./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.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 ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:34:25,495 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:34:25,527 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:34:25,533 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:34:25,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:34:25,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:34:25,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:34:25,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:34:25,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:34:25,547 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:34:25,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:34:25,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:34:25,547 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:34:25,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:34:25,547 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:34:25,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:34:25,548 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:34:25,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:34:25,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:34:25,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:34:25,549 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 -> ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 [2025-02-07 20:34:25,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:34:25,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:34:25,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:34:25,756 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:34:25,757 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:34:25,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2025-02-07 20:34:26,832 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/503257ae4/1f3eb2744a0b4353a2aded828df3600d/FLAGa86fde1db [2025-02-07 20:34:27,107 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:34:27,111 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2025-02-07 20:34:27,119 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/503257ae4/1f3eb2744a0b4353a2aded828df3600d/FLAGa86fde1db [2025-02-07 20:34:27,414 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/503257ae4/1f3eb2744a0b4353a2aded828df3600d [2025-02-07 20:34:27,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:34:27,418 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:34:27,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:34:27,421 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:34:27,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:34:27,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200b0d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27, skipping insertion in model container [2025-02-07 20:34:27,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,444 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:34:27,577 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/egcd2-ll_valuebound2.c[490,503] [2025-02-07 20:34:27,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:34:27,606 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:34:27,615 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/egcd2-ll_valuebound2.c[490,503] [2025-02-07 20:34:27,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:34:27,634 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:34:27,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27 WrapperNode [2025-02-07 20:34:27,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:34:27,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:34:27,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:34:27,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:34:27,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,657 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2025-02-07 20:34:27,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:34:27,658 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:34:27,658 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:34:27,659 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:34:27,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,665 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,676 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 20:34:27,676 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,678 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,680 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,684 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:34:27,685 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:34:27,685 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:34:27,685 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:34:27,686 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (1/1) ... [2025-02-07 20:34:27,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:34:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:27,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:34:27,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:34:27,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:34:27,734 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-07 20:34:27,734 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-07 20:34:27,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:34:27,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:34:27,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:34:27,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 20:34:27,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 20:34:27,780 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:34:27,781 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:34:27,925 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-02-07 20:34:27,925 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:34:27,933 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:34:27,933 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:34:27,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:34:27 BoogieIcfgContainer [2025-02-07 20:34:27,933 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:34:27,935 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:34:27,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:34:27,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:34:27,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:34:27" (1/3) ... [2025-02-07 20:34:27,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d9b574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:34:27, skipping insertion in model container [2025-02-07 20:34:27,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:27" (2/3) ... [2025-02-07 20:34:27,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d9b574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:34:27, skipping insertion in model container [2025-02-07 20:34:27,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:34:27" (3/3) ... [2025-02-07 20:34:27,940 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2025-02-07 20:34:27,949 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:34:27,950 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound2.c that has 3 procedures, 33 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-07 20:34:27,983 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:34:27,990 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;@630bd470, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:34:27,991 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:34:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-07 20:34:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-07 20:34:27,998 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:27,998 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:27,999 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:28,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash 601073587, now seen corresponding path program 1 times [2025-02-07 20:34:28,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:28,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570354254] [2025-02-07 20:34:28,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:28,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:28,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-07 20:34:28,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 20:34:28,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:28,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-07 20:34:28,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:28,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570354254] [2025-02-07 20:34:28,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570354254] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:28,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388784075] [2025-02-07 20:34:28,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:28,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:28,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:28,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:34:28,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-07 20:34:28,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 20:34:28,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:28,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:28,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-07 20:34:28,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-07 20:34:28,181 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:28,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388784075] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:28,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:28,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-07 20:34:28,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871617083] [2025-02-07 20:34:28,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:28,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 20:34:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:28,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 20:34:28,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:34:28,198 INFO L87 Difference]: Start difference. First operand has 33 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:34:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:28,226 INFO L93 Difference]: Finished difference Result 64 states and 105 transitions. [2025-02-07 20:34:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 20:34:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2025-02-07 20:34:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:28,234 INFO L225 Difference]: With dead ends: 64 [2025-02-07 20:34:28,234 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 20:34:28,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:34:28,238 INFO L435 NwaCegarLoop]: 44 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, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:28,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 20:34:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-02-07 20:34:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-07 20:34:28,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2025-02-07 20:34:28,263 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 38 [2025-02-07 20:34:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:28,263 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2025-02-07 20:34:28,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:34:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2025-02-07 20:34:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 20:34:28,264 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:28,265 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:28,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-07 20:34:28,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-07 20:34:28,469 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:28,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1437461327, now seen corresponding path program 1 times [2025-02-07 20:34:28,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:28,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687025268] [2025-02-07 20:34:28,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:28,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:28,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 20:34:28,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:34:28,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:28,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 20:34:28,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:28,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687025268] [2025-02-07 20:34:28,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687025268] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:28,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015201933] [2025-02-07 20:34:28,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:28,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:28,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:28,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:34:28,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 20:34:28,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:34:28,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:28,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:28,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-07 20:34:28,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 20:34:28,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:29,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015201933] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:29,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:29,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2025-02-07 20:34:29,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933597529] [2025-02-07 20:34:29,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:29,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 20:34:29,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:29,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 20:34:29,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2025-02-07 20:34:29,113 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-07 20:34:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:29,299 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2025-02-07 20:34:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 20:34:29,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2025-02-07 20:34:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:29,301 INFO L225 Difference]: With dead ends: 51 [2025-02-07 20:34:29,301 INFO L226 Difference]: Without dead ends: 43 [2025-02-07 20:34:29,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2025-02-07 20:34:29,301 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:29,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 212 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-02-07 20:34:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2025-02-07 20:34:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-07 20:34:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2025-02-07 20:34:29,317 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 39 [2025-02-07 20:34:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:29,317 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2025-02-07 20:34:29,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-07 20:34:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2025-02-07 20:34:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 20:34:29,318 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:29,318 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:29,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 20:34:29,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:29,519 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:29,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1581716025, now seen corresponding path program 1 times [2025-02-07 20:34:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932127964] [2025-02-07 20:34:29,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:29,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:34:29,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:34:29,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:29,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:29,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798766600] [2025-02-07 20:34:29,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:29,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:29,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:34:29,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:34:29,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:34:29,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:29,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:29,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:34:29,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-07 20:34:29,631 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932127964] [2025-02-07 20:34:29,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798766600] [2025-02-07 20:34:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798766600] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:29,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:29,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521983135] [2025-02-07 20:34:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:29,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:29,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:29,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:29,634 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-07 20:34:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:29,677 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2025-02-07 20:34:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2025-02-07 20:34:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:29,679 INFO L225 Difference]: With dead ends: 61 [2025-02-07 20:34:29,680 INFO L226 Difference]: Without dead ends: 59 [2025-02-07 20:34:29,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:34:29,680 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:29,680 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-07 20:34:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2025-02-07 20:34:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-07 20:34:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2025-02-07 20:34:29,694 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2025-02-07 20:34:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:29,694 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2025-02-07 20:34:29,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-07 20:34:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2025-02-07 20:34:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-07 20:34:29,696 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:29,696 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:29,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:34:29,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:29,898 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:29,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1341765634, now seen corresponding path program 1 times [2025-02-07 20:34:29,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:29,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018839017] [2025-02-07 20:34:29,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:29,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:29,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-07 20:34:29,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-07 20:34:29,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:29,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879779374] [2025-02-07 20:34:29,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:29,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:29,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:29,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:34:29,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-07 20:34:29,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-07 20:34:29,989 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:29,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:29,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:34:29,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-07 20:34:30,064 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:30,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:30,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018839017] [2025-02-07 20:34:30,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:30,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879779374] [2025-02-07 20:34:30,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879779374] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:30,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:30,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:30,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885818965] [2025-02-07 20:34:30,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:30,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:30,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:30,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:30,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:30,066 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 20:34:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:30,106 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2025-02-07 20:34:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:30,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2025-02-07 20:34:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:30,108 INFO L225 Difference]: With dead ends: 57 [2025-02-07 20:34:30,108 INFO L226 Difference]: Without dead ends: 55 [2025-02-07 20:34:30,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:34:30,109 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:30,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 142 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-07 20:34:30,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2025-02-07 20:34:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-07 20:34:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2025-02-07 20:34:30,123 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 45 [2025-02-07 20:34:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:30,123 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2025-02-07 20:34:30,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 20:34:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2025-02-07 20:34:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-07 20:34:30,124 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:30,124 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:30,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 20:34:30,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:30,329 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:30,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:30,330 INFO L85 PathProgramCache]: Analyzing trace with hash 546114014, now seen corresponding path program 1 times [2025-02-07 20:34:30,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:30,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191011493] [2025-02-07 20:34:30,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:30,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:30,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-07 20:34:30,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 20:34:30,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:30,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:30,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223152418] [2025-02-07 20:34:30,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:30,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:30,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:30,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:30,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:34:30,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-07 20:34:30,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 20:34:30,414 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:30,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:30,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-07 20:34:30,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 20:34:30,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:30,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:30,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191011493] [2025-02-07 20:34:30,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:30,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223152418] [2025-02-07 20:34:30,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223152418] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:30,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:30,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-02-07 20:34:30,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619890508] [2025-02-07 20:34:30,669 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:30,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 20:34:30,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:30,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 20:34:30,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:34:30,670 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-07 20:34:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:30,748 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2025-02-07 20:34:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:34:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2025-02-07 20:34:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:30,749 INFO L225 Difference]: With dead ends: 61 [2025-02-07 20:34:30,749 INFO L226 Difference]: Without dead ends: 59 [2025-02-07 20:34:30,749 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:34:30,750 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:30,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 133 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-07 20:34:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2025-02-07 20:34:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-07 20:34:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2025-02-07 20:34:30,760 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 55 [2025-02-07 20:34:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:30,760 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2025-02-07 20:34:30,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-07 20:34:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2025-02-07 20:34:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-07 20:34:30,761 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:30,761 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:30,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 20:34:30,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:30,965 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:30,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash 597664100, now seen corresponding path program 1 times [2025-02-07 20:34:30,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:30,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472159669] [2025-02-07 20:34:30,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:30,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:30,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-02-07 20:34:30,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 20:34:30,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:30,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:30,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291404400] [2025-02-07 20:34:30,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:30,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:30,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:30,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:30,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 20:34:31,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-02-07 20:34:31,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 20:34:31,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:31,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:31,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:34:31,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 20:34:31,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 20:34:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472159669] [2025-02-07 20:34:31,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291404400] [2025-02-07 20:34:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291404400] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:31,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:31,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-02-07 20:34:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139407388] [2025-02-07 20:34:31,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:31,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:34:31,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:31,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:34:31,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:34:31,242 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-07 20:34:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:31,322 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2025-02-07 20:34:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:34:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 62 [2025-02-07 20:34:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:31,323 INFO L225 Difference]: With dead ends: 86 [2025-02-07 20:34:31,323 INFO L226 Difference]: Without dead ends: 84 [2025-02-07 20:34:31,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:34:31,324 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:31,328 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 152 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-07 20:34:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2025-02-07 20:34:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-07 20:34:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2025-02-07 20:34:31,345 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 62 [2025-02-07 20:34:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:31,345 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2025-02-07 20:34:31,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-07 20:34:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2025-02-07 20:34:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-02-07 20:34:31,348 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:31,348 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:31,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 20:34:31,553 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,SelfDestructingSolverStorable5 [2025-02-07 20:34:31,553 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:31,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:31,554 INFO L85 PathProgramCache]: Analyzing trace with hash -695860510, now seen corresponding path program 1 times [2025-02-07 20:34:31,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:31,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722031181] [2025-02-07 20:34:31,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:31,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:31,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-07 20:34:31,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-07 20:34:31,565 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:31,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-07 20:34:31,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722031181] [2025-02-07 20:34:31,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722031181] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490319933] [2025-02-07 20:34:31,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:31,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:31,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:31,722 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:31,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 20:34:31,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-07 20:34:31,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-07 20:34:31,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:31,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:31,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:34:31,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-07 20:34:31,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-07 20:34:31,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490319933] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:31,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:31,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-02-07 20:34:31,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317317077] [2025-02-07 20:34:31,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:31,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 20:34:31,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:31,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 20:34:31,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:34:31,898 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-07 20:34:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:32,026 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2025-02-07 20:34:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 20:34:32,027 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2025-02-07 20:34:32,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:32,029 INFO L225 Difference]: With dead ends: 101 [2025-02-07 20:34:32,029 INFO L226 Difference]: Without dead ends: 93 [2025-02-07 20:34:32,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:34:32,030 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:32,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 217 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-02-07 20:34:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2025-02-07 20:34:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2025-02-07 20:34:32,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2025-02-07 20:34:32,052 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 64 [2025-02-07 20:34:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:32,052 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2025-02-07 20:34:32,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-07 20:34:32,053 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2025-02-07 20:34:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-02-07 20:34:32,053 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:32,053 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:32,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 20:34:32,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:32,259 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:32,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash -719254161, now seen corresponding path program 1 times [2025-02-07 20:34:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:32,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285515736] [2025-02-07 20:34:32,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:32,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-02-07 20:34:32,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-02-07 20:34:32,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:32,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:32,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222641806] [2025-02-07 20:34:32,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:32,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:32,279 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:32,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 20:34:32,307 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-02-07 20:34:32,324 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-02-07 20:34:32,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:32,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:32,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-07 20:34:32,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-07 20:34:32,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-07 20:34:32,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285515736] [2025-02-07 20:34:32,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222641806] [2025-02-07 20:34:32,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222641806] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:32,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:32,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2025-02-07 20:34:32,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246539210] [2025-02-07 20:34:32,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:32,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 20:34:32,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:32,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 20:34:32,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-02-07 20:34:32,960 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-07 20:34:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:33,550 INFO L93 Difference]: Finished difference Result 135 states and 194 transitions. [2025-02-07 20:34:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 20:34:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) Word has length 70 [2025-02-07 20:34:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:33,553 INFO L225 Difference]: With dead ends: 135 [2025-02-07 20:34:33,554 INFO L226 Difference]: Without dead ends: 132 [2025-02-07 20:34:33,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2025-02-07 20:34:33,555 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 73 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:33,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 351 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 20:34:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-07 20:34:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2025-02-07 20:34:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 49 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2025-02-07 20:34:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 175 transitions. [2025-02-07 20:34:33,603 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 175 transitions. Word has length 70 [2025-02-07 20:34:33,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:33,603 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 175 transitions. [2025-02-07 20:34:33,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-07 20:34:33,603 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 175 transitions. [2025-02-07 20:34:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-07 20:34:33,604 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:33,604 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:33,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 20:34:33,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:33,804 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:33,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1651153302, now seen corresponding path program 2 times [2025-02-07 20:34:33,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:33,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111950466] [2025-02-07 20:34:33,809 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:33,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:33,814 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-02-07 20:34:33,842 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 20:34:33,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:33,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677419311] [2025-02-07 20:34:33,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:33,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:33,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:33,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:33,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 20:34:33,872 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-02-07 20:34:33,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 20:34:33,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:33,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:33,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-07 20:34:33,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-07 20:34:34,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111950466] [2025-02-07 20:34:34,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677419311] [2025-02-07 20:34:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677419311] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:34,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-02-07 20:34:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957197354] [2025-02-07 20:34:34,123 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:34,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:34:34,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:34,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:34:34,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:34:34,125 INFO L87 Difference]: Start difference. First operand 122 states and 175 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-07 20:34:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:34,250 INFO L93 Difference]: Finished difference Result 139 states and 195 transitions. [2025-02-07 20:34:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:34:34,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2025-02-07 20:34:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:34,252 INFO L225 Difference]: With dead ends: 139 [2025-02-07 20:34:34,252 INFO L226 Difference]: Without dead ends: 137 [2025-02-07 20:34:34,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:34:34,253 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:34,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 210 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-02-07 20:34:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2025-02-07 20:34:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 75 states have internal predecessors, (88), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2025-02-07 20:34:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 192 transitions. [2025-02-07 20:34:34,290 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 192 transitions. Word has length 75 [2025-02-07 20:34:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:34,291 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 192 transitions. [2025-02-07 20:34:34,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-07 20:34:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 192 transitions. [2025-02-07 20:34:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-07 20:34:34,295 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:34,295 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:34,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 20:34:34,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:34,499 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:34,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash -475498993, now seen corresponding path program 3 times [2025-02-07 20:34:34,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:34,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541057596] [2025-02-07 20:34:34,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:34:34,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:34,506 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 80 statements into 6 equivalence classes. [2025-02-07 20:34:34,529 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 80 of 80 statements. [2025-02-07 20:34:34,530 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:34:34,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67353379] [2025-02-07 20:34:34,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:34:34,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:34,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:34,532 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:34,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 20:34:34,557 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 80 statements into 6 equivalence classes. [2025-02-07 20:34:34,574 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 49 of 80 statements. [2025-02-07 20:34:34,574 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 20:34:34,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:34,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-07 20:34:34,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-02-07 20:34:34,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:35,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:35,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541057596] [2025-02-07 20:34:35,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:35,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67353379] [2025-02-07 20:34:35,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67353379] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:35,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:35,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2025-02-07 20:34:35,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944157170] [2025-02-07 20:34:35,139 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:35,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 20:34:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:35,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 20:34:35,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-02-07 20:34:35,141 INFO L87 Difference]: Start difference. First operand 136 states and 192 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2025-02-07 20:34:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:35,350 INFO L93 Difference]: Finished difference Result 143 states and 198 transitions. [2025-02-07 20:34:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:34:35,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 80 [2025-02-07 20:34:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:35,352 INFO L225 Difference]: With dead ends: 143 [2025-02-07 20:34:35,352 INFO L226 Difference]: Without dead ends: 141 [2025-02-07 20:34:35,352 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:34:35,352 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:35,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 223 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:34:35,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-02-07 20:34:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2025-02-07 20:34:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 78 states have internal predecessors, (91), 53 states have call successors, (53), 10 states have call predecessors, (53), 10 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2025-02-07 20:34:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 195 transitions. [2025-02-07 20:34:35,370 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 195 transitions. Word has length 80 [2025-02-07 20:34:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:35,371 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 195 transitions. [2025-02-07 20:34:35,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2025-02-07 20:34:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 195 transitions. [2025-02-07 20:34:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-02-07 20:34:35,372 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:35,372 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:35,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 20:34:35,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-07 20:34:35,573 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:35,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1575153535, now seen corresponding path program 1 times [2025-02-07 20:34:35,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:35,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959773947] [2025-02-07 20:34:35,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:35,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:35,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-02-07 20:34:35,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-02-07 20:34:35,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:35,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:35,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808850975] [2025-02-07 20:34:35,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:35,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:35,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:35,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:35,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 20:34:35,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-02-07 20:34:35,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-02-07 20:34:35,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:35,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:35,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-07 20:34:35,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2025-02-07 20:34:36,059 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-02-07 20:34:36,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959773947] [2025-02-07 20:34:36,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808850975] [2025-02-07 20:34:36,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808850975] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:36,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:36,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-02-07 20:34:36,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397331773] [2025-02-07 20:34:36,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:36,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 20:34:36,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:36,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 20:34:36,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-02-07 20:34:36,340 INFO L87 Difference]: Start difference. First operand 140 states and 195 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-02-07 20:34:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:38,065 INFO L93 Difference]: Finished difference Result 246 states and 369 transitions. [2025-02-07 20:34:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-07 20:34:38,069 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 86 [2025-02-07 20:34:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:38,071 INFO L225 Difference]: With dead ends: 246 [2025-02-07 20:34:38,071 INFO L226 Difference]: Without dead ends: 242 [2025-02-07 20:34:38,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 20:34:38,072 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:38,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 572 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-07 20:34:38,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2025-02-07 20:34:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2025-02-07 20:34:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 120 states have (on average 1.25) internal successors, (150), 123 states have internal predecessors, (150), 106 states have call successors, (106), 12 states have call predecessors, (106), 12 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2025-02-07 20:34:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 360 transitions. [2025-02-07 20:34:38,147 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 360 transitions. Word has length 86 [2025-02-07 20:34:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:38,147 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 360 transitions. [2025-02-07 20:34:38,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-02-07 20:34:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 360 transitions. [2025-02-07 20:34:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-02-07 20:34:38,148 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:38,148 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:38,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 20:34:38,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-07 20:34:38,349 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:38,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:38,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2061435719, now seen corresponding path program 4 times [2025-02-07 20:34:38,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:38,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044237665] [2025-02-07 20:34:38,349 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:34:38,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:38,354 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 100 statements into 2 equivalence classes. [2025-02-07 20:34:38,360 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 96 of 100 statements. [2025-02-07 20:34:38,360 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 20:34:38,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2025-02-07 20:34:38,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:38,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044237665] [2025-02-07 20:34:38,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044237665] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:38,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:38,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744209780] [2025-02-07 20:34:38,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:38,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:38,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:38,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:38,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:38,425 INFO L87 Difference]: Start difference. First operand 239 states and 360 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2025-02-07 20:34:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:38,497 INFO L93 Difference]: Finished difference Result 296 states and 439 transitions. [2025-02-07 20:34:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:34:38,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2025-02-07 20:34:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:38,500 INFO L225 Difference]: With dead ends: 296 [2025-02-07 20:34:38,500 INFO L226 Difference]: Without dead ends: 197 [2025-02-07 20:34:38,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:34:38,502 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:38,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 167 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2025-02-07 20:34:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2025-02-07 20:34:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 97 states have internal predecessors, (111), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2025-02-07 20:34:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 265 transitions. [2025-02-07 20:34:38,543 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 265 transitions. Word has length 100 [2025-02-07 20:34:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:38,544 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 265 transitions. [2025-02-07 20:34:38,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2025-02-07 20:34:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 265 transitions. [2025-02-07 20:34:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-02-07 20:34:38,545 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:38,545 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:38,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-07 20:34:38,545 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:38,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1138395308, now seen corresponding path program 1 times [2025-02-07 20:34:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:38,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596954943] [2025-02-07 20:34:38,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:38,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:38,550 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 102 statements into 1 equivalence classes. [2025-02-07 20:34:38,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 102 of 102 statements. [2025-02-07 20:34:38,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:38,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2025-02-07 20:34:38,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:38,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596954943] [2025-02-07 20:34:38,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596954943] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:38,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849708974] [2025-02-07 20:34:38,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:38,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:38,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:38,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:38,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 20:34:38,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 102 statements into 1 equivalence classes. [2025-02-07 20:34:38,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 102 of 102 statements. [2025-02-07 20:34:38,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:38,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:38,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 20:34:38,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 122 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2025-02-07 20:34:38,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2025-02-07 20:34:39,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849708974] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:39,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:39,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-02-07 20:34:39,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833089318] [2025-02-07 20:34:39,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:39,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 20:34:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:39,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 20:34:39,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:34:39,019 INFO L87 Difference]: Start difference. First operand 185 states and 265 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2025-02-07 20:34:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:39,227 INFO L93 Difference]: Finished difference Result 251 states and 359 transitions. [2025-02-07 20:34:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 20:34:39,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 102 [2025-02-07 20:34:39,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:39,228 INFO L225 Difference]: With dead ends: 251 [2025-02-07 20:34:39,228 INFO L226 Difference]: Without dead ends: 164 [2025-02-07 20:34:39,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2025-02-07 20:34:39,229 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 47 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:39,229 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 222 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:39,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2025-02-07 20:34:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2025-02-07 20:34:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 88 states have internal predecessors, (98), 66 states have call successors, (66), 12 states have call predecessors, (66), 12 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2025-02-07 20:34:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2025-02-07 20:34:39,274 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 102 [2025-02-07 20:34:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:39,274 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2025-02-07 20:34:39,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2025-02-07 20:34:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2025-02-07 20:34:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-02-07 20:34:39,275 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:39,275 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:39,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 20:34:39,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:39,476 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:39,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash 242295287, now seen corresponding path program 1 times [2025-02-07 20:34:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:39,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432712256] [2025-02-07 20:34:39,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:39,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:39,480 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 116 statements into 1 equivalence classes. [2025-02-07 20:34:39,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 116 of 116 statements. [2025-02-07 20:34:39,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:39,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-02-07 20:34:39,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432712256] [2025-02-07 20:34:39,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432712256] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050886351] [2025-02-07 20:34:39,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:39,578 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:39,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 20:34:39,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 116 statements into 1 equivalence classes. [2025-02-07 20:34:39,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 116 of 116 statements. [2025-02-07 20:34:39,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:39,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:39,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:34:39,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2025-02-07 20:34:39,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-02-07 20:34:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050886351] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:39,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:39,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2025-02-07 20:34:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549573705] [2025-02-07 20:34:39,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:39,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:34:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:39,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:34:39,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:34:39,740 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-02-07 20:34:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:39,904 INFO L93 Difference]: Finished difference Result 190 states and 267 transitions. [2025-02-07 20:34:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:34:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 116 [2025-02-07 20:34:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:39,906 INFO L225 Difference]: With dead ends: 190 [2025-02-07 20:34:39,906 INFO L226 Difference]: Without dead ends: 178 [2025-02-07 20:34:39,907 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 229 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2025-02-07 20:34:39,907 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 17 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:39,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 319 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2025-02-07 20:34:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 159. [2025-02-07 20:34:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 65 states have call successors, (65), 11 states have call predecessors, (65), 11 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2025-02-07 20:34:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 222 transitions. [2025-02-07 20:34:39,960 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 222 transitions. Word has length 116 [2025-02-07 20:34:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:39,960 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 222 transitions. [2025-02-07 20:34:39,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-02-07 20:34:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 222 transitions. [2025-02-07 20:34:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-02-07 20:34:39,961 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:39,961 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:39,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 20:34:40,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:40,163 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:40,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash 871849659, now seen corresponding path program 2 times [2025-02-07 20:34:40,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:40,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073888518] [2025-02-07 20:34:40,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:40,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:40,173 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-02-07 20:34:40,189 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-02-07 20:34:40,189 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:40,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2025-02-07 20:34:40,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073888518] [2025-02-07 20:34:40,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073888518] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858797571] [2025-02-07 20:34:40,336 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:40,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:40,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:40,341 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:40,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 20:34:40,368 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-02-07 20:34:40,390 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-02-07 20:34:40,390 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:40,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:40,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 20:34:40,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 103 proven. 18 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2025-02-07 20:34:40,490 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2025-02-07 20:34:40,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858797571] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:40,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:40,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2025-02-07 20:34:40,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743150080] [2025-02-07 20:34:40,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:40,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-07 20:34:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:40,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-07 20:34:40,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2025-02-07 20:34:40,599 INFO L87 Difference]: Start difference. First operand 159 states and 222 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2025-02-07 20:34:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:40,794 INFO L93 Difference]: Finished difference Result 192 states and 269 transitions. [2025-02-07 20:34:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 20:34:40,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 117 [2025-02-07 20:34:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:40,795 INFO L225 Difference]: With dead ends: 192 [2025-02-07 20:34:40,795 INFO L226 Difference]: Without dead ends: 156 [2025-02-07 20:34:40,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 223 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2025-02-07 20:34:40,796 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:40,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 346 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-02-07 20:34:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2025-02-07 20:34:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 81 states have internal predecessors, (88), 65 states have call successors, (65), 11 states have call predecessors, (65), 11 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2025-02-07 20:34:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 216 transitions. [2025-02-07 20:34:40,826 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 216 transitions. Word has length 117 [2025-02-07 20:34:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:40,826 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 216 transitions. [2025-02-07 20:34:40,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2025-02-07 20:34:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 216 transitions. [2025-02-07 20:34:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-02-07 20:34:40,827 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:40,827 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:40,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-07 20:34:41,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-07 20:34:41,032 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:41,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 40184011, now seen corresponding path program 2 times [2025-02-07 20:34:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:41,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357212961] [2025-02-07 20:34:41,033 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:41,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 133 statements into 2 equivalence classes. [2025-02-07 20:34:41,067 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 133 of 133 statements. [2025-02-07 20:34:41,067 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:41,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:41,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585629798] [2025-02-07 20:34:41,068 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:41,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:41,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:41,070 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:41,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 20:34:41,099 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 133 statements into 2 equivalence classes. [2025-02-07 20:34:41,130 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 133 of 133 statements. [2025-02-07 20:34:41,130 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:41,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:41,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 20:34:41,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 76 proven. 59 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-02-07 20:34:41,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357212961] [2025-02-07 20:34:42,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585629798] [2025-02-07 20:34:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585629798] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:42,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:42,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-02-07 20:34:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067078302] [2025-02-07 20:34:42,659 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:42,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 20:34:42,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:42,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 20:34:42,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2025-02-07 20:34:42,661 INFO L87 Difference]: Start difference. First operand 156 states and 216 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2025-02-07 20:34:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:43,379 INFO L93 Difference]: Finished difference Result 193 states and 272 transitions. [2025-02-07 20:34:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 20:34:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 133 [2025-02-07 20:34:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:43,382 INFO L225 Difference]: With dead ends: 193 [2025-02-07 20:34:43,382 INFO L226 Difference]: Without dead ends: 191 [2025-02-07 20:34:43,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 20:34:43,383 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:43,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 437 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 20:34:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-02-07 20:34:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2025-02-07 20:34:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 90 states have internal predecessors, (98), 70 states have call successors, (70), 12 states have call predecessors, (70), 12 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2025-02-07 20:34:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 236 transitions. [2025-02-07 20:34:43,426 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 236 transitions. Word has length 133 [2025-02-07 20:34:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:43,426 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 236 transitions. [2025-02-07 20:34:43,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2025-02-07 20:34:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 236 transitions. [2025-02-07 20:34:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2025-02-07 20:34:43,428 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:43,428 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:43,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 20:34:43,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 20:34:43,632 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:43,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1893339014, now seen corresponding path program 2 times [2025-02-07 20:34:43,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346665108] [2025-02-07 20:34:43,632 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:43,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:43,637 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 138 statements into 2 equivalence classes. [2025-02-07 20:34:43,648 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 138 of 138 statements. [2025-02-07 20:34:43,649 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:43,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:43,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618470055] [2025-02-07 20:34:43,649 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:43,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:43,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:43,655 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:43,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 20:34:43,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 138 statements into 2 equivalence classes. [2025-02-07 20:34:43,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 138 of 138 statements. [2025-02-07 20:34:43,717 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:43,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:43,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-07 20:34:43,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 86 proven. 54 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2025-02-07 20:34:44,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2025-02-07 20:34:44,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:44,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346665108] [2025-02-07 20:34:44,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:44,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618470055] [2025-02-07 20:34:44,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618470055] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:44,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:44,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2025-02-07 20:34:44,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857668372] [2025-02-07 20:34:44,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:44,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 20:34:44,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:44,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 20:34:44,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2025-02-07 20:34:44,419 INFO L87 Difference]: Start difference. First operand 170 states and 236 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2025-02-07 20:34:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:46,033 INFO L93 Difference]: Finished difference Result 205 states and 285 transitions. [2025-02-07 20:34:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-07 20:34:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 138 [2025-02-07 20:34:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:46,036 INFO L225 Difference]: With dead ends: 205 [2025-02-07 20:34:46,036 INFO L226 Difference]: Without dead ends: 196 [2025-02-07 20:34:46,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=391, Invalid=1961, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 20:34:46,037 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 104 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:46,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 493 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 20:34:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-02-07 20:34:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 174. [2025-02-07 20:34:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 91 states have (on average 1.10989010989011) internal successors, (101), 93 states have internal predecessors, (101), 69 states have call successors, (69), 13 states have call predecessors, (69), 13 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2025-02-07 20:34:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 238 transitions. [2025-02-07 20:34:46,113 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 238 transitions. Word has length 138 [2025-02-07 20:34:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:46,113 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 238 transitions. [2025-02-07 20:34:46,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2025-02-07 20:34:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 238 transitions. [2025-02-07 20:34:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2025-02-07 20:34:46,114 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:46,114 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:46,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-07 20:34:46,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 20:34:46,318 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:46,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:46,319 INFO L85 PathProgramCache]: Analyzing trace with hash 859495071, now seen corresponding path program 3 times [2025-02-07 20:34:46,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:46,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588852216] [2025-02-07 20:34:46,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:34:46,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:46,324 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 141 statements into 11 equivalence classes. [2025-02-07 20:34:46,347 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 131 of 141 statements. [2025-02-07 20:34:46,348 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-07 20:34:46,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 54 proven. 51 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2025-02-07 20:34:46,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:46,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588852216] [2025-02-07 20:34:46,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588852216] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:46,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101955905] [2025-02-07 20:34:46,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:34:46,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:46,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:46,526 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:46,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 20:34:46,559 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 141 statements into 11 equivalence classes. [2025-02-07 20:34:46,580 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 78 of 141 statements. [2025-02-07 20:34:46,580 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 20:34:46,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:46,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-07 20:34:46,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 115 proven. 47 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2025-02-07 20:34:46,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:47,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101955905] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:47,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:47,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2025-02-07 20:34:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786653553] [2025-02-07 20:34:47,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:47,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 20:34:47,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:47,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 20:34:47,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2025-02-07 20:34:47,169 INFO L87 Difference]: Start difference. First operand 174 states and 238 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 11 states have call predecessors, (40), 12 states have call successors, (40) [2025-02-07 20:34:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:47,706 INFO L93 Difference]: Finished difference Result 245 states and 330 transitions. [2025-02-07 20:34:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 20:34:47,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 11 states have call predecessors, (40), 12 states have call successors, (40) Word has length 141 [2025-02-07 20:34:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:47,708 INFO L225 Difference]: With dead ends: 245 [2025-02-07 20:34:47,708 INFO L226 Difference]: Without dead ends: 180 [2025-02-07 20:34:47,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 20:34:47,709 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:47,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 483 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:34:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2025-02-07 20:34:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2025-02-07 20:34:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 15 states have call predecessors, (69), 15 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2025-02-07 20:34:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 240 transitions. [2025-02-07 20:34:47,754 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 240 transitions. Word has length 141 [2025-02-07 20:34:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:47,754 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 240 transitions. [2025-02-07 20:34:47,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 11 states have call predecessors, (40), 12 states have call successors, (40) [2025-02-07 20:34:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 240 transitions. [2025-02-07 20:34:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2025-02-07 20:34:47,755 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:47,755 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:47,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-07 20:34:47,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 20:34:47,960 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:47,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash 314693645, now seen corresponding path program 4 times [2025-02-07 20:34:47,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:47,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402454544] [2025-02-07 20:34:47,960 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:34:47,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:47,965 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 144 statements into 2 equivalence classes. [2025-02-07 20:34:47,972 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 140 of 144 statements. [2025-02-07 20:34:47,973 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 20:34:47,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 63 proven. 47 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2025-02-07 20:34:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402454544] [2025-02-07 20:34:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402454544] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308763464] [2025-02-07 20:34:48,134 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:34:48,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:48,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:48,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:48,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 20:34:48,166 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 144 statements into 2 equivalence classes. [2025-02-07 20:34:48,188 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 140 of 144 statements. [2025-02-07 20:34:48,188 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 20:34:48,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:48,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 20:34:48,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 187 proven. 47 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2025-02-07 20:34:48,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 57 proven. 53 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2025-02-07 20:34:48,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308763464] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:48,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:48,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2025-02-07 20:34:48,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458419573] [2025-02-07 20:34:48,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:48,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 20:34:48,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:48,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 20:34:48,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:34:48,437 INFO L87 Difference]: Start difference. First operand 179 states and 240 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 17 states have internal predecessors, (51), 13 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (50), 13 states have call predecessors, (50), 13 states have call successors, (50) [2025-02-07 20:34:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:48,786 INFO L93 Difference]: Finished difference Result 267 states and 380 transitions. [2025-02-07 20:34:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 20:34:48,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 17 states have internal predecessors, (51), 13 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (50), 13 states have call predecessors, (50), 13 states have call successors, (50) Word has length 144 [2025-02-07 20:34:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:48,788 INFO L225 Difference]: With dead ends: 267 [2025-02-07 20:34:48,788 INFO L226 Difference]: Without dead ends: 225 [2025-02-07 20:34:48,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-02-07 20:34:48,789 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 40 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:48,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 426 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2025-02-07 20:34:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2025-02-07 20:34:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 109 states have (on average 1.146788990825688) internal successors, (125), 110 states have internal predecessors, (125), 99 states have call successors, (99), 15 states have call predecessors, (99), 15 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2025-02-07 20:34:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 322 transitions. [2025-02-07 20:34:48,854 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 322 transitions. Word has length 144 [2025-02-07 20:34:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:48,854 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 322 transitions. [2025-02-07 20:34:48,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 17 states have internal predecessors, (51), 13 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (50), 13 states have call predecessors, (50), 13 states have call successors, (50) [2025-02-07 20:34:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 322 transitions. [2025-02-07 20:34:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2025-02-07 20:34:48,855 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:48,855 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:48,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 20:34:49,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:49,056 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:49,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:49,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1263460054, now seen corresponding path program 3 times [2025-02-07 20:34:49,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:49,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968701856] [2025-02-07 20:34:49,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:34:49,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:49,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 152 statements into 12 equivalence classes. [2025-02-07 20:34:49,083 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 137 of 152 statements. [2025-02-07 20:34:49,083 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 20:34:49,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 40 proven. 77 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2025-02-07 20:34:49,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:49,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968701856] [2025-02-07 20:34:49,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968701856] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:49,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435064068] [2025-02-07 20:34:49,256 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:34:49,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:49,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:49,258 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:49,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 20:34:49,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 152 statements into 12 equivalence classes. [2025-02-07 20:34:49,317 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 67 of 152 statements. [2025-02-07 20:34:49,317 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 20:34:49,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:49,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-07 20:34:49,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2025-02-07 20:34:49,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:54,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435064068] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:54,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:54,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2025-02-07 20:34:54,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611045714] [2025-02-07 20:34:54,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:54,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 20:34:54,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:54,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 20:34:54,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=818, Unknown=1, NotChecked=0, Total=930 [2025-02-07 20:34:54,306 INFO L87 Difference]: Start difference. First operand 224 states and 322 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 10 states have call predecessors, (40), 12 states have call successors, (40) [2025-02-07 20:34:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:55,466 INFO L93 Difference]: Finished difference Result 298 states and 429 transitions. [2025-02-07 20:34:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-07 20:34:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 10 states have call predecessors, (40), 12 states have call successors, (40) Word has length 152 [2025-02-07 20:34:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:55,469 INFO L225 Difference]: With dead ends: 298 [2025-02-07 20:34:55,469 INFO L226 Difference]: Without dead ends: 282 [2025-02-07 20:34:55,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=458, Invalid=2297, Unknown=1, NotChecked=0, Total=2756 [2025-02-07 20:34:55,470 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 143 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:55,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 503 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 20:34:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2025-02-07 20:34:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 261. [2025-02-07 20:34:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 125 states have (on average 1.136) internal successors, (142), 126 states have internal predecessors, (142), 119 states have call successors, (119), 16 states have call predecessors, (119), 16 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2025-02-07 20:34:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 379 transitions. [2025-02-07 20:34:55,565 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 379 transitions. Word has length 152 [2025-02-07 20:34:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:55,565 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 379 transitions. [2025-02-07 20:34:55,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 10 states have call predecessors, (40), 12 states have call successors, (40) [2025-02-07 20:34:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 379 transitions. [2025-02-07 20:34:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2025-02-07 20:34:55,566 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:55,566 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:55,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-07 20:34:55,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:55,770 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:55,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:55,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2060243112, now seen corresponding path program 4 times [2025-02-07 20:34:55,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:55,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100517711] [2025-02-07 20:34:55,770 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:34:55,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:55,775 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 155 statements into 2 equivalence classes. [2025-02-07 20:34:55,782 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 151 of 155 statements. [2025-02-07 20:34:55,783 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 20:34:55,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 87 proven. 44 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2025-02-07 20:34:56,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:56,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100517711] [2025-02-07 20:34:56,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100517711] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:56,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393057981] [2025-02-07 20:34:56,008 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:34:56,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:56,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:56,010 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:56,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 20:34:56,040 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 155 statements into 2 equivalence classes. [2025-02-07 20:34:56,065 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 151 of 155 statements. [2025-02-07 20:34:56,065 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 20:34:56,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:56,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-07 20:34:56,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 54 proven. 68 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2025-02-07 20:34:56,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 48 proven. 74 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2025-02-07 20:34:56,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393057981] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:56,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:56,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2025-02-07 20:34:56,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619674819] [2025-02-07 20:34:56,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:56,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 20:34:56,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:56,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 20:34:56,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2025-02-07 20:34:56,399 INFO L87 Difference]: Start difference. First operand 261 states and 379 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) [2025-02-07 20:34:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:56,785 INFO L93 Difference]: Finished difference Result 291 states and 403 transitions. [2025-02-07 20:34:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 20:34:56,785 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) Word has length 155 [2025-02-07 20:34:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:56,786 INFO L225 Difference]: With dead ends: 291 [2025-02-07 20:34:56,786 INFO L226 Difference]: Without dead ends: 120 [2025-02-07 20:34:56,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 298 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 20:34:56,787 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 34 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:56,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 613 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:34:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-02-07 20:34:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2025-02-07 20:34:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2025-02-07 20:34:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2025-02-07 20:34:56,822 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 155 [2025-02-07 20:34:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:56,822 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2025-02-07 20:34:56,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) [2025-02-07 20:34:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2025-02-07 20:34:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2025-02-07 20:34:56,823 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:56,823 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:56,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-07 20:34:57,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:57,028 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:57,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:57,029 INFO L85 PathProgramCache]: Analyzing trace with hash -79500797, now seen corresponding path program 5 times [2025-02-07 20:34:57,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:57,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576091436] [2025-02-07 20:34:57,029 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:34:57,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:57,038 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 168 statements into 12 equivalence classes. [2025-02-07 20:34:57,061 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 168 of 168 statements. [2025-02-07 20:34:57,061 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-07 20:34:57,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 98 proven. 54 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2025-02-07 20:34:57,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:57,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576091436] [2025-02-07 20:34:57,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576091436] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:57,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843177680] [2025-02-07 20:34:57,234 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:34:57,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:57,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:57,236 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:57,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 20:34:57,273 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 168 statements into 12 equivalence classes. [2025-02-07 20:34:57,312 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 168 of 168 statements. [2025-02-07 20:34:57,312 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-07 20:34:57,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:57,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-07 20:34:57,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 307 proven. 75 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2025-02-07 20:34:57,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 91 proven. 57 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2025-02-07 20:34:57,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843177680] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:57,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:57,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 28 [2025-02-07 20:34:57,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090329736] [2025-02-07 20:34:57,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:57,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-07 20:34:57,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:57,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-07 20:34:57,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2025-02-07 20:34:57,829 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 22 states have call successors, (80), 2 states have call predecessors, (80), 3 states have return successors, (81), 22 states have call predecessors, (81), 22 states have call successors, (81) [2025-02-07 20:34:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:58,075 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2025-02-07 20:34:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 20:34:58,075 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 22 states have call successors, (80), 2 states have call predecessors, (80), 3 states have return successors, (81), 22 states have call predecessors, (81), 22 states have call successors, (81) Word has length 168 [2025-02-07 20:34:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:58,076 INFO L225 Difference]: With dead ends: 136 [2025-02-07 20:34:58,076 INFO L226 Difference]: Without dead ends: 0 [2025-02-07 20:34:58,076 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 20:34:58,077 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:58,077 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 404 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-07 20:34:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-07 20:34:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:34:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-07 20:34:58,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 168 [2025-02-07 20:34:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:58,078 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-07 20:34:58,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 22 states have call successors, (80), 2 states have call predecessors, (80), 3 states have return successors, (81), 22 states have call predecessors, (81), 22 states have call successors, (81) [2025-02-07 20:34:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-07 20:34:58,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-07 20:34:58,080 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-07 20:34:58,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-07 20:34:58,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-02-07 20:34:58,286 INFO L422 BasicCegarLoop]: Path program histogram: [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:58,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-07 20:35:00,511 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-07 20:35:00,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 08:35:00 BoogieIcfgContainer [2025-02-07 20:35:00,524 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-07 20:35:00,525 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-07 20:35:00,525 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-07 20:35:00,525 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-07 20:35:00,525 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:34:27" (3/4) ... [2025-02-07 20:35:00,527 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-07 20:35:00,531 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2025-02-07 20:35:00,531 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-02-07 20:35:00,533 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-02-07 20:35:00,534 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-07 20:35:00,534 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-07 20:35:00,534 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-07 20:35:00,585 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-07 20:35:00,585 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-07 20:35:00,585 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-07 20:35:00,585 INFO L158 Benchmark]: Toolchain (without parser) took 33167.81ms. Allocated memory was 142.6MB in the beginning and 419.4MB in the end (delta: 276.8MB). Free memory was 111.3MB in the beginning and 291.7MB in the end (delta: -180.4MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. [2025-02-07 20:35:00,585 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 127.4MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 20:35:00,586 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.92ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 99.8MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 20:35:00,586 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.58ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 98.9MB in the end (delta: 953.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 20:35:00,586 INFO L158 Benchmark]: Boogie Preprocessor took 26.74ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 97.1MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 20:35:00,586 INFO L158 Benchmark]: IcfgBuilder took 248.35ms. Allocated memory is still 142.6MB. Free memory was 97.1MB in the beginning and 84.0MB in the end (delta: 13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 20:35:00,586 INFO L158 Benchmark]: TraceAbstraction took 32589.46ms. Allocated memory was 142.6MB in the beginning and 419.4MB in the end (delta: 276.8MB). Free memory was 84.0MB in the beginning and 299.8MB in the end (delta: -215.9MB). Peak memory consumption was 223.3MB. Max. memory is 16.1GB. [2025-02-07 20:35:00,586 INFO L158 Benchmark]: Witness Printer took 60.14ms. Allocated memory is still 419.4MB. Free memory was 299.8MB in the beginning and 291.7MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 20:35:00,587 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 127.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.92ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 99.8MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.58ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 98.9MB in the end (delta: 953.2kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.74ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 97.1MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 248.35ms. Allocated memory is still 142.6MB. Free memory was 97.1MB in the beginning and 84.0MB in the end (delta: 13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 32589.46ms. Allocated memory was 142.6MB in the beginning and 419.4MB in the end (delta: 276.8MB). Free memory was 84.0MB in the beginning and 299.8MB in the end (delta: -215.9MB). Peak memory consumption was 223.3MB. Max. memory is 16.1GB. * Witness Printer took 60.14ms. Allocated memory is still 419.4MB. Free memory was 299.8MB in the beginning and 291.7MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.3s, OverallIterations: 22, TraceHistogramMax: 24, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 9.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 891 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 809 mSDsluCounter, 6801 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5847 mSDsCounter, 968 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6180 IncrementalHoareTripleChecker+Invalid, 7148 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 968 mSolverCounterUnsat, 954 mSDtfsCounter, 6180 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3672 GetRequests, 3189 SyntacticMatches, 32 SemanticMatches, 451 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=261occurred in iteration=20, InterpolantAutomatonStates: 292, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 22 MinimizatonAttempts, 163 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 14.3s InterpolantComputationTime, 4140 NumberOfCodeBlocks, 3916 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 4534 ConstructedInterpolants, 0 QuantifiedInterpolants, 13842 SizeOfPredicates, 65 NumberOfNonLiveVariables, 4418 ConjunctsInSsa, 462 ConjunctsInUnsatCore, 44 InterpolantComputations, 4 PerfectInterpolantSequences, 18494/19683 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 41]: Location Invariant Derived location invariant: ((((((((((((((yy == ((long long) y * y)) && (p == 1)) && (1 <= y)) && (b == y)) && (b <= 2)) && (r == 0)) && (q == 0)) && (1 <= x)) && (xy == ((long long) x * y))) && (a == x)) && (x <= 2)) && (s == 1)) || ((((((((((b == 1) && (2 == xy)) && (p == 0)) && (2 == y)) && (yy <= 2147483646)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a))) || ((((((((y <= 2) && (1 <= y)) && (b == 0)) && (1 <= a)) && (1 <= x)) && ((((__int128) r * y) + ((__int128) p * x)) == a)) && (x <= 2)) && ((((__int128) s * y) + ((__int128) q * x)) == 0))) - InvariantResult [Line: 47]: Location Invariant Derived location invariant: ((((((((((((((((((c == 0) && (b == 1)) && (p == 1)) && (yy == 1)) && (r == 0)) && (q == 0)) && (y == 1)) && (1 <= x)) && (k == x)) && (a == x)) && (x <= 2)) && (xy == x)) && (s == 1)) || ((((((((((((b == 1) && (2 == xy)) && (p == 0)) && (2 == y)) && (yy <= 2147483646)) && (x == 1)) && (q == 1)) && (k == 0)) && (s == 0)) && (r == 1)) && (2 == a)) && (2 == c))) || ((((((((((((c == 0) && (b == 1)) && (2 == xy)) && (p == 0)) && (2 == y)) && (yy <= 2147483646)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a)) && (2 == k))) || ((((((((((((k == 1) && (b == 1)) && (2 == xy)) && (p == 0)) && (c == 1)) && (2 == y)) && (yy <= 2147483646)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a))) || ((((((((((((((yy == ((long long) y * y)) && (p == 1)) && (a == c)) && (b == y)) && (b <= 2)) && (r == 0)) && (q == 0)) && (k == 0)) && (1 <= x)) && (xy == ((long long) x * y))) && (a == x)) && (((__int128) 2 + c) <= ((__int128) b * 4))) && (x <= 2)) && (s == 1))) || (((((((((((((k == 1) && (yy == ((long long) y * y))) && (p == 1)) && (b == y)) && (r == 0)) && (q == 0)) && (xy == ((long long) x * y))) && (a == x)) && (((__int128) 2 + c) <= ((__int128) b * 4))) && ((c == 0) || (b < ((__int128) c + 1)))) && (x <= 2)) && (s == 1)) && (((__int128) b + c) == x))) RESULT: Ultimate proved your program to be correct! [2025-02-07 20:35:00,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE