./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 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/hardware-verification-bv/btor2c-lazyMod.factorial4even.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash a9bfc0bfd402f01a909df8198af653a6c40e8b771ded2d89ed782f9da2aa5bbb --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 07:13:57,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 07:13:57,210 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-01-09 07:13:57,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 07:13:57,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 07:13:57,238 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 07:13:57,240 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 07:13:57,240 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 07:13:57,240 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 07:13:57,240 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 07:13:57,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 07:13:57,241 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 07:13:57,241 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 07:13:57,242 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 07:13:57,242 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 07:13:57,242 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 07:13:57,242 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 07:13:57,242 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 07:13:57,242 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 07:13:57,243 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 07:13:57,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 07:13:57,243 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 07:13:57,244 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 07:13:57,244 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 07:13:57,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 07:13:57,245 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9bfc0bfd402f01a909df8198af653a6c40e8b771ded2d89ed782f9da2aa5bbb [2025-01-09 07:13:57,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 07:13:57,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 07:13:57,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 07:13:57,608 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 07:13:57,609 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 07:13:57,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c [2025-01-09 07:13:58,764 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18e34202d/bc22b45e148b44c8ab7b8adbe69341f7/FLAG038e935eb [2025-01-09 07:13:59,000 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 07:13:59,001 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c [2025-01-09 07:13:59,012 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18e34202d/bc22b45e148b44c8ab7b8adbe69341f7/FLAG038e935eb [2025-01-09 07:13:59,333 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18e34202d/bc22b45e148b44c8ab7b8adbe69341f7 [2025-01-09 07:13:59,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 07:13:59,337 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 07:13:59,339 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 07:13:59,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 07:13:59,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 07:13:59,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fbc0b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59, skipping insertion in model container [2025-01-09 07:13:59,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,358 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 07:13:59,467 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/hardware-verification-bv/btor2c-lazyMod.factorial4even.c[1439,1452] [2025-01-09 07:13:59,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 07:13:59,503 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 07:13:59,512 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/hardware-verification-bv/btor2c-lazyMod.factorial4even.c[1439,1452] [2025-01-09 07:13:59,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 07:13:59,534 INFO L204 MainTranslator]: Completed translation [2025-01-09 07:13:59,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59 WrapperNode [2025-01-09 07:13:59,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 07:13:59,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 07:13:59,537 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 07:13:59,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 07:13:59,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,573 INFO L138 Inliner]: procedures = 17, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 97 [2025-01-09 07:13:59,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 07:13:59,578 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 07:13:59,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 07:13:59,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 07:13:59,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,591 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,604 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]. [2025-01-09 07:13:59,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,610 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,622 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,628 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 07:13:59,629 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 07:13:59,629 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 07:13:59,629 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 07:13:59,630 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (1/1) ... [2025-01-09 07:13:59,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 07:13:59,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 07:13:59,657 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) [2025-01-09 07:13:59,660 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 [2025-01-09 07:13:59,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 07:13:59,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 07:13:59,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 07:13:59,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 07:13:59,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 07:13:59,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 07:13:59,728 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 07:13:59,730 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 07:13:59,953 INFO L? ?]: Removed 41 outVars from TransFormulas that were not future-live. [2025-01-09 07:13:59,953 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 07:13:59,965 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 07:13:59,965 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 07:13:59,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 07:13:59 BoogieIcfgContainer [2025-01-09 07:13:59,965 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 07:13:59,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 07:13:59,969 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 07:13:59,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 07:13:59,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 07:13:59" (1/3) ... [2025-01-09 07:13:59,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1c1d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 07:13:59, skipping insertion in model container [2025-01-09 07:13:59,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 07:13:59" (2/3) ... [2025-01-09 07:13:59,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1c1d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 07:13:59, skipping insertion in model container [2025-01-09 07:13:59,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 07:13:59" (3/3) ... [2025-01-09 07:13:59,974 INFO L128 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.factorial4even.c [2025-01-09 07:13:59,984 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 07:13:59,986 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG btor2c-lazyMod.factorial4even.c that has 2 procedures, 36 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-01-09 07:14:00,024 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 07:14:00,032 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;@1e34f5ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 07:14:00,033 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 07:14:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 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) [2025-01-09 07:14:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 07:14:00,039 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:00,040 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:00,040 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:00,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash -709743488, now seen corresponding path program 1 times [2025-01-09 07:14:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:00,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892058488] [2025-01-09 07:14:00,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:00,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 07:14:00,143 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 07:14:00,145 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:00,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 07:14:00,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:00,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892058488] [2025-01-09 07:14:00,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892058488] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 07:14:00,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 07:14:00,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-09 07:14:00,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009480217] [2025-01-09 07:14:00,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 07:14:00,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 07:14:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:00,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 07:14:00,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-01-09 07:14:00,528 INFO L87 Difference]: Start difference. First operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 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 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2025-01-09 07:14:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:00,626 INFO L93 Difference]: Finished difference Result 80 states and 114 transitions. [2025-01-09 07:14:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 07:14:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 11 [2025-01-09 07:14:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:00,632 INFO L225 Difference]: With dead ends: 80 [2025-01-09 07:14:00,632 INFO L226 Difference]: Without dead ends: 54 [2025-01-09 07:14:00,634 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-01-09 07:14:00,636 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 93 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:00,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 183 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 07:14:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-01-09 07:14:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2025-01-09 07:14:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 34 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 07:14:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2025-01-09 07:14:00,667 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 11 [2025-01-09 07:14:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:00,667 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2025-01-09 07:14:00,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2025-01-09 07:14:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2025-01-09 07:14:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-01-09 07:14:00,668 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:00,668 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:00,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 07:14:00,669 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:00,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 831864686, now seen corresponding path program 1 times [2025-01-09 07:14:00,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:00,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323837813] [2025-01-09 07:14:00,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:00,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:00,681 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 07:14:00,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 07:14:00,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:00,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 07:14:00,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:00,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323837813] [2025-01-09 07:14:00,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323837813] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 07:14:00,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 07:14:00,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 07:14:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317270004] [2025-01-09 07:14:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 07:14:00,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 07:14:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:00,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 07:14:00,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 07:14:00,832 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 07:14:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:00,875 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2025-01-09 07:14:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 07:14:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2025-01-09 07:14:00,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:00,879 INFO L225 Difference]: With dead ends: 52 [2025-01-09 07:14:00,880 INFO L226 Difference]: Without dead ends: 50 [2025-01-09 07:14:00,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 07:14:00,882 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:00,883 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 203 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 07:14:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-01-09 07:14:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2025-01-09 07:14:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 07:14:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2025-01-09 07:14:00,889 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 21 [2025-01-09 07:14:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:00,889 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2025-01-09 07:14:00,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 07:14:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2025-01-09 07:14:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-01-09 07:14:00,889 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:00,889 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:00,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 07:14:00,890 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:00,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1618847807, now seen corresponding path program 1 times [2025-01-09 07:14:00,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:00,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645906270] [2025-01-09 07:14:00,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:00,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-09 07:14:00,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-09 07:14:00,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:00,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 07:14:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645906270] [2025-01-09 07:14:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645906270] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 07:14:00,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 07:14:00,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 07:14:00,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136186611] [2025-01-09 07:14:00,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 07:14:00,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 07:14:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:00,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 07:14:00,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 07:14:00,967 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 07:14:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:01,000 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2025-01-09 07:14:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 07:14:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2025-01-09 07:14:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:01,001 INFO L225 Difference]: With dead ends: 76 [2025-01-09 07:14:01,002 INFO L226 Difference]: Without dead ends: 47 [2025-01-09 07:14:01,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 07:14:01,003 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:01,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 07:14:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-01-09 07:14:01,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2025-01-09 07:14:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 41 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 07:14:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2025-01-09 07:14:01,009 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 22 [2025-01-09 07:14:01,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:01,009 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2025-01-09 07:14:01,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 07:14:01,010 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2025-01-09 07:14:01,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-01-09 07:14:01,010 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:01,010 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:01,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 07:14:01,010 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:01,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash 33163303, now seen corresponding path program 1 times [2025-01-09 07:14:01,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:01,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660910958] [2025-01-09 07:14:01,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:01,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:01,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 07:14:01,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 07:14:01,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:01,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 07:14:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:01,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660910958] [2025-01-09 07:14:01,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660910958] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 07:14:01,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 07:14:01,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 07:14:01,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799704452] [2025-01-09 07:14:01,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 07:14:01,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 07:14:01,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:01,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 07:14:01,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 07:14:01,244 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 07:14:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:01,327 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2025-01-09 07:14:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 07:14:01,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2025-01-09 07:14:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:01,330 INFO L225 Difference]: With dead ends: 89 [2025-01-09 07:14:01,330 INFO L226 Difference]: Without dead ends: 58 [2025-01-09 07:14:01,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-01-09 07:14:01,330 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 54 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:01,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 148 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 07:14:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-01-09 07:14:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2025-01-09 07:14:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 07:14:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2025-01-09 07:14:01,340 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 23 [2025-01-09 07:14:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:01,340 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2025-01-09 07:14:01,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 07:14:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2025-01-09 07:14:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-09 07:14:01,341 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:01,341 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:01,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 07:14:01,341 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:01,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1667006976, now seen corresponding path program 1 times [2025-01-09 07:14:01,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:01,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883456538] [2025-01-09 07:14:01,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:01,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:01,351 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 07:14:01,363 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 07:14:01,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:01,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 07:14:01,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883456538] [2025-01-09 07:14:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883456538] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 07:14:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874725922] [2025-01-09 07:14:01,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:01,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:01,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 07:14:01,560 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) [2025-01-09 07:14:01,562 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 [2025-01-09 07:14:01,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 07:14:01,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 07:14:01,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:01,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:01,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-01-09 07:14:01,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 07:14:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 07:14:01,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 07:14:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 07:14:02,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874725922] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 07:14:02,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 07:14:02,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 23 [2025-01-09 07:14:02,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520908384] [2025-01-09 07:14:02,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 07:14:02,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 07:14:02,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:02,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 07:14:02,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2025-01-09 07:14:02,069 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 23 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 22 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-09 07:14:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:02,287 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2025-01-09 07:14:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 07:14:02,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 22 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 30 [2025-01-09 07:14:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:02,288 INFO L225 Difference]: With dead ends: 88 [2025-01-09 07:14:02,289 INFO L226 Difference]: Without dead ends: 86 [2025-01-09 07:14:02,289 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2025-01-09 07:14:02,289 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 334 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:02,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 342 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 07:14:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-01-09 07:14:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2025-01-09 07:14:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 07:14:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-01-09 07:14:02,295 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 30 [2025-01-09 07:14:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:02,296 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-01-09 07:14:02,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 22 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-09 07:14:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-01-09 07:14:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-01-09 07:14:02,296 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:02,297 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:02,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 07:14:02,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:02,501 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:02,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash 86460636, now seen corresponding path program 1 times [2025-01-09 07:14:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:02,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533145000] [2025-01-09 07:14:02,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:02,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:02,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-09 07:14:02,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 07:14:02,537 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:02,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 07:14:02,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:02,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533145000] [2025-01-09 07:14:02,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533145000] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 07:14:02,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 07:14:02,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 07:14:02,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383112206] [2025-01-09 07:14:02,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 07:14:02,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 07:14:02,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:02,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 07:14:02,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 07:14:02,628 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 07:14:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:02,692 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2025-01-09 07:14:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 07:14:02,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2025-01-09 07:14:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:02,693 INFO L225 Difference]: With dead ends: 104 [2025-01-09 07:14:02,694 INFO L226 Difference]: Without dead ends: 66 [2025-01-09 07:14:02,694 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-09 07:14:02,694 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:02,695 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 74 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 07:14:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-01-09 07:14:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2025-01-09 07:14:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 54 states have internal predecessors, (64), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 07:14:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2025-01-09 07:14:02,705 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 31 [2025-01-09 07:14:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:02,705 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2025-01-09 07:14:02,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 07:14:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2025-01-09 07:14:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-09 07:14:02,706 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:02,706 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:02,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 07:14:02,706 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:02,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1271892803, now seen corresponding path program 1 times [2025-01-09 07:14:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:02,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172564445] [2025-01-09 07:14:02,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:02,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 07:14:02,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 07:14:02,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:02,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 07:14:03,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:03,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172564445] [2025-01-09 07:14:03,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172564445] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 07:14:03,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296478719] [2025-01-09 07:14:03,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:03,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:03,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 07:14:03,107 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) [2025-01-09 07:14:03,109 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 [2025-01-09 07:14:03,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 07:14:03,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 07:14:03,179 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:03,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:03,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-09 07:14:03,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 07:14:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 07:14:03,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 07:14:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 07:14:04,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296478719] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 07:14:04,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 07:14:04,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 16] total 33 [2025-01-09 07:14:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684952951] [2025-01-09 07:14:04,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 07:14:04,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-09 07:14:04,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:04,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-09 07:14:04,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 07:14:04,010 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 33 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 32 states have internal predecessors, (64), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 07:14:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:04,555 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2025-01-09 07:14:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 07:14:04,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 32 states have internal predecessors, (64), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2025-01-09 07:14:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:04,556 INFO L225 Difference]: With dead ends: 151 [2025-01-09 07:14:04,556 INFO L226 Difference]: Without dead ends: 113 [2025-01-09 07:14:04,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2025-01-09 07:14:04,558 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 342 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:04,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 333 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 07:14:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-01-09 07:14:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2025-01-09 07:14:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 80 states have internal predecessors, (92), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-09 07:14:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2025-01-09 07:14:04,568 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 32 [2025-01-09 07:14:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:04,568 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2025-01-09 07:14:04,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 32 states have internal predecessors, (64), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 07:14:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2025-01-09 07:14:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-09 07:14:04,571 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:04,571 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:04,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 07:14:04,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:04,776 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:04,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash -20424086, now seen corresponding path program 1 times [2025-01-09 07:14:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904102101] [2025-01-09 07:14:04,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:04,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-09 07:14:04,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 07:14:04,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:04,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 07:14:05,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:05,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904102101] [2025-01-09 07:14:05,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904102101] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 07:14:05,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838524008] [2025-01-09 07:14:05,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:05,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:05,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 07:14:05,063 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) [2025-01-09 07:14:05,065 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 [2025-01-09 07:14:05,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-09 07:14:05,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 07:14:05,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:05,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:05,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-01-09 07:14:05,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 07:14:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 07:14:05,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 07:14:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 07:14:05,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838524008] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 07:14:05,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 07:14:05,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 32 [2025-01-09 07:14:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929916149] [2025-01-09 07:14:05,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 07:14:05,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-09 07:14:05,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:05,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-09 07:14:05,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2025-01-09 07:14:05,924 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2025-01-09 07:14:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:06,606 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2025-01-09 07:14:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 07:14:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2025-01-09 07:14:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:06,608 INFO L225 Difference]: With dead ends: 160 [2025-01-09 07:14:06,608 INFO L226 Difference]: Without dead ends: 97 [2025-01-09 07:14:06,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=472, Invalid=2390, Unknown=0, NotChecked=0, Total=2862 [2025-01-09 07:14:06,609 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:06,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 365 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 07:14:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-01-09 07:14:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2025-01-09 07:14:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 73 states have internal predecessors, (83), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2025-01-09 07:14:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2025-01-09 07:14:06,620 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 44 [2025-01-09 07:14:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:06,621 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2025-01-09 07:14:06,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2025-01-09 07:14:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2025-01-09 07:14:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-01-09 07:14:06,623 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:06,623 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:06,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 07:14:06,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:06,824 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:06,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:06,824 INFO L85 PathProgramCache]: Analyzing trace with hash 663257276, now seen corresponding path program 1 times [2025-01-09 07:14:06,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:06,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719461777] [2025-01-09 07:14:06,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:06,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:06,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-01-09 07:14:06,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-01-09 07:14:06,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:06,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-09 07:14:07,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719461777] [2025-01-09 07:14:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719461777] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 07:14:07,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400290489] [2025-01-09 07:14:07,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 07:14:07,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 07:14:07,508 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) [2025-01-09 07:14:07,510 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 [2025-01-09 07:14:07,557 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-01-09 07:14:07,604 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-01-09 07:14:07,605 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 07:14:07,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:07,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 121 conjuncts are in the unsatisfiable core [2025-01-09 07:14:07,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 07:14:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-01-09 07:14:08,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 07:14:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-01-09 07:14:17,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400290489] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 07:14:17,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 07:14:17,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 25] total 52 [2025-01-09 07:14:17,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525381909] [2025-01-09 07:14:17,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 07:14:17,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-01-09 07:14:17,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:17,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-01-09 07:14:17,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2025-01-09 07:14:17,424 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 51 states have internal predecessors, (122), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 13 states have call predecessors, (18), 16 states have call successors, (18) [2025-01-09 07:14:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:18,850 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2025-01-09 07:14:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-09 07:14:18,850 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 51 states have internal predecessors, (122), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 13 states have call predecessors, (18), 16 states have call successors, (18) Word has length 73 [2025-01-09 07:14:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:18,852 INFO L225 Difference]: With dead ends: 197 [2025-01-09 07:14:18,852 INFO L226 Difference]: Without dead ends: 140 [2025-01-09 07:14:18,853 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=962, Invalid=4440, Unknown=0, NotChecked=0, Total=5402 [2025-01-09 07:14:18,853 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 225 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:18,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 281 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 07:14:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-01-09 07:14:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2025-01-09 07:14:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2025-01-09 07:14:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 166 transitions. [2025-01-09 07:14:18,864 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 166 transitions. Word has length 73 [2025-01-09 07:14:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:18,864 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 166 transitions. [2025-01-09 07:14:18,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 51 states have internal predecessors, (122), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 13 states have call predecessors, (18), 16 states have call successors, (18) [2025-01-09 07:14:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 166 transitions. [2025-01-09 07:14:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-01-09 07:14:18,865 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:18,865 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:18,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 07:14:19,065 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,SelfDestructingSolverStorable8 [2025-01-09 07:14:19,066 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:19,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1972719459, now seen corresponding path program 2 times [2025-01-09 07:14:19,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:19,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015389825] [2025-01-09 07:14:19,068 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 07:14:19,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:19,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-01-09 07:14:19,119 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-01-09 07:14:19,119 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 07:14:19,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-09 07:14:19,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 07:14:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015389825] [2025-01-09 07:14:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015389825] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 07:14:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363981812] [2025-01-09 07:14:19,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 07:14:19,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:19,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 07:14:19,864 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) [2025-01-09 07:14:19,865 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 [2025-01-09 07:14:19,915 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-01-09 07:14:19,970 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-01-09 07:14:19,970 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 07:14:19,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:19,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 110 conjuncts are in the unsatisfiable core [2025-01-09 07:14:19,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 07:14:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 19 proven. 62 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-09 07:14:21,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 07:14:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 19 proven. 62 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-09 07:14:31,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363981812] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 07:14:31,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 07:14:31,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 28] total 61 [2025-01-09 07:14:31,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392410320] [2025-01-09 07:14:31,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 07:14:31,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-01-09 07:14:31,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 07:14:31,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-01-09 07:14:31,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=3113, Unknown=0, NotChecked=0, Total=3660 [2025-01-09 07:14:31,732 INFO L87 Difference]: Start difference. First operand 135 states and 166 transitions. Second operand has 61 states, 54 states have (on average 2.425925925925926) internal successors, (131), 59 states have internal predecessors, (131), 17 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 12 states have call predecessors, (18), 14 states have call successors, (18) [2025-01-09 07:14:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 07:14:34,930 INFO L93 Difference]: Finished difference Result 165 states and 203 transitions. [2025-01-09 07:14:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-01-09 07:14:34,930 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 54 states have (on average 2.425925925925926) internal successors, (131), 59 states have internal predecessors, (131), 17 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 12 states have call predecessors, (18), 14 states have call successors, (18) Word has length 74 [2025-01-09 07:14:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 07:14:34,932 INFO L225 Difference]: With dead ends: 165 [2025-01-09 07:14:34,932 INFO L226 Difference]: Without dead ends: 163 [2025-01-09 07:14:34,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1651, Invalid=6539, Unknown=0, NotChecked=0, Total=8190 [2025-01-09 07:14:34,934 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 445 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 07:14:34,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 367 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 07:14:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2025-01-09 07:14:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 142. [2025-01-09 07:14:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 123 states have internal predecessors, (139), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2025-01-09 07:14:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 173 transitions. [2025-01-09 07:14:34,948 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 173 transitions. Word has length 74 [2025-01-09 07:14:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 07:14:34,948 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 173 transitions. [2025-01-09 07:14:34,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 54 states have (on average 2.425925925925926) internal successors, (131), 59 states have internal predecessors, (131), 17 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 12 states have call predecessors, (18), 14 states have call successors, (18) [2025-01-09 07:14:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 173 transitions. [2025-01-09 07:14:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-01-09 07:14:34,949 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 07:14:34,949 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 07:14:34,955 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 [2025-01-09 07:14:35,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-01-09 07:14:35,149 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 07:14:35,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 07:14:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash -899092854, now seen corresponding path program 2 times [2025-01-09 07:14:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 07:14:35,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048303070] [2025-01-09 07:14:35,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 07:14:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 07:14:35,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-01-09 07:14:35,217 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-01-09 07:14:35,217 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 07:14:35,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 07:14:35,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225670937] [2025-01-09 07:14:35,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 07:14:35,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 07:14:35,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 07:14:35,221 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) [2025-01-09 07:14:35,223 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 [2025-01-09 07:14:35,278 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-01-09 07:14:35,557 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-01-09 07:14:35,558 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 07:14:35,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 07:14:35,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 106 conjuncts are in the unsatisfiable core [2025-01-09 07:14:35,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 07:14:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 38 proven. 57 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-09 07:14:37,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 07:14:58,330 WARN L286 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-01-09 07:15:02,514 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse8 (mod |c_ULTIMATE.start_main_~var_16~0#1| 256))) (let ((.cse1 (+ .cse8 1)) (.cse0 (mod |c_ULTIMATE.start_main_~mask_SORT_1~0#1| 256))) (or (not (= (mod (+ (* 255 |c_ULTIMATE.start_main_~mask_SORT_12~0#1|) 1) 256) 0)) (< .cse0 .cse1) (let ((.cse3 (mod |c_ULTIMATE.start_main_~var_7~0#1| 256)) (.cse5 (mod |c_ULTIMATE.start_main_~mask_SORT_12~0#1| 256)) (.cse6 (mod (* (mod |c_ULTIMATE.start_main_~state_3~0#1| 256) (mod |c_ULTIMATE.start_main_~state_4~0#1| 256)) 256)) (.cse7 (mod |c_ULTIMATE.start_main_~var_2~0#1| 256))) (and (forall ((v_y_92 Int) (v_z_94 Int) (v_y_94 Int)) (let ((.cse9 (* v_y_94 256))) (let ((.cse2 (+ .cse9 v_z_94)) (.cse4 (+ .cse9 (* v_y_92 256) v_z_94))) (or (< 255 .cse2) (< .cse3 .cse4) (< .cse2 0) (not (= .cse5 (mod (* .cse6 v_z_94) 256))) (< 255 v_z_94) (< .cse0 .cse4) (< (+ v_z_94 .cse7) (+ 257 .cse8)) (< .cse4 0))))) (forall ((v_y_92 Int) (v_z_94 Int) (v_y_94 Int)) (let ((.cse13 (* v_y_94 256))) (let ((.cse11 (+ .cse13 v_z_94)) (.cse10 (+ v_z_94 .cse7)) (.cse12 (+ .cse13 (* v_y_92 256) v_z_94))) (or (< 255 .cse10) (< 255 .cse11) (< .cse3 .cse12) (< v_z_94 0) (< .cse11 0) (< .cse10 .cse1) (not (= .cse5 (mod (* .cse6 v_z_94) 256))) (< .cse0 .cse12) (< .cse12 0)))))))))) is different from true [2025-01-09 07:15:15,611 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)