./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.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 e51b21c2da790a7136d7ad701fd2bec1367e3ae6dd3a60c613fa7cfa4db22905 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:28:26,462 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:28:26,510 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:28:26,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:28:26,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:28:26,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:28:26,533 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:28:26,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:28:26,533 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:28:26,533 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:28:26,533 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:28:26,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:28:26,533 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:28:26,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:28:26,533 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:28:26,533 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:28:26,533 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:28:26,538 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:28:26,538 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:28:26,538 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:28:26,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:28:26,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:28:26,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:28:26,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:28:26,540 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:28:26,540 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:28:26,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:28:26,541 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:28:26,541 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:28:26,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:28:26,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:28:26,541 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:28:26,541 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:28:26,541 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:28:26,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:28:26,542 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 -> e51b21c2da790a7136d7ad701fd2bec1367e3ae6dd3a60c613fa7cfa4db22905 [2025-02-05 15:28:26,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:28:26,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:28:26,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:28:26,869 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:28:26,870 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:28:26,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c [2025-02-05 15:28:28,084 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9d25f8e19/ad35a85229d343fabb43df00fb73d4a9/FLAG4bb73dcae [2025-02-05 15:28:28,344 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:28:28,345 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c [2025-02-05 15:28:28,358 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9d25f8e19/ad35a85229d343fabb43df00fb73d4a9/FLAG4bb73dcae [2025-02-05 15:28:28,664 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9d25f8e19/ad35a85229d343fabb43df00fb73d4a9 [2025-02-05 15:28:28,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:28:28,668 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:28:28,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:28:28,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:28:28,676 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:28:28,677 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,678 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1536527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28, skipping insertion in model container [2025-02-05 15:28:28,678 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,691 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:28:28,787 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/ps5-ll_unwindbound20.c[458,471] [2025-02-05 15:28:28,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:28:28,809 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:28:28,818 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/ps5-ll_unwindbound20.c[458,471] [2025-02-05 15:28:28,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:28:28,836 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:28:28,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28 WrapperNode [2025-02-05 15:28:28,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:28:28,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:28:28,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:28:28,838 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:28:28,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,854 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2025-02-05 15:28:28,856 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:28:28,856 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:28:28,856 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:28:28,857 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:28:28,862 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,867 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,873 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 15:28:28,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,878 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,880 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,881 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,882 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:28:28,882 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:28:28,884 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:28:28,884 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:28:28,884 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (1/1) ... [2025-02-05 15:28:28,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:28:28,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:28:28,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:28:28,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:28:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:28:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:28:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:28:28,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:28:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:28:28,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:28:28,974 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:28:28,975 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:28:29,073 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-05 15:28:29,073 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:28:29,084 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:28:29,085 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:28:29,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:28:29 BoogieIcfgContainer [2025-02-05 15:28:29,086 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:28:29,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:28:29,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:28:29,090 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:28:29,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:28:28" (1/3) ... [2025-02-05 15:28:29,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb1e4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:28:29, skipping insertion in model container [2025-02-05 15:28:29,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:28:28" (2/3) ... [2025-02-05 15:28:29,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb1e4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:28:29, skipping insertion in model container [2025-02-05 15:28:29,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:28:29" (3/3) ... [2025-02-05 15:28:29,092 INFO L128 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound20.c [2025-02-05 15:28:29,102 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:28:29,103 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG ps5-ll_unwindbound20.c that has 2 procedures, 20 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-05 15:28:29,156 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:28:29,171 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;@2da5e35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:28:29,174 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:28:29,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 15:28:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 15:28:29,184 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:28:29,184 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:28:29,184 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:28:29,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:28:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1374089334, now seen corresponding path program 1 times [2025-02-05 15:28:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:28:29,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176882132] [2025-02-05 15:28:29,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:29,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:28:29,241 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 15:28:29,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 15:28:29,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:29,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:28:29,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:28:29,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176882132] [2025-02-05 15:28:29,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176882132] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:28:29,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:28:29,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-05 15:28:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859053560] [2025-02-05 15:28:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:28:29,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:28:29,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:28:29,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:28:29,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:28:29,298 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:28:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:28:29,308 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2025-02-05 15:28:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:28:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 15:28:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:28:29,312 INFO L225 Difference]: With dead ends: 37 [2025-02-05 15:28:29,313 INFO L226 Difference]: Without dead ends: 16 [2025-02-05 15:28:29,315 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:28:29,316 INFO L435 NwaCegarLoop]: 23 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, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:28:29,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:28:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-05 15:28:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-02-05 15:28:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 15:28:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2025-02-05 15:28:29,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2025-02-05 15:28:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:28:29,336 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2025-02-05 15:28:29,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:28:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2025-02-05 15:28:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:28:29,336 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:28:29,336 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:28:29,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:28:29,337 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:28:29,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:28:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash 307831797, now seen corresponding path program 1 times [2025-02-05 15:28:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:28:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706645515] [2025-02-05 15:28:29,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:28:29,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:28:29,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:28:29,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:29,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:28:29,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506560483] [2025-02-05 15:28:29,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:29,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:29,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:28:29,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:28:29,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:28:29,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:28:29,402 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:28:29,403 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:29,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:29,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:28:29,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:28:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:28:29,504 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:28:29,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:28:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706645515] [2025-02-05 15:28:29,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:28:29,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506560483] [2025-02-05 15:28:29,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506560483] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:28:29,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:28:29,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:28:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108164293] [2025-02-05 15:28:29,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:28:29,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:28:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:28:29,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:28:29,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:28:29,508 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:28:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:28:29,569 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2025-02-05 15:28:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:28:29,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-02-05 15:28:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:28:29,570 INFO L225 Difference]: With dead ends: 28 [2025-02-05 15:28:29,570 INFO L226 Difference]: Without dead ends: 24 [2025-02-05 15:28:29,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:28:29,571 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:28:29,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 53 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:28:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-05 15:28:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-05 15:28:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 15:28:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-02-05 15:28:29,576 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2025-02-05 15:28:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:28:29,576 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-02-05 15:28:29,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:28:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-02-05 15:28:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-05 15:28:29,577 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:28:29,577 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:28:29,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:28:29,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:29,780 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:28:29,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:28:29,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2146101144, now seen corresponding path program 1 times [2025-02-05 15:28:29,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:28:29,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039684289] [2025-02-05 15:28:29,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:29,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:28:29,793 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-05 15:28:29,802 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 15:28:29,802 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:29,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:28:29,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024310551] [2025-02-05 15:28:29,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:29,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:29,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:28:29,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:28:29,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:28:29,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-05 15:28:29,841 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 15:28:29,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:29,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:29,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:28:29,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:28:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:28:29,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:28:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:28:29,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:28:29,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039684289] [2025-02-05 15:28:29,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:28:29,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024310551] [2025-02-05 15:28:29,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024310551] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 15:28:29,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:28:29,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-02-05 15:28:29,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748421031] [2025-02-05 15:28:29,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:28:29,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:28:29,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:28:29,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:28:29,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:28:29,986 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-02-05 15:28:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:28:30,016 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2025-02-05 15:28:30,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:28:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 18 [2025-02-05 15:28:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:28:30,018 INFO L225 Difference]: With dead ends: 30 [2025-02-05 15:28:30,018 INFO L226 Difference]: Without dead ends: 26 [2025-02-05 15:28:30,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:28:30,018 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:28:30,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:28:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-05 15:28:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-02-05 15:28:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 15:28:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2025-02-05 15:28:30,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2025-02-05 15:28:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:28:30,026 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2025-02-05 15:28:30,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-02-05 15:28:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2025-02-05 15:28:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 15:28:30,026 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:28:30,026 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:28:30,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 15:28:30,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:30,227 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:28:30,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:28:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 508371036, now seen corresponding path program 1 times [2025-02-05 15:28:30,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:28:30,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671455958] [2025-02-05 15:28:30,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:30,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:28:30,233 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:28:30,240 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:28:30,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:30,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:28:30,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:28:30,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671455958] [2025-02-05 15:28:30,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671455958] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:28:30,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583780286] [2025-02-05 15:28:30,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:30,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:30,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:28:30,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:28:30,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:28:30,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:28:30,426 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:28:30,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:30,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:30,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-05 15:28:30,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:28:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 15:28:30,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:28:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:28:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583780286] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:28:30,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:28:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2025-02-05 15:28:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865425913] [2025-02-05 15:28:30,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:28:30,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:28:30,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:28:30,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:28:30,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:28:30,490 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:28:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:28:30,557 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2025-02-05 15:28:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:28:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2025-02-05 15:28:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:28:30,558 INFO L225 Difference]: With dead ends: 66 [2025-02-05 15:28:30,558 INFO L226 Difference]: Without dead ends: 56 [2025-02-05 15:28:30,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:28:30,559 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:28:30,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 73 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:28:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-05 15:28:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2025-02-05 15:28:30,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 15:28:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2025-02-05 15:28:30,569 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 23 [2025-02-05 15:28:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:28:30,569 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2025-02-05 15:28:30,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:28:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2025-02-05 15:28:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 15:28:30,570 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:28:30,570 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:28:30,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 15:28:30,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:30,771 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:28:30,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:28:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash -674071302, now seen corresponding path program 1 times [2025-02-05 15:28:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:28:30,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281932487] [2025-02-05 15:28:30,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:28:30,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 15:28:30,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 15:28:30,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:30,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:28:30,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491336904] [2025-02-05 15:28:30,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:28:30,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:30,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:28:30,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:28:30,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:28:30,825 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 15:28:30,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 15:28:30,835 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:28:30,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:30,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 15:28:30,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:28:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:28:30,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:28:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:28:30,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:28:30,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281932487] [2025-02-05 15:28:30,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:28:30,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491336904] [2025-02-05 15:28:30,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491336904] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:28:30,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:28:30,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-02-05 15:28:30,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358606495] [2025-02-05 15:28:30,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:28:30,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:28:30,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:28:30,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:28:30,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:28:30,983 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:28:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:28:31,071 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2025-02-05 15:28:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:28:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2025-02-05 15:28:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:28:31,072 INFO L225 Difference]: With dead ends: 55 [2025-02-05 15:28:31,072 INFO L226 Difference]: Without dead ends: 46 [2025-02-05 15:28:31,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:28:31,073 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:28:31,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 139 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:28:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-05 15:28:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-02-05 15:28:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:28:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2025-02-05 15:28:31,082 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2025-02-05 15:28:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:28:31,082 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2025-02-05 15:28:31,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:28:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2025-02-05 15:28:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 15:28:31,083 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:28:31,083 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:28:31,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 15:28:31,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:31,287 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:28:31,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:28:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1925320429, now seen corresponding path program 2 times [2025-02-05 15:28:31,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:28:31,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812126663] [2025-02-05 15:28:31,288 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:28:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:28:31,296 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-02-05 15:28:31,305 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 15:28:31,305 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:28:31,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-05 15:28:31,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:28:31,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812126663] [2025-02-05 15:28:31,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812126663] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:28:31,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602556084] [2025-02-05 15:28:31,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:28:31,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:28:31,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:28:31,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:28:31,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-02-05 15:28:31,527 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 15:28:31,527 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:28:31,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:31,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:28:31,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:28:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 15:28:31,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:28:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-05 15:28:31,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602556084] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:28:31,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:28:31,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2025-02-05 15:28:31,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936804766] [2025-02-05 15:28:31,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:28:31,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:28:31,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:28:31,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:28:31,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:28:31,743 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2025-02-05 15:28:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:28:31,928 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2025-02-05 15:28:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:28:31,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 47 [2025-02-05 15:28:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:28:31,929 INFO L225 Difference]: With dead ends: 132 [2025-02-05 15:28:31,930 INFO L226 Difference]: Without dead ends: 122 [2025-02-05 15:28:31,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2025-02-05 15:28:31,932 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:28:31,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 128 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:28:31,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-02-05 15:28:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2025-02-05 15:28:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2025-02-05 15:28:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2025-02-05 15:28:31,954 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2025-02-05 15:28:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:28:31,954 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2025-02-05 15:28:31,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2025-02-05 15:28:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2025-02-05 15:28:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-05 15:28:31,955 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:28:31,955 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:28:31,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 15:28:32,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:32,156 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:28:32,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:28:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash 863742065, now seen corresponding path program 2 times [2025-02-05 15:28:32,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:28:32,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211460642] [2025-02-05 15:28:32,157 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:28:32,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:28:32,165 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-02-05 15:28:32,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 15:28:32,195 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:28:32,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:28:32,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732567638] [2025-02-05 15:28:32,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:28:32,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:32,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:28:32,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:28:32,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:28:32,244 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-02-05 15:28:32,260 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 15:28:32,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:28:32,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:32,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-05 15:28:32,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:28:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-05 15:28:32,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:28:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-05 15:28:32,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:28:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211460642] [2025-02-05 15:28:32,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:28:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732567638] [2025-02-05 15:28:32,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732567638] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:28:32,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:28:32,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2025-02-05 15:28:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378751048] [2025-02-05 15:28:32,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:28:32,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:28:32,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:28:32,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:28:32,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:28:32,694 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-05 15:28:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:28:33,031 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2025-02-05 15:28:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:28:33,031 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 53 [2025-02-05 15:28:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:28:33,032 INFO L225 Difference]: With dead ends: 103 [2025-02-05 15:28:33,032 INFO L226 Difference]: Without dead ends: 92 [2025-02-05 15:28:33,033 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2025-02-05 15:28:33,033 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:28:33,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 325 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:28:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-02-05 15:28:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2025-02-05 15:28:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 15:28:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2025-02-05 15:28:33,048 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 53 [2025-02-05 15:28:33,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:28:33,048 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2025-02-05 15:28:33,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-05 15:28:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2025-02-05 15:28:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-02-05 15:28:33,050 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:28:33,050 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:28:33,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 15:28:33,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 15:28:33,254 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:28:33,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:28:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1682248478, now seen corresponding path program 3 times [2025-02-05 15:28:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:28:33,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874815667] [2025-02-05 15:28:33,255 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:28:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:28:33,261 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 10 equivalence classes. [2025-02-05 15:28:33,365 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 93 of 93 statements. [2025-02-05 15:28:33,365 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-05 15:28:33,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:28:33,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3447366] [2025-02-05 15:28:33,371 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:28:33,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:28:33,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:28:33,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:28:33,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:28:33,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 10 equivalence classes. [2025-02-05 15:28:33,457 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 93 of 93 statements. [2025-02-05 15:28:33,457 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-05 15:28:33,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:28:33,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-02-05 15:28:33,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:28:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 45 proven. 187 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2025-02-05 15:28:33,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:28:41,908 WARN L851 $PredicateComparison]: unable to prove that (or (= (+ |c_ULTIMATE.start_main_~y~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2025-02-05 15:28:53,974 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-02-05 15:29:09,998 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-02-05 15:29:14,014 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 10)) 30) 0) (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26|)) (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|)))))) is different from true [2025-02-05 15:29:31,620 WARN L286 SmtUtils]: Spent 9.59s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-02-05 15:29:47,654 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-02-05 15:29:52,042 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 10)) 30) 0) (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26|)) (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2025-02-05 15:30:08,097 WARN L851 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2)) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)))) is different from false