./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:54:46,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:54:46,711 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:54:46,714 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:54:46,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:54:46,728 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:54:46,729 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:54:46,729 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:54:46,729 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:54:46,729 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:54:46,729 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:54:46,729 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:54:46,730 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:54:46,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:54:46,730 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:54:46,731 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:54:46,731 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:54:46,731 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:54:46,731 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 -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2025-02-05 14:54:46,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:54:47,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:54:47,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:54:47,009 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:54:47,010 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:54:47,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2025-02-05 14:54:48,204 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d84c453d3/fe18f94c97c24d119531e7573f08926d/FLAG84120626c [2025-02-05 14:54:48,392 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:54:48,394 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2025-02-05 14:54:48,400 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d84c453d3/fe18f94c97c24d119531e7573f08926d/FLAG84120626c [2025-02-05 14:54:48,762 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d84c453d3/fe18f94c97c24d119531e7573f08926d [2025-02-05 14:54:48,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:54:48,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:54:48,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:54:48,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:54:48,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:54:48,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9bc58a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48, skipping insertion in model container [2025-02-05 14:54:48,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,779 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:54:48,855 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/loops-crafted-1/mono-crafted_6.c[318,331] [2025-02-05 14:54:48,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:54:48,867 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:54:48,874 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/loops-crafted-1/mono-crafted_6.c[318,331] [2025-02-05 14:54:48,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:54:48,884 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:54:48,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48 WrapperNode [2025-02-05 14:54:48,885 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:54:48,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:54:48,886 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:54:48,886 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:54:48,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,894 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,902 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2025-02-05 14:54:48,902 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:54:48,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:54:48,903 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:54:48,903 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:54:48,908 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,909 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,914 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 14:54:48,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,915 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,916 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:54:48,918 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:54:48,918 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:54:48,918 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:54:48,919 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (1/1) ... [2025-02-05 14:54:48,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:54:48,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:48,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 14:54:48,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 14:54:48,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:54:48,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:54:48,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:54:48,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:54:49,041 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:54:49,043 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:54:49,108 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-05 14:54:49,108 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:54:49,113 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:54:49,114 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:54:49,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:54:49 BoogieIcfgContainer [2025-02-05 14:54:49,114 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:54:49,115 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:54:49,116 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:54:49,118 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:54:49,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:54:48" (1/3) ... [2025-02-05 14:54:49,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71fdd6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:54:49, skipping insertion in model container [2025-02-05 14:54:49,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:48" (2/3) ... [2025-02-05 14:54:49,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71fdd6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:54:49, skipping insertion in model container [2025-02-05 14:54:49,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:54:49" (3/3) ... [2025-02-05 14:54:49,120 INFO L128 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2025-02-05 14:54:49,129 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:54:49,130 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mono-crafted_6.c that has 1 procedures, 13 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-05 14:54:49,199 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:54:49,209 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;@53bdf616, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:54:49,210 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:54:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2025-02-05 14:54:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-02-05 14:54:49,217 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:49,217 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-02-05 14:54:49,218 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:49,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:49,222 INFO L85 PathProgramCache]: Analyzing trace with hash 42905926, now seen corresponding path program 1 times [2025-02-05 14:54:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:49,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160610169] [2025-02-05 14:54:49,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:49,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-05 14:54:49,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-05 14:54:49,300 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:49,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:49,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:49,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160610169] [2025-02-05 14:54:49,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160610169] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:54:49,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:54:49,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 14:54:49,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122832210] [2025-02-05 14:54:49,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:54:49,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 14:54:49,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:49,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 14:54:49,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 14:54:49,481 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2025-02-05 14:54:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:49,510 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2025-02-05 14:54:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 14:54:49,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) Word has length 5 [2025-02-05 14:54:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:49,516 INFO L225 Difference]: With dead ends: 26 [2025-02-05 14:54:49,516 INFO L226 Difference]: Without dead ends: 11 [2025-02-05 14:54:49,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 14:54:49,520 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:49,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:54:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-05 14:54:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-02-05 14:54:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2025-02-05 14:54:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-02-05 14:54:49,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2025-02-05 14:54:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:49,542 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-02-05 14:54:49,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2025-02-05 14:54:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-02-05 14:54:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-05 14:54:49,543 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:49,543 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:49,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 14:54:49,544 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:49,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:49,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1711444533, now seen corresponding path program 1 times [2025-02-05 14:54:49,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:49,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495689834] [2025-02-05 14:54:49,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:49,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:49,553 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 14:54:49,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 14:54:49,565 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:49,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495689834] [2025-02-05 14:54:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495689834] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633183805] [2025-02-05 14:54:49,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:49,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:49,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:49,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 14:54:49,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 14:54:49,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 14:54:49,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:49,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:49,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 14:54:49,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:49,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:49,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633183805] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:49,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:49,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 14:54:49,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990416313] [2025-02-05 14:54:49,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:49,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 14:54:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:49,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 14:54:49,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:54:49,763 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2025-02-05 14:54:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:49,803 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2025-02-05 14:54:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:54:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) Word has length 7 [2025-02-05 14:54:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:49,805 INFO L225 Difference]: With dead ends: 24 [2025-02-05 14:54:49,805 INFO L226 Difference]: Without dead ends: 17 [2025-02-05 14:54:49,805 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:54:49,806 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:49,806 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:54:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-02-05 14:54:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2025-02-05 14:54:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2025-02-05 14:54:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2025-02-05 14:54:49,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 7 [2025-02-05 14:54:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:49,811 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2025-02-05 14:54:49,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2025-02-05 14:54:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2025-02-05 14:54:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-05 14:54:49,812 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:49,812 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:49,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 14:54:50,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:50,017 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:50,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash 74988467, now seen corresponding path program 1 times [2025-02-05 14:54:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:50,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653108658] [2025-02-05 14:54:50,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:50,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:50,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-05 14:54:50,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 14:54:50,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:50,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:50,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:50,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653108658] [2025-02-05 14:54:50,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653108658] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:50,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019069658] [2025-02-05 14:54:50,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:50,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:50,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:50,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:50,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 14:54:50,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-05 14:54:50,155 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 14:54:50,155 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:50,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:50,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 14:54:50,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:50,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019069658] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:50,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-05 14:54:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999073851] [2025-02-05 14:54:50,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:50,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 14:54:50,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:50,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 14:54:50,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:54:50,207 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2025-02-05 14:54:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:50,242 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2025-02-05 14:54:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 14:54:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) Word has length 13 [2025-02-05 14:54:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:50,243 INFO L225 Difference]: With dead ends: 37 [2025-02-05 14:54:50,243 INFO L226 Difference]: Without dead ends: 28 [2025-02-05 14:54:50,243 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:54:50,244 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:50,244 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:54:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-05 14:54:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-02-05 14:54:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2025-02-05 14:54:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2025-02-05 14:54:50,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 13 [2025-02-05 14:54:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:50,247 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2025-02-05 14:54:50,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2025-02-05 14:54:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2025-02-05 14:54:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 14:54:50,248 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:50,248 INFO L218 NwaCegarLoop]: trace histogram [7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:50,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:50,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:50,452 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:50,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1978576098, now seen corresponding path program 1 times [2025-02-05 14:54:50,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:50,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128775179] [2025-02-05 14:54:50,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:50,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:54:50,531 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:54:50,531 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:50,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:54:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128775179] [2025-02-05 14:54:50,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128775179] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156776702] [2025-02-05 14:54:50,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:50,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:50,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:50,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:50,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 14:54:50,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:54:50,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:54:50,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:50,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:50,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 14:54:50,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:54:50,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:54:50,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156776702] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:50,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:50,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-02-05 14:54:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730119621] [2025-02-05 14:54:50,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:50,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 14:54:50,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:50,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 14:54:50,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:54:50,931 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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) [2025-02-05 14:54:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:50,996 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2025-02-05 14:54:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 14:54:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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) Word has length 27 [2025-02-05 14:54:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:51,000 INFO L225 Difference]: With dead ends: 58 [2025-02-05 14:54:51,000 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 14:54:51,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:54:51,014 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:51,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 14:54:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-05 14:54:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 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) [2025-02-05 14:54:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2025-02-05 14:54:51,079 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 27 [2025-02-05 14:54:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:51,081 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2025-02-05 14:54:51,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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) [2025-02-05 14:54:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2025-02-05 14:54:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 14:54:51,082 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:51,082 INFO L218 NwaCegarLoop]: trace histogram [12, 8, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:51,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 14:54:51,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:51,282 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:51,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2070418551, now seen corresponding path program 2 times [2025-02-05 14:54:51,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:51,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064876459] [2025-02-05 14:54:51,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:51,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:51,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 14:54:51,318 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:54:51,318 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:51,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:54:51,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064876459] [2025-02-05 14:54:51,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064876459] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978191709] [2025-02-05 14:54:51,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:51,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:51,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:51,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 14:54:51,581 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 14:54:51,614 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:54:51,615 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:51,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:51,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 14:54:51,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:54:51,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:54:51,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978191709] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:51,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:51,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2025-02-05 14:54:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920061360] [2025-02-05 14:54:51,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:51,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 14:54:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:51,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 14:54:51,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:54:51,912 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 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) [2025-02-05 14:54:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:51,979 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2025-02-05 14:54:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-05 14:54:51,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 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) Word has length 37 [2025-02-05 14:54:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:51,980 INFO L225 Difference]: With dead ends: 78 [2025-02-05 14:54:51,980 INFO L226 Difference]: Without dead ends: 58 [2025-02-05 14:54:51,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:54:51,981 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:51,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-05 14:54:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-02-05 14:54:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 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) [2025-02-05 14:54:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2025-02-05 14:54:51,990 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 37 [2025-02-05 14:54:51,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:51,990 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2025-02-05 14:54:51,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 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) [2025-02-05 14:54:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2025-02-05 14:54:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-05 14:54:51,991 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:51,991 INFO L218 NwaCegarLoop]: trace histogram [22, 18, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:52,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 14:54:52,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:52,192 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:52,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:52,192 INFO L85 PathProgramCache]: Analyzing trace with hash 69031273, now seen corresponding path program 3 times [2025-02-05 14:54:52,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:52,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727144043] [2025-02-05 14:54:52,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:52,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:52,209 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 57 statements into 23 equivalence classes. [2025-02-05 14:54:52,214 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 15 of 57 statements. [2025-02-05 14:54:52,214 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:54:52,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2025-02-05 14:54:52,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:52,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727144043] [2025-02-05 14:54:52,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727144043] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:52,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708734983] [2025-02-05 14:54:52,252 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:52,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:52,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:52,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:52,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 14:54:52,284 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 57 statements into 23 equivalence classes. [2025-02-05 14:54:52,290 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 15 of 57 statements. [2025-02-05 14:54:52,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:54:52,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:52,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 14:54:52,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2025-02-05 14:54:52,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2025-02-05 14:54:52,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708734983] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:52,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:52,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-02-05 14:54:52,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253237318] [2025-02-05 14:54:52,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:52,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 14:54:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:52,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 14:54:52,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:54:52,398 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2025-02-05 14:54:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:52,483 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2025-02-05 14:54:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:54:52,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) Word has length 57 [2025-02-05 14:54:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:52,487 INFO L225 Difference]: With dead ends: 73 [2025-02-05 14:54:52,488 INFO L226 Difference]: Without dead ends: 70 [2025-02-05 14:54:52,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:54:52,488 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:52,488 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-02-05 14:54:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-02-05 14:54:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.173913043478261) internal successors, (81), 69 states have internal predecessors, (81), 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) [2025-02-05 14:54:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2025-02-05 14:54:52,503 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 57 [2025-02-05 14:54:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:52,503 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2025-02-05 14:54:52,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2025-02-05 14:54:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2025-02-05 14:54:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-05 14:54:52,508 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:52,508 INFO L218 NwaCegarLoop]: trace histogram [25, 18, 7, 7, 4, 3, 1, 1, 1, 1, 1] [2025-02-05 14:54:52,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:52,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:52,709 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:52,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash -163539118, now seen corresponding path program 4 times [2025-02-05 14:54:52,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:52,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334900213] [2025-02-05 14:54:52,709 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:54:52,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:52,723 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-02-05 14:54:52,737 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-05 14:54:52,737 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:54:52,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 247 proven. 342 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 14:54:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334900213] [2025-02-05 14:54:53,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334900213] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:53,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153219407] [2025-02-05 14:54:53,138 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:54:53,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:53,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:53,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 14:54:53,184 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-02-05 14:54:53,205 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-05 14:54:53,205 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:54:53,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:53,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-05 14:54:53,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 247 proven. 342 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 14:54:53,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 247 proven. 342 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 14:54:53,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153219407] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:53,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:53,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2025-02-05 14:54:53,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241487290] [2025-02-05 14:54:53,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:53,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-05 14:54:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:53,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-05 14:54:53,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 14:54:53,770 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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) [2025-02-05 14:54:53,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:53,892 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2025-02-05 14:54:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-05 14:54:53,892 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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) Word has length 69 [2025-02-05 14:54:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:53,894 INFO L225 Difference]: With dead ends: 142 [2025-02-05 14:54:53,894 INFO L226 Difference]: Without dead ends: 110 [2025-02-05 14:54:53,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 14:54:53,896 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:53,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-02-05 14:54:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2025-02-05 14:54:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.110091743119266) internal successors, (121), 109 states have internal predecessors, (121), 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) [2025-02-05 14:54:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2025-02-05 14:54:53,908 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 69 [2025-02-05 14:54:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:53,909 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2025-02-05 14:54:53,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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) [2025-02-05 14:54:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2025-02-05 14:54:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-02-05 14:54:53,909 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:53,909 INFO L218 NwaCegarLoop]: trace histogram [45, 38, 7, 7, 4, 3, 1, 1, 1, 1, 1] [2025-02-05 14:54:53,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 14:54:54,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 14:54:54,110 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:54,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2047435722, now seen corresponding path program 5 times [2025-02-05 14:54:54,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:54,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115542138] [2025-02-05 14:54:54,111 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:54:54,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:54,122 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 109 statements into 46 equivalence classes. [2025-02-05 14:54:54,146 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) and asserted 86 of 109 statements. [2025-02-05 14:54:54,147 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2025-02-05 14:54:54,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2067 backedges. 622 proven. 21 refuted. 0 times theorem prover too weak. 1424 trivial. 0 not checked. [2025-02-05 14:54:54,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:54,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115542138] [2025-02-05 14:54:54,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115542138] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:54,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743588209] [2025-02-05 14:54:54,212 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:54:54,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:54,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:54,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 14:54:54,258 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 109 statements into 46 equivalence classes. [2025-02-05 14:54:54,295 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) and asserted 86 of 109 statements. [2025-02-05 14:54:54,295 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2025-02-05 14:54:54,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:54,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-05 14:54:54,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2067 backedges. 1192 proven. 351 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2025-02-05 14:54:54,498 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2067 backedges. 1192 proven. 351 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2025-02-05 14:54:55,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743588209] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:55,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:55,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 21, 21] total 40 [2025-02-05 14:54:55,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710987927] [2025-02-05 14:54:55,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:55,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-05 14:54:55,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:55,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-05 14:54:55,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 14:54:55,005 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 40 states, 40 states have (on average 2.85) internal successors, (114), 40 states have internal predecessors, (114), 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) [2025-02-05 14:54:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:55,238 INFO L93 Difference]: Finished difference Result 282 states and 374 transitions. [2025-02-05 14:54:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-05 14:54:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.85) internal successors, (114), 40 states have internal predecessors, (114), 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) Word has length 109 [2025-02-05 14:54:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:55,239 INFO L225 Difference]: With dead ends: 282 [2025-02-05 14:54:55,239 INFO L226 Difference]: Without dead ends: 250 [2025-02-05 14:54:55,243 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 14:54:55,243 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 139 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:55,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 54 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:54:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-02-05 14:54:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2025-02-05 14:54:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1887550200803212) internal successors, (296), 249 states have internal predecessors, (296), 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) [2025-02-05 14:54:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 296 transitions. [2025-02-05 14:54:55,261 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 296 transitions. Word has length 109 [2025-02-05 14:54:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:55,262 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 296 transitions. [2025-02-05 14:54:55,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.85) internal successors, (114), 40 states have internal predecessors, (114), 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) [2025-02-05 14:54:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 296 transitions. [2025-02-05 14:54:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2025-02-05 14:54:55,265 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:55,266 INFO L218 NwaCegarLoop]: trace histogram [80, 42, 42, 38, 38, 4, 1, 1, 1, 1, 1] [2025-02-05 14:54:55,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:55,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:55,470 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:55,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash 42491868, now seen corresponding path program 6 times [2025-02-05 14:54:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:55,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311837642] [2025-02-05 14:54:55,471 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:54:55,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:55,482 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 249 statements into 81 equivalence classes. [2025-02-05 14:54:55,489 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 63 of 249 statements. [2025-02-05 14:54:55,489 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-02-05 14:54:55,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8122 backedges. 1021 proven. 32 refuted. 0 times theorem prover too weak. 7069 trivial. 0 not checked. [2025-02-05 14:54:55,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:55,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311837642] [2025-02-05 14:54:55,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311837642] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:55,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868430202] [2025-02-05 14:54:55,550 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:54:55,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:55,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:55,552 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) [2025-02-05 14:54:55,553 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 [2025-02-05 14:54:55,601 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 249 statements into 81 equivalence classes. [2025-02-05 14:54:55,621 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 63 of 249 statements. [2025-02-05 14:54:55,621 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-02-05 14:54:55,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:55,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 14:54:55,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8122 backedges. 1021 proven. 32 refuted. 0 times theorem prover too weak. 7069 trivial. 0 not checked. [2025-02-05 14:54:55,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8122 backedges. 1021 proven. 32 refuted. 0 times theorem prover too weak. 7069 trivial. 0 not checked. [2025-02-05 14:54:55,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868430202] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:55,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:55,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-02-05 14:54:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569730251] [2025-02-05 14:54:55,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:55,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 14:54:55,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:55,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 14:54:55,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:54:55,722 INFO L87 Difference]: Start difference. First operand 250 states and 296 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2025-02-05 14:54:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:55,774 INFO L93 Difference]: Finished difference Result 277 states and 340 transitions. [2025-02-05 14:54:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 14:54:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) Word has length 249 [2025-02-05 14:54:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:55,780 INFO L225 Difference]: With dead ends: 277 [2025-02-05 14:54:55,780 INFO L226 Difference]: Without dead ends: 274 [2025-02-05 14:54:55,780 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:54:55,780 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:55,781 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:54:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-02-05 14:54:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2025-02-05 14:54:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.216117216117216) internal successors, (332), 273 states have internal predecessors, (332), 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) [2025-02-05 14:54:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 332 transitions. [2025-02-05 14:54:55,791 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 332 transitions. Word has length 249 [2025-02-05 14:54:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:55,792 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 332 transitions. [2025-02-05 14:54:55,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2025-02-05 14:54:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 332 transitions. [2025-02-05 14:54:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2025-02-05 14:54:55,794 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:55,794 INFO L218 NwaCegarLoop]: trace histogram [86, 48, 48, 38, 38, 10, 1, 1, 1, 1, 1] [2025-02-05 14:54:55,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:55,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:55,995 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:55,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:55,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1746213586, now seen corresponding path program 7 times [2025-02-05 14:54:55,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:55,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182288385] [2025-02-05 14:54:55,996 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:54:55,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:56,013 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 273 statements into 1 equivalence classes. [2025-02-05 14:54:56,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 273 of 273 statements. [2025-02-05 14:54:56,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:56,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9652 backedges. 3705 proven. 1482 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2025-02-05 14:54:58,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:58,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182288385] [2025-02-05 14:54:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182288385] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:58,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760287857] [2025-02-05 14:54:58,014 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:54:58,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:58,016 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) [2025-02-05 14:54:58,017 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 [2025-02-05 14:54:58,066 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 273 statements into 1 equivalence classes. [2025-02-05 14:54:58,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 273 of 273 statements. [2025-02-05 14:54:58,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:58,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:58,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 78 conjuncts are in the unsatisfiable core [2025-02-05 14:54:58,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9652 backedges. 3705 proven. 1482 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2025-02-05 14:54:58,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9652 backedges. 3705 proven. 1482 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2025-02-05 14:54:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760287857] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:59,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:59,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2025-02-05 14:54:59,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033027312] [2025-02-05 14:54:59,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:59,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2025-02-05 14:54:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:59,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2025-02-05 14:54:59,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2025-02-05 14:54:59,791 INFO L87 Difference]: Start difference. First operand 274 states and 332 transitions. Second operand has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) [2025-02-05 14:54:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:59,985 INFO L93 Difference]: Finished difference Result 550 states and 706 transitions. [2025-02-05 14:54:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2025-02-05 14:54:59,985 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) Word has length 273 [2025-02-05 14:54:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:59,986 INFO L225 Difference]: With dead ends: 550 [2025-02-05 14:54:59,986 INFO L226 Difference]: Without dead ends: 354 [2025-02-05 14:54:59,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2025-02-05 14:54:59,988 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:59,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:54:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2025-02-05 14:54:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2025-02-05 14:54:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.1671388101983002) internal successors, (412), 353 states have internal predecessors, (412), 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) [2025-02-05 14:54:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 412 transitions. [2025-02-05 14:54:59,997 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 412 transitions. Word has length 273 [2025-02-05 14:54:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:59,997 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 412 transitions. [2025-02-05 14:54:59,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) [2025-02-05 14:54:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 412 transitions. [2025-02-05 14:55:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2025-02-05 14:55:00,000 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:00,000 INFO L218 NwaCegarLoop]: trace histogram [126, 78, 48, 48, 38, 10, 1, 1, 1, 1, 1] [2025-02-05 14:55:00,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 14:55:00,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:00,201 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:00,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:00,201 INFO L85 PathProgramCache]: Analyzing trace with hash 110628598, now seen corresponding path program 8 times [2025-02-05 14:55:00,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:00,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399780904] [2025-02-05 14:55:00,201 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:55:00,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:00,216 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 353 statements into 2 equivalence classes. [2025-02-05 14:55:00,287 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 353 of 353 statements. [2025-02-05 14:55:00,288 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:55:00,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18132 backedges. 7505 proven. 6162 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2025-02-05 14:55:04,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399780904] [2025-02-05 14:55:04,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399780904] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627916668] [2025-02-05 14:55:04,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:55:04,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:04,592 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) [2025-02-05 14:55:04,593 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 [2025-02-05 14:55:04,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 353 statements into 2 equivalence classes. [2025-02-05 14:55:04,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 353 of 353 statements. [2025-02-05 14:55:04,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:55:04,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:04,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 158 conjuncts are in the unsatisfiable core [2025-02-05 14:55:04,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18132 backedges. 7505 proven. 6162 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2025-02-05 14:55:04,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18132 backedges. 7505 proven. 6162 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2025-02-05 14:55:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627916668] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:10,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:10,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 161 [2025-02-05 14:55:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379760986] [2025-02-05 14:55:10,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:10,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2025-02-05 14:55:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:10,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2025-02-05 14:55:10,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2025-02-05 14:55:10,662 INFO L87 Difference]: Start difference. First operand 354 states and 412 transitions. Second operand has 161 states, 161 states have (on average 2.049689440993789) internal successors, (330), 161 states have internal predecessors, (330), 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) [2025-02-05 14:55:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:11,078 INFO L93 Difference]: Finished difference Result 710 states and 906 transitions. [2025-02-05 14:55:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2025-02-05 14:55:11,079 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.049689440993789) internal successors, (330), 161 states have internal predecessors, (330), 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) Word has length 353 [2025-02-05 14:55:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:11,081 INFO L225 Difference]: With dead ends: 710 [2025-02-05 14:55:11,081 INFO L226 Difference]: Without dead ends: 514 [2025-02-05 14:55:11,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2025-02-05 14:55:11,085 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:11,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:55:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2025-02-05 14:55:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2025-02-05 14:55:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.115009746588694) internal successors, (572), 513 states have internal predecessors, (572), 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) [2025-02-05 14:55:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 572 transitions. [2025-02-05 14:55:11,097 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 572 transitions. Word has length 353 [2025-02-05 14:55:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:11,097 INFO L471 AbstractCegarLoop]: Abstraction has 514 states and 572 transitions. [2025-02-05 14:55:11,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.049689440993789) internal successors, (330), 161 states have internal predecessors, (330), 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) [2025-02-05 14:55:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 572 transitions. [2025-02-05 14:55:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2025-02-05 14:55:11,101 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:11,101 INFO L218 NwaCegarLoop]: trace histogram [206, 158, 48, 48, 38, 10, 1, 1, 1, 1, 1] [2025-02-05 14:55:11,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 14:55:11,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:11,305 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:11,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 482734726, now seen corresponding path program 9 times [2025-02-05 14:55:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:11,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514589435] [2025-02-05 14:55:11,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:55:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:11,326 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 513 statements into 207 equivalence classes. [2025-02-05 14:55:11,332 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) and asserted 69 of 513 statements. [2025-02-05 14:55:11,333 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2025-02-05 14:55:11,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44692 backedges. 4903 proven. 200 refuted. 0 times theorem prover too weak. 39589 trivial. 0 not checked. [2025-02-05 14:55:11,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:11,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514589435] [2025-02-05 14:55:11,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514589435] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:11,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894326791] [2025-02-05 14:55:11,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:55:11,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:11,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:11,432 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) [2025-02-05 14:55:11,436 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 [2025-02-05 14:55:11,516 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 513 statements into 207 equivalence classes. [2025-02-05 14:55:11,536 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) and asserted 69 of 513 statements. [2025-02-05 14:55:11,536 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2025-02-05 14:55:11,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:11,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-05 14:55:11,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 44692 backedges. 4903 proven. 200 refuted. 0 times theorem prover too weak. 39589 trivial. 0 not checked. [2025-02-05 14:55:11,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44692 backedges. 4903 proven. 200 refuted. 0 times theorem prover too weak. 39589 trivial. 0 not checked. [2025-02-05 14:55:11,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894326791] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:11,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:11,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2025-02-05 14:55:11,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585769603] [2025-02-05 14:55:11,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:11,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 14:55:11,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:11,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 14:55:11,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-02-05 14:55:11,743 INFO L87 Difference]: Start difference. First operand 514 states and 572 transitions. Second operand has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 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) [2025-02-05 14:55:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:11,865 INFO L93 Difference]: Finished difference Result 565 states and 658 transitions. [2025-02-05 14:55:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 14:55:11,866 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 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) Word has length 513 [2025-02-05 14:55:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:11,869 INFO L225 Difference]: With dead ends: 565 [2025-02-05 14:55:11,869 INFO L226 Difference]: Without dead ends: 562 [2025-02-05 14:55:11,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 1015 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-02-05 14:55:11,870 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:11,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:55:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2025-02-05 14:55:11,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2025-02-05 14:55:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 1.1479500891265597) internal successors, (644), 561 states have internal predecessors, (644), 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) [2025-02-05 14:55:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 644 transitions. [2025-02-05 14:55:11,883 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 644 transitions. Word has length 513 [2025-02-05 14:55:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:11,884 INFO L471 AbstractCegarLoop]: Abstraction has 562 states and 644 transitions. [2025-02-05 14:55:11,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 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) [2025-02-05 14:55:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 644 transitions. [2025-02-05 14:55:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2025-02-05 14:55:11,890 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:11,891 INFO L218 NwaCegarLoop]: trace histogram [218, 158, 60, 60, 38, 22, 1, 1, 1, 1, 1] [2025-02-05 14:55:11,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-05 14:55:12,091 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,SelfDestructingSolverStorable11 [2025-02-05 14:55:12,092 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:12,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:12,092 INFO L85 PathProgramCache]: Analyzing trace with hash 238611242, now seen corresponding path program 10 times [2025-02-05 14:55:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:12,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564917024] [2025-02-05 14:55:12,093 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:55:12,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:12,115 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 561 statements into 2 equivalence classes. [2025-02-05 14:55:12,240 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 561 of 561 statements. [2025-02-05 14:55:12,240 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:55:12,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 51064 backedges. 18921 proven. 25122 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2025-02-05 14:55:32,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564917024] [2025-02-05 14:55:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564917024] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561101461] [2025-02-05 14:55:32,197 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:55:32,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:32,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:32,199 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) [2025-02-05 14:55:32,201 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 [2025-02-05 14:55:32,304 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 561 statements into 2 equivalence classes. [2025-02-05 14:55:32,431 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 561 of 561 statements. [2025-02-05 14:55:32,432 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:55:32,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:32,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 318 conjuncts are in the unsatisfiable core [2025-02-05 14:55:32,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 51064 backedges. 18921 proven. 25122 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2025-02-05 14:55:32,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 51064 backedges. 18921 proven. 25122 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2025-02-05 14:55:55,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561101461] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:55,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:55,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161, 161] total 321 [2025-02-05 14:55:55,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246030329] [2025-02-05 14:55:55,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:55,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 321 states [2025-02-05 14:55:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:55,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 321 interpolants. [2025-02-05 14:55:55,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51360, Invalid=51360, Unknown=0, NotChecked=0, Total=102720 [2025-02-05 14:55:55,662 INFO L87 Difference]: Start difference. First operand 562 states and 644 transitions. Second operand has 321 states, 321 states have (on average 2.0249221183800623) internal successors, (650), 321 states have internal predecessors, (650), 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) [2025-02-05 14:55:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:57,478 INFO L93 Difference]: Finished difference Result 1126 states and 1450 transitions. [2025-02-05 14:55:57,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2025-02-05 14:55:57,479 INFO L78 Accepts]: Start accepts. Automaton has has 321 states, 321 states have (on average 2.0249221183800623) internal successors, (650), 321 states have internal predecessors, (650), 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) Word has length 561 [2025-02-05 14:55:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:57,485 INFO L225 Difference]: With dead ends: 1126 [2025-02-05 14:55:57,485 INFO L226 Difference]: Without dead ends: 882 [2025-02-05 14:55:57,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1281 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=51360, Invalid=51360, Unknown=0, NotChecked=0, Total=102720 [2025-02-05 14:55:57,494 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:57,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 14:55:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2025-02-05 14:55:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2025-02-05 14:55:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 1.094211123723042) internal successors, (964), 881 states have internal predecessors, (964), 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) [2025-02-05 14:55:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 964 transitions. [2025-02-05 14:55:57,518 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 964 transitions. Word has length 561 [2025-02-05 14:55:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:57,519 INFO L471 AbstractCegarLoop]: Abstraction has 882 states and 964 transitions. [2025-02-05 14:55:57,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 321 states, 321 states have (on average 2.0249221183800623) internal successors, (650), 321 states have internal predecessors, (650), 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) [2025-02-05 14:55:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 964 transitions. [2025-02-05 14:55:57,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2025-02-05 14:55:57,526 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:57,526 INFO L218 NwaCegarLoop]: trace histogram [378, 318, 60, 60, 38, 22, 1, 1, 1, 1, 1] [2025-02-05 14:55:57,534 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 [2025-02-05 14:55:57,730 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 [2025-02-05 14:55:57,730 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:57,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1103901258, now seen corresponding path program 11 times [2025-02-05 14:55:57,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:57,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861839458] [2025-02-05 14:55:57,731 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:55:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:57,785 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 881 statements into 379 equivalence classes. [2025-02-05 14:55:58,246 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 336 check-sat command(s) and asserted 750 of 881 statements. [2025-02-05 14:55:58,246 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 336 check-sat command(s) [2025-02-05 14:55:58,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 146424 backedges. 41810 proven. 2926 refuted. 0 times theorem prover too weak. 101688 trivial. 0 not checked. [2025-02-05 14:55:59,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:59,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861839458] [2025-02-05 14:55:59,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861839458] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:59,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689407849] [2025-02-05 14:55:59,747 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:55:59,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:59,749 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) [2025-02-05 14:55:59,750 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 [2025-02-05 14:55:59,958 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 881 statements into 379 equivalence classes. [2025-02-05 14:56:01,882 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 336 check-sat command(s) and asserted 750 of 881 statements. [2025-02-05 14:56:01,882 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 336 check-sat command(s) [2025-02-05 14:56:01,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:56:01,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 300 conjuncts are in the unsatisfiable core [2025-02-05 14:56:01,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:56:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 146424 backedges. 80510 proven. 29500 refuted. 0 times theorem prover too weak. 36414 trivial. 0 not checked. [2025-02-05 14:56:10,305 INFO L312 TraceCheckSpWp]: Computing backward predicates...