07 20:52:00,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:52:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2025-02-07 20:52:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 20:52:00,921 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:00,921 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:00,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-07 20:52:01,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:01,122 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:01,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash -553567000, now seen corresponding path program 1 times [2025-02-07 20:52:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:01,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434893706] [2025-02-07 20:52:01,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:01,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:52:01,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:52:01,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:01,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:01,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:01,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434893706] [2025-02-07 20:52:01,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434893706] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:52:01,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:52:01,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 20:52:01,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404151238] [2025-02-07 20:52:01,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:52:01,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:52:01,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:01,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:52:01,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:52:01,251 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:52:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:01,273 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2025-02-07 20:52:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:52:01,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-07 20:52:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:01,277 INFO L225 Difference]: With dead ends: 31 [2025-02-07 20:52:01,278 INFO L226 Difference]: Without dead ends: 24 [2025-02-07 20:52:01,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:52:01,278 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:01,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:52:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-07 20:52:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-07 20:52:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:52:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-02-07 20:52:01,287 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 9 [2025-02-07 20:52:01,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:01,287 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-02-07 20:52:01,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:52:01,287 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-02-07 20:52:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 20:52:01,287 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:01,287 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:01,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-07 20:52:01,287 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:01,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 471451980, now seen corresponding path program 1 times [2025-02-07 20:52:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:01,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279898116] [2025-02-07 20:52:01,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:01,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:01,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:52:01,327 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:52:01,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:01,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:52:01,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408527872] [2025-02-07 20:52:01,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:01,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:01,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:01,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:01,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:52:01,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:52:01,379 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:52:01,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:01,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:01,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 20:52:01,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:01,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:52:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:03,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:03,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279898116] [2025-02-07 20:52:03,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:52:03,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408527872] [2025-02-07 20:52:03,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408527872] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:52:03,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:52:03,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2025-02-07 20:52:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765951626] [2025-02-07 20:52:03,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:52:03,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-07 20:52:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:03,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-07 20:52:03,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-07 20:52:03,321 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:52:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:03,647 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2025-02-07 20:52:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 20:52:03,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2025-02-07 20:52:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:03,649 INFO L225 Difference]: With dead ends: 45 [2025-02-07 20:52:03,649 INFO L226 Difference]: Without dead ends: 43 [2025-02-07 20:52:03,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2025-02-07 20:52:03,650 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:03,650 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:52:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-02-07 20:52:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2025-02-07 20:52:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 20:52:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2025-02-07 20:52:03,656 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 19 [2025-02-07 20:52:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:03,656 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2025-02-07 20:52:03,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:52:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2025-02-07 20:52:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 20:52:03,657 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:03,657 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:03,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 20:52:03,862 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 [2025-02-07 20:52:03,862 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:03,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash 472315919, now seen corresponding path program 1 times [2025-02-07 20:52:03,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:03,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305804881] [2025-02-07 20:52:03,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:03,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:03,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:52:03,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:52:03,882 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:03,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:03,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:03,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305804881] [2025-02-07 20:52:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305804881] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:52:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943296908] [2025-02-07 20:52:03,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:03,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:03,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:04,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:52:04,023 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:52:04,034 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:52:04,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:04,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:04,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-07 20:52:04,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:04,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:52:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:04,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943296908] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:52:04,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:52:04,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2025-02-07 20:52:04,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845864383] [2025-02-07 20:52:04,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:52:04,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 20:52:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:04,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 20:52:04,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:52:04,099 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 20:52:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:04,158 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2025-02-07 20:52:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 20:52:04,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2025-02-07 20:52:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:04,160 INFO L225 Difference]: With dead ends: 90 [2025-02-07 20:52:04,160 INFO L226 Difference]: Without dead ends: 83 [2025-02-07 20:52:04,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:52:04,161 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:04,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:52:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-07 20:52:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2025-02-07 20:52:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 66 states have internal predecessors, (75), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-07 20:52:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2025-02-07 20:52:04,180 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 19 [2025-02-07 20:52:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:04,180 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2025-02-07 20:52:04,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 20:52:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2025-02-07 20:52:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 20:52:04,180 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:04,180 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:04,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:52:04,381 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 [2025-02-07 20:52:04,382 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:04,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2080704981, now seen corresponding path program 1 times [2025-02-07 20:52:04,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:04,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865920301] [2025-02-07 20:52:04,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:04,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:04,388 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:52:04,402 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:52:04,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:04,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:52:04,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441816911] [2025-02-07 20:52:04,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:04,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:04,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:04,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:04,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:52:04,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:52:04,464 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:52:04,464 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:04,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:04,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 20:52:04,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:04,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:52:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:05,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:05,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865920301] [2025-02-07 20:52:05,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:52:05,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441816911] [2025-02-07 20:52:05,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441816911] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:52:05,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:52:05,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2025-02-07 20:52:05,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74132407] [2025-02-07 20:52:05,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:52:05,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 20:52:05,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:05,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 20:52:05,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-02-07 20:52:05,275 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:52:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:05,747 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2025-02-07 20:52:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 20:52:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2025-02-07 20:52:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:05,749 INFO L225 Difference]: With dead ends: 114 [2025-02-07 20:52:05,749 INFO L226 Difference]: Without dead ends: 103 [2025-02-07 20:52:05,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2025-02-07 20:52:05,750 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:05,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 126 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:52:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-02-07 20:52:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2025-02-07 20:52:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 65 states have (on average 1.2) internal successors, (78), 67 states have internal predecessors, (78), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-07 20:52:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2025-02-07 20:52:05,774 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 19 [2025-02-07 20:52:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:05,774 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2025-02-07 20:52:05,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:52:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2025-02-07 20:52:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 20:52:05,774 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:05,774 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:05,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 20:52:05,978 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 [2025-02-07 20:52:05,979 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:05,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:05,979 INFO L85 PathProgramCache]: Analyzing trace with hash -966658665, now seen corresponding path program 1 times [2025-02-07 20:52:05,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:05,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273115322] [2025-02-07 20:52:05,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:05,987 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 20:52:06,002 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 20:52:06,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:06,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:52:06,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521356774] [2025-02-07 20:52:06,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:06,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:06,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:06,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:52:06,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 20:52:06,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 20:52:06,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:06,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:06,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 20:52:06,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:52:06,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:52:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:52:06,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:06,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273115322] [2025-02-07 20:52:06,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:52:06,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521356774] [2025-02-07 20:52:06,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521356774] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:52:06,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:52:06,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2025-02-07 20:52:06,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751191682] [2025-02-07 20:52:06,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:52:06,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 20:52:06,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:06,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 20:52:06,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:52:06,176 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-07 20:52:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:06,256 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2025-02-07 20:52:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:52:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2025-02-07 20:52:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:06,257 INFO L225 Difference]: With dead ends: 91 [2025-02-07 20:52:06,258 INFO L226 Difference]: Without dead ends: 81 [2025-02-07 20:52:06,259 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:52:06,259 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:06,259 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:52:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-02-07 20:52:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2025-02-07 20:52:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 65 states have internal predecessors, (72), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-07 20:52:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2025-02-07 20:52:06,271 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 25 [2025-02-07 20:52:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:06,271 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2025-02-07 20:52:06,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-07 20:52:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2025-02-07 20:52:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 20:52:06,273 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:06,273 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:06,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 20:52:06,477 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 [2025-02-07 20:52:06,477 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:06,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:06,478 INFO L85 PathProgramCache]: Analyzing trace with hash -208548295, now seen corresponding path program 1 times [2025-02-07 20:52:06,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:06,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323712261] [2025-02-07 20:52:06,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:06,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:06,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 20:52:06,519 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:52:06,520 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:06,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:52:06,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573814343] [2025-02-07 20:52:06,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:52:06,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:06,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:06,526 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:06,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 20:52:06,549 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 20:52:06,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:52:06,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:52:06,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:06,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-07 20:52:06,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:52:06,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:52:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-07 20:52:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323712261] [2025-02-07 20:52:09,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:52:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573814343] [2025-02-07 20:52:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573814343] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:52:09,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:52:09,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2025-02-07 20:52:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210743363] [2025-02-07 20:52:09,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:52:09,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 20:52:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:09,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 20:52:09,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2025-02-07 20:52:09,563 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 20:52:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:18,170 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2025-02-07 20:52:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 20:52:18,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2025-02-07 20:52:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:18,171 INFO L225 Difference]: With dead ends: 122 [2025-02-07 20:52:18,171 INFO L226 Difference]: Without dead ends: 120 [2025-02-07 20:52:18,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=168, Invalid=761, Unknown=1, NotChecked=0, Total=930 [2025-02-07 20:52:18,172 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:18,172 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-02-07 20:52:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-02-07 20:52:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2025-02-07 20:52:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 98 states have internal predecessors, (107), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-07 20:52:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2025-02-07 20:52:18,182 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 39 [2025-02-07 20:52:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:18,183 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2025-02-07 20:52:18,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 20:52:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2025-02-07 20:52:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 20:52:18,183 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:18,184 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:18,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 20:52:18,387 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 [2025-02-07 20:52:18,387 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:18,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1205620648, now seen corresponding path program 2 times [2025-02-07 20:52:18,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:18,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778097823] [2025-02-07 20:52:18,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:52:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:18,392 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-02-07 20:52:18,411 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:52:18,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:52:18,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:52:18,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868949048] [2025-02-07 20:52:18,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:52:18,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:18,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:18,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:18,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 20:52:18,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-02-07 20:52:18,456 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:52:18,456 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:52:18,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:18,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-07 20:52:18,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:52:18,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:52:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:52:30,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:30,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778097823] [2025-02-07 20:52:30,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:52:30,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868949048] [2025-02-07 20:52:30,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868949048] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:52:30,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:52:30,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2025-02-07 20:52:30,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041797199] [2025-02-07 20:52:30,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:52:30,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 20:52:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:30,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 20:52:30,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2025-02-07 20:52:30,413 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-07 20:52:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:40,928 INFO L93 Difference]: Finished difference Result 167 states and 201 transitions. [2025-02-07 20:52:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 20:52:40,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2025-02-07 20:52:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:40,930 INFO L225 Difference]: With dead ends: 167 [2025-02-07 20:52:40,930 INFO L226 Difference]: Without dead ends: 165 [2025-02-07 20:52:40,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 20:52:40,932 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:40,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 226 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2025-02-07 20:52:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2025-02-07 20:52:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 157. [2025-02-07 20:52:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 131 states have internal predecessors, (152), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2025-02-07 20:52:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2025-02-07 20:52:40,965 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 39 [2025-02-07 20:52:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:40,965 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2025-02-07 20:52:40,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-07 20:52:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2025-02-07 20:52:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-07 20:52:40,966 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:40,966 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:52:40,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 20:52:41,166 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 [2025-02-07 20:52:41,167 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:41,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:41,167 INFO L85 PathProgramCache]: Analyzing trace with hash 870370564, now seen corresponding path program 2 times [2025-02-07 20:52:41,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:41,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272245700] [2025-02-07 20:52:41,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:52:41,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:41,171 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-07 20:52:41,182 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 20:52:41,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:52:41,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:52:41,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:41,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272245700] [2025-02-07 20:52:41,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272245700] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:52:41,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136509688] [2025-02-07 20:52:41,396 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:52:41,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:41,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:41,400 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:41,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 20:52:41,432 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-07 20:52:41,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 20:52:41,452 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:52:41,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:41,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:52:41,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:52:41,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:52:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:52:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136509688] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:52:41,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:52:41,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 17 [2025-02-07 20:52:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612924191] [2025-02-07 20:52:41,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:52:41,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 20:52:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:41,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 20:52:41,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2025-02-07 20:52:41,595 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-02-07 20:52:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:41,729 INFO L93 Difference]: Finished difference Result 394 states and 464 transitions. [2025-02-07 20:52:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 20:52:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 49 [2025-02-07 20:52:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:41,731 INFO L225 Difference]: With dead ends: 394 [2025-02-07 20:52:41,731 INFO L226 Difference]: Without dead ends: 387 [2025-02-07 20:52:41,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2025-02-07 20:52:41,732 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:41,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 147 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:52:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2025-02-07 20:52:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 343. [2025-02-07 20:52:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 274 states have (on average 1.1423357664233578) internal successors, (313), 281 states have internal predecessors, (313), 36 states have call successors, (36), 32 states have call predecessors, (36), 32 states have return successors, (35), 29 states have call predecessors, (35), 35 states have call successors, (35) [2025-02-07 20:52:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 384 transitions. [2025-02-07 20:52:41,795 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 384 transitions. Word has length 49 [2025-02-07 20:52:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:41,795 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 384 transitions. [2025-02-07 20:52:41,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-02-07 20:52:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 384 transitions. [2025-02-07 20:52:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-07 20:52:41,796 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:41,796 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2025-02-07 20:52:41,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 20:52:42,001 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 [2025-02-07 20:52:42,001 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:42,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:42,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1301655235, now seen corresponding path program 2 times [2025-02-07 20:52:42,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:42,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431294154] [2025-02-07 20:52:42,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:52:42,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:42,007 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-07 20:52:42,034 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 20:52:42,034 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:52:42,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:52:42,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224726301] [2025-02-07 20:52:42,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:52:42,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:42,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:42,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:42,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 20:52:42,064 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-07 20:52:42,079 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 20:52:42,079 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:52:42,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:42,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-07 20:52:42,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 20:52:42,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:52:43,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:52:43,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431294154] [2025-02-07 20:52:43,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:52:43,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224726301] [2025-02-07 20:52:43,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224726301] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:52:43,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:52:43,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-02-07 20:52:43,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125602699] [2025-02-07 20:52:43,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:52:43,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 20:52:43,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:52:43,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 20:52:43,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2025-02-07 20:52:43,844 INFO L87 Difference]: Start difference. First operand 343 states and 384 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 20:52:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:52:44,174 INFO L93 Difference]: Finished difference Result 345 states and 385 transitions. [2025-02-07 20:52:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 20:52:44,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2025-02-07 20:52:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:52:44,176 INFO L225 Difference]: With dead ends: 345 [2025-02-07 20:52:44,176 INFO L226 Difference]: Without dead ends: 343 [2025-02-07 20:52:44,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2025-02-07 20:52:44,177 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:52:44,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 213 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:52:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2025-02-07 20:52:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2025-02-07 20:52:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 274 states have (on average 1.1386861313868613) internal successors, (312), 281 states have internal predecessors, (312), 36 states have call successors, (36), 32 states have call predecessors, (36), 32 states have return successors, (35), 29 states have call predecessors, (35), 35 states have call successors, (35) [2025-02-07 20:52:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 383 transitions. [2025-02-07 20:52:44,199 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 383 transitions. Word has length 49 [2025-02-07 20:52:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:52:44,199 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 383 transitions. [2025-02-07 20:52:44,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 20:52:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 383 transitions. [2025-02-07 20:52:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-07 20:52:44,200 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:52:44,200 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2025-02-07 20:52:44,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 20:52:44,404 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 [2025-02-07 20:52:44,404 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:52:44,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:52:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash -869647549, now seen corresponding path program 3 times [2025-02-07 20:52:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:52:44,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268451807] [2025-02-07 20:52:44,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:52:44,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:52:44,411 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 6 equivalence classes. [2025-02-07 20:52:44,433 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 59 of 59 statements. [2025-02-07 20:52:44,433 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:52:44,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:52:44,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994920309] [2025-02-07 20:52:44,434 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:52:44,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:52:44,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:52:44,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:52:44,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 20:52:44,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 6 equivalence classes. [2025-02-07 20:52:44,502 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 59 of 59 statements. [2025-02-07 20:52:44,502 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:52:44,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:52:44,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 20:52:44,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:52:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 95 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 20:52:45,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:53:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 95 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 20:53:37,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:53:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268451807] [2025-02-07 20:53:37,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:53:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994920309] [2025-02-07 20:53:37,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994920309] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:53:37,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:53:37,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2025-02-07 20:53:37,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014781136] [2025-02-07 20:53:37,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:53:37,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-07 20:53:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:53:37,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-07 20:53:37,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=955, Unknown=1, NotChecked=0, Total=1190 [2025-02-07 20:53:37,211 INFO L87 Difference]: Start difference. First operand 343 states and 383 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)