./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/nla-digbench-scaling/cohencu-ll_valuebound100.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ecd26f30dcf2e00e51585057257a3ebe53fdc2d12652276addf710ad43d7dfd --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 03:10:43,778 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:10:43,813 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:10:43,816 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:10:43,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:10:43,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:10:43,831 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:10:43,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:10:43,831 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:10:43,831 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:10:43,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:10:43,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:10:43,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:10:43,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:10:43,832 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:10:43,833 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:10:43,833 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:10:43,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:10:43,834 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:10:43,834 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ecd26f30dcf2e00e51585057257a3ebe53fdc2d12652276addf710ad43d7dfd [2025-01-09 03:10:44,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:10:44,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:10:44,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:10:44,014 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:10:44,014 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:10:44,015 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2025-01-09 03:10:45,177 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a694ce26d/8ff87e5310a44e8f9c7257cc4592536c/FLAG0f8939259 [2025-01-09 03:10:45,393 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:10:45,394 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2025-01-09 03:10:45,414 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a694ce26d/8ff87e5310a44e8f9c7257cc4592536c/FLAG0f8939259 [2025-01-09 03:10:45,428 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a694ce26d/8ff87e5310a44e8f9c7257cc4592536c [2025-01-09 03:10:45,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:10:45,432 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:10:45,434 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:10:45,434 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:10:45,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:10:45,439 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@503c086b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45, skipping insertion in model container [2025-01-09 03:10:45,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,455 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:10:45,551 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2025-01-09 03:10:45,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:10:45,576 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:10:45,584 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2025-01-09 03:10:45,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:10:45,603 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:10:45,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45 WrapperNode [2025-01-09 03:10:45,605 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:10:45,605 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:10:45,605 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:10:45,605 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:10:45,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,628 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2025-01-09 03:10:45,628 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:10:45,628 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:10:45,628 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:10:45,628 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:10:45,635 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,636 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,644 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 03:10:45,647 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,650 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,650 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,652 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,655 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:10:45,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:10:45,656 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:10:45,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:10:45,657 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (1/1) ... [2025-01-09 03:10:45,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:10:45,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:45,680 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 03:10:45,686 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 03:10:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:10:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:10:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:10:45,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:10:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 03:10:45,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 03:10:45,734 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:10:45,735 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:10:45,809 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-01-09 03:10:45,809 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:10:45,814 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:10:45,814 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 03:10:45,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:10:45 BoogieIcfgContainer [2025-01-09 03:10:45,815 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:10:45,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:10:45,816 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:10:45,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:10:45,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:10:45" (1/3) ... [2025-01-09 03:10:45,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8a34bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:10:45, skipping insertion in model container [2025-01-09 03:10:45,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:10:45" (2/3) ... [2025-01-09 03:10:45,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8a34bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:10:45, skipping insertion in model container [2025-01-09 03:10:45,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:10:45" (3/3) ... [2025-01-09 03:10:45,820 INFO L128 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound100.c [2025-01-09 03:10:45,829 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:10:45,829 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cohencu-ll_valuebound100.c that has 2 procedures, 26 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-01-09 03:10:45,856 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:10:45,863 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;@26038504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:10:45,863 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:10:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-01-09 03:10:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-09 03:10:45,868 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:45,868 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:45,869 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:45,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash 120446366, now seen corresponding path program 1 times [2025-01-09 03:10:45,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:45,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581189705] [2025-01-09 03:10:45,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:45,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:45,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 03:10:45,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 03:10:45,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:45,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:45,955 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 03:10:45,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:45,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581189705] [2025-01-09 03:10:45,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581189705] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:10:45,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:10:45,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 03:10:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628354823] [2025-01-09 03:10:45,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:10:45,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 03:10:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:45,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 03:10:45,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:10:45,973 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:10:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:45,988 INFO L93 Difference]: Finished difference Result 49 states and 85 transitions. [2025-01-09 03:10:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 03:10:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-01-09 03:10:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:45,993 INFO L225 Difference]: With dead ends: 49 [2025-01-09 03:10:45,993 INFO L226 Difference]: Without dead ends: 22 [2025-01-09 03:10:45,997 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:10:46,000 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:46,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:10:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-01-09 03:10:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-01-09 03:10:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-09 03:10:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2025-01-09 03:10:46,026 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2025-01-09 03:10:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:46,026 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2025-01-09 03:10:46,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:10:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2025-01-09 03:10:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-09 03:10:46,027 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:46,027 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:46,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 03:10:46,027 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:46,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash 177704668, now seen corresponding path program 1 times [2025-01-09 03:10:46,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:46,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146495797] [2025-01-09 03:10:46,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:46,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 03:10:46,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 03:10:46,048 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:46,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:46,203 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 03:10:46,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:46,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146495797] [2025-01-09 03:10:46,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146495797] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:10:46,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:10:46,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:10:46,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828436140] [2025-01-09 03:10:46,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:10:46,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:10:46,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:46,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:10:46,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:10:46,206 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:10:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:46,270 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2025-01-09 03:10:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:10:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-01-09 03:10:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:46,271 INFO L225 Difference]: With dead ends: 28 [2025-01-09 03:10:46,275 INFO L226 Difference]: Without dead ends: 26 [2025-01-09 03:10:46,276 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:10:46,276 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:46,277 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:10:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-01-09 03:10:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-01-09 03:10:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-09 03:10:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2025-01-09 03:10:46,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2025-01-09 03:10:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:46,290 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2025-01-09 03:10:46,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:10:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2025-01-09 03:10:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-09 03:10:46,290 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:46,290 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:46,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 03:10:46,291 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:46,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash -685901719, now seen corresponding path program 1 times [2025-01-09 03:10:46,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:46,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696684882] [2025-01-09 03:10:46,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:46,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:46,302 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 03:10:46,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 03:10:46,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:46,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:10:46,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099854802] [2025-01-09 03:10:46,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:46,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:46,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:46,321 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 03:10:46,322 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 03:10:46,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 03:10:46,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 03:10:46,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:46,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:46,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:10:46,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:10:46,440 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 03:10:46,440 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:10:46,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696684882] [2025-01-09 03:10:46,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:10:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099854802] [2025-01-09 03:10:46,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099854802] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:10:46,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:10:46,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:10:46,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174416871] [2025-01-09 03:10:46,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:10:46,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:10:46,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:46,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:10:46,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:10:46,442 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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 03:10:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:46,506 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2025-01-09 03:10:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:10:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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 13 [2025-01-09 03:10:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:46,507 INFO L225 Difference]: With dead ends: 44 [2025-01-09 03:10:46,507 INFO L226 Difference]: Without dead ends: 42 [2025-01-09 03:10:46,508 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:10:46,509 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:46,510 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:10:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-01-09 03:10:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2025-01-09 03:10:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-01-09 03:10:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2025-01-09 03:10:46,542 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 13 [2025-01-09 03:10:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:46,542 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2025-01-09 03:10:46,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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 03:10:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2025-01-09 03:10:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-09 03:10:46,542 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:46,542 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:46,552 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 03:10:46,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:46,743 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:46,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 199857852, now seen corresponding path program 1 times [2025-01-09 03:10:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522887824] [2025-01-09 03:10:46,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:46,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 03:10:46,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:10:46,770 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:46,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:10:46,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33302837] [2025-01-09 03:10:46,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:46,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:46,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:46,775 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 03:10:46,776 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 03:10:46,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 03:10:46,813 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:10:46,813 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:46,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:46,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:10:46,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:10:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:10:46,854 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:10:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522887824] [2025-01-09 03:10:46,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:10:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33302837] [2025-01-09 03:10:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33302837] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:10:46,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:10:46,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:10:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027383966] [2025-01-09 03:10:46,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:10:46,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:10:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:46,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:10:46,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:10:46,857 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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 03:10:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:46,917 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2025-01-09 03:10:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:10:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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 18 [2025-01-09 03:10:46,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:46,920 INFO L225 Difference]: With dead ends: 48 [2025-01-09 03:10:46,920 INFO L226 Difference]: Without dead ends: 46 [2025-01-09 03:10:46,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:10:46,921 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:46,922 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:10:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-01-09 03:10:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2025-01-09 03:10:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-01-09 03:10:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2025-01-09 03:10:46,938 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 18 [2025-01-09 03:10:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:46,938 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2025-01-09 03:10:46,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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 03:10:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2025-01-09 03:10:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-01-09 03:10:46,939 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:46,939 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:46,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 03:10:47,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:47,140 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:47,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1232079881, now seen corresponding path program 1 times [2025-01-09 03:10:47,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:47,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954503360] [2025-01-09 03:10:47,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:47,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:47,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 03:10:47,153 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 03:10:47,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:47,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:10:47,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195519562] [2025-01-09 03:10:47,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:47,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:47,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:47,156 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 03:10:47,160 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 03:10:47,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 03:10:47,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 03:10:47,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:47,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:47,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:10:47,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:10:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 03:10:47,244 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:10:47,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:47,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954503360] [2025-01-09 03:10:47,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:10:47,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195519562] [2025-01-09 03:10:47,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195519562] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:10:47,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:10:47,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:10:47,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598037512] [2025-01-09 03:10:47,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:10:47,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:10:47,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:47,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:10:47,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:10:47,246 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-01-09 03:10:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:47,310 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2025-01-09 03:10:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:10:47,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2025-01-09 03:10:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:47,311 INFO L225 Difference]: With dead ends: 56 [2025-01-09 03:10:47,311 INFO L226 Difference]: Without dead ends: 44 [2025-01-09 03:10:47,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:10:47,312 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:47,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:10:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-01-09 03:10:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-01-09 03:10:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 03:10:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2025-01-09 03:10:47,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 23 [2025-01-09 03:10:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:47,327 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2025-01-09 03:10:47,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-01-09 03:10:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2025-01-09 03:10:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 03:10:47,327 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:47,327 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:47,333 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 03:10:47,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:47,528 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:47,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1944274132, now seen corresponding path program 1 times [2025-01-09 03:10:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:47,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704900364] [2025-01-09 03:10:47,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:47,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:47,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 03:10:47,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:10:47,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:47,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:10:47,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018448519] [2025-01-09 03:10:47,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:47,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:47,548 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 03:10:47,549 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 03:10:47,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 03:10:47,583 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:10:47,583 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:47,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:47,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-09 03:10:47,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:10:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-09 03:10:47,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:10:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-09 03:10:47,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704900364] [2025-01-09 03:10:47,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:10:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018448519] [2025-01-09 03:10:47,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018448519] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:10:47,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:10:47,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-01-09 03:10:47,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235023005] [2025-01-09 03:10:47,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:10:47,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 03:10:47,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:47,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 03:10:47,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-01-09 03:10:47,830 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-01-09 03:10:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:48,049 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2025-01-09 03:10:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 03:10:48,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 39 [2025-01-09 03:10:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:48,051 INFO L225 Difference]: With dead ends: 66 [2025-01-09 03:10:48,051 INFO L226 Difference]: Without dead ends: 64 [2025-01-09 03:10:48,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-01-09 03:10:48,051 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:48,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:10:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-01-09 03:10:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2025-01-09 03:10:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 03:10:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2025-01-09 03:10:48,064 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 39 [2025-01-09 03:10:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:48,064 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2025-01-09 03:10:48,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-01-09 03:10:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2025-01-09 03:10:48,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-09 03:10:48,065 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:48,065 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:48,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 03:10:48,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-01-09 03:10:48,266 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:48,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash 153769265, now seen corresponding path program 2 times [2025-01-09 03:10:48,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:48,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912485953] [2025-01-09 03:10:48,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:10:48,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:48,273 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-01-09 03:10:48,292 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 03:10:48,292 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:10:48,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:10:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21139844] [2025-01-09 03:10:48,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:10:48,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:48,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:48,296 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 03:10:48,298 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 03:10:48,320 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-01-09 03:10:48,333 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 03:10:48,333 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:10:48,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:48,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-01-09 03:10:48,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:10:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-09 03:10:48,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:10:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-09 03:10:48,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:48,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912485953] [2025-01-09 03:10:48,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:10:48,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21139844] [2025-01-09 03:10:48,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21139844] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:10:48,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:10:48,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2025-01-09 03:10:48,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484123801] [2025-01-09 03:10:48,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:10:48,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 03:10:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:48,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 03:10:48,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:10:48,656 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2025-01-09 03:10:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:48,887 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2025-01-09 03:10:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 03:10:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 44 [2025-01-09 03:10:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:48,889 INFO L225 Difference]: With dead ends: 79 [2025-01-09 03:10:48,889 INFO L226 Difference]: Without dead ends: 74 [2025-01-09 03:10:48,890 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-01-09 03:10:48,890 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:48,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:10:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-01-09 03:10:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2025-01-09 03:10:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-01-09 03:10:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2025-01-09 03:10:48,914 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 44 [2025-01-09 03:10:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:48,915 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2025-01-09 03:10:48,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2025-01-09 03:10:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2025-01-09 03:10:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-01-09 03:10:48,917 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:48,917 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:48,928 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 03:10:49,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:49,118 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:49,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:49,122 INFO L85 PathProgramCache]: Analyzing trace with hash -588350453, now seen corresponding path program 1 times [2025-01-09 03:10:49,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:49,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347766721] [2025-01-09 03:10:49,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:49,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-01-09 03:10:49,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-01-09 03:10:49,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:49,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:10:49,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278694457] [2025-01-09 03:10:49,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:49,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:49,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:49,190 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 03:10:49,191 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 03:10:49,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-01-09 03:10:49,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-01-09 03:10:49,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:49,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:49,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 03:10:49,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:10:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-01-09 03:10:49,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:10:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-01-09 03:10:49,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347766721] [2025-01-09 03:10:49,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:10:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278694457] [2025-01-09 03:10:49,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278694457] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:10:49,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:10:49,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-01-09 03:10:49,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938590347] [2025-01-09 03:10:49,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:10:49,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:10:49,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:49,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:10:49,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:10:49,539 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2025-01-09 03:10:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:49,751 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2025-01-09 03:10:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 03:10:49,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 65 [2025-01-09 03:10:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:49,752 INFO L225 Difference]: With dead ends: 99 [2025-01-09 03:10:49,752 INFO L226 Difference]: Without dead ends: 97 [2025-01-09 03:10:49,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:10:49,753 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:49,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 192 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:10:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-01-09 03:10:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2025-01-09 03:10:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 51 states have internal predecessors, (52), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2025-01-09 03:10:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2025-01-09 03:10:49,772 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 65 [2025-01-09 03:10:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:49,773 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2025-01-09 03:10:49,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2025-01-09 03:10:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2025-01-09 03:10:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-01-09 03:10:49,773 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:49,773 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:49,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 03:10:49,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-09 03:10:49,978 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:49,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:49,979 INFO L85 PathProgramCache]: Analyzing trace with hash -940212454, now seen corresponding path program 1 times [2025-01-09 03:10:49,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:49,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836086830] [2025-01-09 03:10:49,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:49,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:49,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-01-09 03:10:49,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-01-09 03:10:49,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:49,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:10:49,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567610762] [2025-01-09 03:10:49,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:10:49,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:49,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:10:49,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 03:10:50,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-01-09 03:10:50,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-01-09 03:10:50,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:10:50,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:50,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-09 03:10:50,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:10:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-01-09 03:10:50,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:10:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-01-09 03:10:50,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:10:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836086830] [2025-01-09 03:10:50,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:10:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567610762] [2025-01-09 03:10:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567610762] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:10:50,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:10:50,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-01-09 03:10:50,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256365050] [2025-01-09 03:10:50,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:10:50,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:10:50,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:10:50,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:10:50,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:10:50,393 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2025-01-09 03:10:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:10:50,692 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2025-01-09 03:10:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 03:10:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 70 [2025-01-09 03:10:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:10:50,696 INFO L225 Difference]: With dead ends: 119 [2025-01-09 03:10:50,696 INFO L226 Difference]: Without dead ends: 110 [2025-01-09 03:10:50,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-01-09 03:10:50,697 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:10:50,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:10:50,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-01-09 03:10:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2025-01-09 03:10:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 55 states have internal predecessors, (56), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2025-01-09 03:10:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2025-01-09 03:10:50,729 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 70 [2025-01-09 03:10:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:10:50,729 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2025-01-09 03:10:50,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2025-01-09 03:10:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2025-01-09 03:10:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-01-09 03:10:50,730 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:10:50,730 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-01-09 03:10:50,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 03:10:50,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:50,931 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:10:50,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:10:50,932 INFO L85 PathProgramCache]: Analyzing trace with hash -53362273, now seen corresponding path program 3 times [2025-01-09 03:10:50,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:10:50,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528081932] [2025-01-09 03:10:50,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:10:50,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:10:50,938 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 11 equivalence classes. [2025-01-09 03:10:50,970 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 75 of 75 statements. [2025-01-09 03:10:50,972 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-01-09 03:10:50,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:10:50,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323827581] [2025-01-09 03:10:50,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:10:50,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:10:50,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:10:50,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:10:50,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 03:10:51,007 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 11 equivalence classes. [2025-01-09 03:10:51,030 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 29 of 75 statements. [2025-01-09 03:10:51,030 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 03:10:51,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:10:51,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 03:10:51,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:10:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 116 proven. 9 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2025-01-09 03:10:59,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:11:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 116 proven. 9 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2025-01-09 03:11:13,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:11:13,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528081932] [2025-01-09 03:11:13,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:11:13,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323827581] [2025-01-09 03:11:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323827581] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:11:13,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:11:13,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2025-01-09 03:11:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82762784] [2025-01-09 03:11:13,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:11:13,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 03:11:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:11:13,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 03:11:13,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=166, Unknown=3, NotChecked=0, Total=210 [2025-01-09 03:11:13,999 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2025-01-09 03:11:16,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:20,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:24,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:28,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:32,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:35,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:40,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:44,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:47,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:49,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:51,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:11:55,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:12:00,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:12:05,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:12:07,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:12:10,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:12:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:12:10,676 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2025-01-09 03:12:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 03:12:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 75 [2025-01-09 03:12:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:12:10,677 INFO L225 Difference]: With dead ends: 111 [2025-01-09 03:12:10,677 INFO L226 Difference]: Without dead ends: 93 [2025-01-09 03:12:10,677 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=65, Invalid=238, Unknown=3, NotChecked=0, Total=306 [2025-01-09 03:12:10,678 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 63 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.6s IncrementalHoareTripleChecker+Time [2025-01-09 03:12:10,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 128 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 125 Invalid, 8 Unknown, 0 Unchecked, 56.6s Time] [2025-01-09 03:12:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-01-09 03:12:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-01-09 03:12:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2025-01-09 03:12:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2025-01-09 03:12:10,697 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 75 [2025-01-09 03:12:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:12:10,699 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2025-01-09 03:12:10,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2025-01-09 03:12:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2025-01-09 03:12:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-01-09 03:12:10,703 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:12:10,703 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:12:10,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 03:12:10,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:12:10,904 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:12:10,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:12:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1588909601, now seen corresponding path program 2 times [2025-01-09 03:12:10,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:12:10,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026474611] [2025-01-09 03:12:10,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:12:10,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:12:10,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-01-09 03:12:10,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-01-09 03:12:10,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:12:10,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:12:10,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578986806] [2025-01-09 03:12:10,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:12:10,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:12:10,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:12:10,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:12:10,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 03:12:10,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-01-09 03:12:10,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-01-09 03:12:10,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:12:10,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:12:10,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-01-09 03:12:11,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:12:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 86 proven. 52 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2025-01-09 03:12:11,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:12:11,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:12:11,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026474611] [2025-01-09 03:12:11,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:12:11,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578986806] [2025-01-09 03:12:11,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578986806] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:12:11,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:12:11,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-01-09 03:12:11,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886483648] [2025-01-09 03:12:11,181 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:12:11,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:12:11,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:12:11,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:12:11,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:12:11,182 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2025-01-09 03:12:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:12:11,369 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2025-01-09 03:12:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 03:12:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 117 [2025-01-09 03:12:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:12:11,370 INFO L225 Difference]: With dead ends: 103 [2025-01-09 03:12:11,370 INFO L226 Difference]: Without dead ends: 95 [2025-01-09 03:12:11,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:12:11,371 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:12:11,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 205 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:12:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-01-09 03:12:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2025-01-09 03:12:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2025-01-09 03:12:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2025-01-09 03:12:11,409 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 117 [2025-01-09 03:12:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:12:11,409 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2025-01-09 03:12:11,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2025-01-09 03:12:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2025-01-09 03:12:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2025-01-09 03:12:11,410 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:12:11,410 INFO L218 NwaCegarLoop]: trace histogram [27, 26, 26, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:12:11,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 03:12:11,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:12:11,611 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:12:11,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:12:11,611 INFO L85 PathProgramCache]: Analyzing trace with hash 680477580, now seen corresponding path program 3 times [2025-01-09 03:12:11,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:12:11,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729468049] [2025-01-09 03:12:11,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:12:11,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:12:11,616 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 143 statements into 21 equivalence classes. [2025-01-09 03:12:11,670 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 143 of 143 statements. [2025-01-09 03:12:11,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-01-09 03:12:11,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:12:11,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899764855] [2025-01-09 03:12:11,671 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:12:11,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:12:11,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:12:11,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:12:11,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 03:12:11,701 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 143 statements into 21 equivalence classes. [2025-01-09 03:12:11,710 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 143 statements. [2025-01-09 03:12:11,710 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 03:12:11,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:12:11,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 03:12:11,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:12:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 135 proven. 16 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2025-01-09 03:12:11,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:12:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 135 proven. 16 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2025-01-09 03:12:11,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:12:11,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729468049] [2025-01-09 03:12:11,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:12:11,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899764855] [2025-01-09 03:12:11,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899764855] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:12:11,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:12:11,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2025-01-09 03:12:11,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487137770] [2025-01-09 03:12:11,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:12:11,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:12:11,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:12:11,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:12:11,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:12:11,892 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-01-09 03:12:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:12:12,005 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2025-01-09 03:12:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 03:12:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 143 [2025-01-09 03:12:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:12:12,006 INFO L225 Difference]: With dead ends: 101 [2025-01-09 03:12:12,006 INFO L226 Difference]: Without dead ends: 97 [2025-01-09 03:12:12,007 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:12:12,007 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:12:12,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:12:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-01-09 03:12:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2025-01-09 03:12:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2025-01-09 03:12:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2025-01-09 03:12:12,023 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 143 [2025-01-09 03:12:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:12:12,023 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2025-01-09 03:12:12,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-01-09 03:12:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2025-01-09 03:12:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-01-09 03:12:12,025 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:12:12,025 INFO L218 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:12:12,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 03:12:12,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-09 03:12:12,229 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:12:12,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:12:12,230 INFO L85 PathProgramCache]: Analyzing trace with hash 819609657, now seen corresponding path program 2 times [2025-01-09 03:12:12,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:12:12,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518631279] [2025-01-09 03:12:12,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:12:12,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:12:12,235 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 148 statements into 2 equivalence classes. [2025-01-09 03:12:12,257 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 148 of 148 statements. [2025-01-09 03:12:12,257 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:12:12,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:12:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650139443] [2025-01-09 03:12:12,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:12:12,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:12:12,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:12:12,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:12:12,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 03:12:12,293 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 148 statements into 2 equivalence classes. [2025-01-09 03:12:12,324 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 148 of 148 statements. [2025-01-09 03:12:12,325 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:12:12,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:12:12,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-01-09 03:12:12,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:12:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 113 proven. 79 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2025-01-09 03:12:12,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:12:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 113 proven. 43 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2025-01-09 03:12:12,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:12:12,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518631279] [2025-01-09 03:12:12,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:12:12,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650139443] [2025-01-09 03:12:12,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650139443] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:12:12,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:12:12,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2025-01-09 03:12:12,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212830212] [2025-01-09 03:12:12,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:12:12,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 03:12:12,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:12:12,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 03:12:12,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-01-09 03:12:12,851 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) [2025-01-09 03:12:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:12:13,228 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2025-01-09 03:12:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 03:12:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) Word has length 148 [2025-01-09 03:12:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:12:13,229 INFO L225 Difference]: With dead ends: 119 [2025-01-09 03:12:13,229 INFO L226 Difference]: Without dead ends: 0 [2025-01-09 03:12:13,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2025-01-09 03:12:13,231 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:12:13,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 202 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:12:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-01-09 03:12:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-01-09 03:12:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:12:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-01-09 03:12:13,231 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 148 [2025-01-09 03:12:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:12:13,232 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-01-09 03:12:13,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) [2025-01-09 03:12:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-01-09 03:12:13,232 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-01-09 03:12:13,237 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-01-09 03:12:13,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 03:12:13,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-09 03:12:13,440 INFO L422 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1] [2025-01-09 03:12:13,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-01-09 03:12:19,058 WARN L286 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 101 DAG size of output: 38 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2025-01-09 03:12:31,115 WARN L286 SmtUtils]: Spent 11.95s on a formula simplification. DAG size of input: 109 DAG size of output: 37 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter)