./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_15-1.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/recursive-simple/fibo_15-1.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 06a81e8bf3973396767cf6326af5dc9a5105a737c418064bf310f9765cc117f7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:56:03,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:56:03,748 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:56:03,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:56:03,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:56:03,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:56:03,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:56:03,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:56:03,825 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:56:03,825 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:56:03,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:56:03,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:56:03,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:56:03,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:56:03,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:56:03,827 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:56:03,828 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:56:03,828 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:56:03,828 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:56:03,829 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:56:03,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:56:03,829 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:56:03,829 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:56:03,829 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:56:03,829 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:56:03,829 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 -> 06a81e8bf3973396767cf6326af5dc9a5105a737c418064bf310f9765cc117f7 [2025-02-05 15:56:04,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:56:04,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:56:04,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:56:04,256 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:56:04,260 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:56:04,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_15-1.c [2025-02-05 15:56:06,294 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/eace7d967/27f85847fcbc456ca2467096f283ab25/FLAG4893214e4 [2025-02-05 15:56:06,771 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:56:06,773 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_15-1.c [2025-02-05 15:56:06,789 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/eace7d967/27f85847fcbc456ca2467096f283ab25/FLAG4893214e4 [2025-02-05 15:56:06,937 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/eace7d967/27f85847fcbc456ca2467096f283ab25 [2025-02-05 15:56:06,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:56:06,948 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:56:06,950 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:56:06,950 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:56:06,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:56:06,960 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:56:06" (1/1) ... [2025-02-05 15:56:06,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aef35af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:06, skipping insertion in model container [2025-02-05 15:56:06,966 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:56:06" (1/1) ... [2025-02-05 15:56:06,987 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:56:07,263 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/recursive-simple/fibo_15-1.c[744,757] [2025-02-05 15:56:07,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:56:07,288 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:56:07,312 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/recursive-simple/fibo_15-1.c[744,757] [2025-02-05 15:56:07,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:56:07,343 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:56:07,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07 WrapperNode [2025-02-05 15:56:07,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:56:07,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:56:07,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:56:07,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:56:07,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,409 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-02-05 15:56:07,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:56:07,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:56:07,410 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:56:07,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:56:07,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,429 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,452 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 15:56:07,453 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,457 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,463 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,464 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:56:07,472 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:56:07,472 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:56:07,472 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:56:07,473 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (1/1) ... [2025-02-05 15:56:07,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:56:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:07,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:56:07,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:56:07,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:56:07,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:56:07,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:56:07,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:56:07,602 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-02-05 15:56:07,602 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-02-05 15:56:07,694 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:56:07,696 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:56:07,908 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-02-05 15:56:07,924 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 15:56:07,925 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:56:07,943 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:56:07,948 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:56:07,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:56:07 BoogieIcfgContainer [2025-02-05 15:56:07,949 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:56:07,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:56:07,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:56:07,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:56:07,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:56:06" (1/3) ... [2025-02-05 15:56:07,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4ff1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:56:07, skipping insertion in model container [2025-02-05 15:56:07,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:56:07" (2/3) ... [2025-02-05 15:56:07,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4ff1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:56:07, skipping insertion in model container [2025-02-05 15:56:07,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:56:07" (3/3) ... [2025-02-05 15:56:07,969 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_15-1.c [2025-02-05 15:56:08,000 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:56:08,005 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_15-1.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 15:56:08,092 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:56:08,106 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;@3d1c369d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:56:08,108 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:56:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 15:56:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:56:08,122 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:08,122 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:08,123 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:08,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:08,129 INFO L85 PathProgramCache]: Analyzing trace with hash 402921910, now seen corresponding path program 1 times [2025-02-05 15:56:08,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:08,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425877152] [2025-02-05 15:56:08,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:08,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:56:08,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:56:08,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:08,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:56:08,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425877152] [2025-02-05 15:56:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425877152] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:56:08,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:56:08,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:56:08,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494701490] [2025-02-05 15:56:08,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:56:08,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:56:08,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:08,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:56:08,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:56:08,463 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:56:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:08,566 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-02-05 15:56:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:56:08,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-02-05 15:56:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:08,574 INFO L225 Difference]: With dead ends: 32 [2025-02-05 15:56:08,574 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 15:56:08,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:56:08,579 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:08,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 15:56:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-02-05 15:56:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:56:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-02-05 15:56:08,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2025-02-05 15:56:08,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:08,614 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-02-05 15:56:08,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:56:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-02-05 15:56:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 15:56:08,616 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:08,616 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:08,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:56:08,617 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:08,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2143228819, now seen corresponding path program 1 times [2025-02-05 15:56:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:08,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165560058] [2025-02-05 15:56:08,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:08,627 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 15:56:08,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 15:56:08,633 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:08,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:56:08,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:08,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165560058] [2025-02-05 15:56:08,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165560058] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:56:08,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:56:08,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:56:08,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932833977] [2025-02-05 15:56:08,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:56:08,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:56:08,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:08,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:56:08,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:56:08,720 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:56:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:08,789 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-02-05 15:56:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:56:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-02-05 15:56:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:08,791 INFO L225 Difference]: With dead ends: 24 [2025-02-05 15:56:08,791 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 15:56:08,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:56:08,793 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 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 15:56:08,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:08,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 15:56:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-02-05 15:56:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:56:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-02-05 15:56:08,800 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2025-02-05 15:56:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:08,800 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-02-05 15:56:08,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:56:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-02-05 15:56:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 15:56:08,804 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:08,804 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:08,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:56:08,805 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:08,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:08,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1857137997, now seen corresponding path program 1 times [2025-02-05 15:56:08,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:08,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353040714] [2025-02-05 15:56:08,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:08,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:08,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:56:08,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:56:08,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:08,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:56:08,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:08,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353040714] [2025-02-05 15:56:08,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353040714] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:08,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889387945] [2025-02-05 15:56:08,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:08,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:08,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:08,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:56:08,993 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:56:09,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:56:09,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:09,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:09,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:56:09,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:56:09,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:56:09,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889387945] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:09,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:09,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-02-05 15:56:09,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005839093] [2025-02-05 15:56:09,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:09,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:56:09,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:09,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:56:09,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:56:09,389 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:56:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:09,486 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-02-05 15:56:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:56:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-02-05 15:56:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:09,488 INFO L225 Difference]: With dead ends: 35 [2025-02-05 15:56:09,488 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 15:56:09,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:56:09,489 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:09,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 15:56:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-05 15:56:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 15:56:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-02-05 15:56:09,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2025-02-05 15:56:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:09,494 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-02-05 15:56:09,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:56:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-02-05 15:56:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 15:56:09,496 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:09,496 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:09,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 15:56:09,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:09,700 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:09,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash -318077138, now seen corresponding path program 1 times [2025-02-05 15:56:09,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:09,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476855351] [2025-02-05 15:56:09,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:09,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:09,707 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:56:09,723 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:56:09,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:09,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:56:09,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:09,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476855351] [2025-02-05 15:56:09,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476855351] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:09,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396969595] [2025-02-05 15:56:09,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:56:09,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:09,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:09,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:09,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:56:09,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:56:09,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:56:09,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:09,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:09,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:56:09,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:56:09,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:56:10,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396969595] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:10,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:10,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-02-05 15:56:10,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622990319] [2025-02-05 15:56:10,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:10,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 15:56:10,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:10,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 15:56:10,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:56:10,262 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:56:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:10,345 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-02-05 15:56:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:56:10,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-02-05 15:56:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:10,348 INFO L225 Difference]: With dead ends: 29 [2025-02-05 15:56:10,349 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 15:56:10,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:56:10,351 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:10,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 15:56:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-05 15:56:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 15:56:10,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-02-05 15:56:10,359 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2025-02-05 15:56:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:10,360 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-02-05 15:56:10,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:56:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-02-05 15:56:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 15:56:10,361 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:10,361 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:10,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 15:56:10,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:10,562 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:10,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash -896080901, now seen corresponding path program 2 times [2025-02-05 15:56:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:10,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734776920] [2025-02-05 15:56:10,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:10,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:10,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 15:56:10,606 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:56:10,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:10,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 15:56:10,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734776920] [2025-02-05 15:56:10,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734776920] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035093191] [2025-02-05 15:56:10,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:10,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:10,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:10,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:10,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:56:10,907 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 15:56:10,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:56:10,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:10,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:10,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:56:10,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-05 15:56:11,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 15:56:11,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035093191] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:11,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:11,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2025-02-05 15:56:11,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085960654] [2025-02-05 15:56:11,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:11,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:56:11,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:11,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:56:11,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:56:11,453 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-05 15:56:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:11,708 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2025-02-05 15:56:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:56:11,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2025-02-05 15:56:11,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:11,712 INFO L225 Difference]: With dead ends: 60 [2025-02-05 15:56:11,712 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 15:56:11,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:56:11,713 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:11,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 15:56:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-05 15:56:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-02-05 15:56:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2025-02-05 15:56:11,725 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2025-02-05 15:56:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:11,725 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2025-02-05 15:56:11,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-05 15:56:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2025-02-05 15:56:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-02-05 15:56:11,731 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:11,731 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:11,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 15:56:11,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:11,936 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:11,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1467785241, now seen corresponding path program 3 times [2025-02-05 15:56:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:11,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048835021] [2025-02-05 15:56:11,937 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:56:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:11,963 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-02-05 15:56:11,994 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-02-05 15:56:11,994 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 15:56:11,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-02-05 15:56:12,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:12,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048835021] [2025-02-05 15:56:12,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048835021] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:12,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703040741] [2025-02-05 15:56:12,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:56:12,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:12,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:12,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:12,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:56:12,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-02-05 15:56:12,177 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-02-05 15:56:12,177 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 15:56:12,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:12,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:56:12,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-02-05 15:56:12,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-02-05 15:56:12,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703040741] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:12,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:12,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-02-05 15:56:12,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433989558] [2025-02-05 15:56:12,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:12,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:56:12,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:12,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:56:12,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:56:12,690 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 15:56:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:12,814 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2025-02-05 15:56:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:56:12,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2025-02-05 15:56:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:12,817 INFO L225 Difference]: With dead ends: 72 [2025-02-05 15:56:12,817 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 15:56:12,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:56:12,818 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:12,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 15:56:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-02-05 15:56:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2025-02-05 15:56:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-02-05 15:56:12,830 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 93 [2025-02-05 15:56:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:12,830 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-02-05 15:56:12,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 15:56:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-02-05 15:56:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-02-05 15:56:12,831 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:12,831 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:12,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 15:56:13,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 15:56:13,032 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:13,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1566632231, now seen corresponding path program 4 times [2025-02-05 15:56:13,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:13,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772206234] [2025-02-05 15:56:13,033 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:56:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:13,046 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 79 statements into 2 equivalence classes. [2025-02-05 15:56:13,053 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 65 of 79 statements. [2025-02-05 15:56:13,054 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:56:13,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 121 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2025-02-05 15:56:13,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772206234] [2025-02-05 15:56:13,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772206234] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424126306] [2025-02-05 15:56:13,369 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:56:13,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:13,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:13,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:56:13,417 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 79 statements into 2 equivalence classes. [2025-02-05 15:56:13,438 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 65 of 79 statements. [2025-02-05 15:56:13,439 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:56:13,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:13,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:56:13,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 122 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-02-05 15:56:13,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 134 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-02-05 15:56:14,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424126306] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:14,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:14,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-02-05 15:56:14,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190555690] [2025-02-05 15:56:14,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:14,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:56:14,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:14,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:56:14,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:56:14,544 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2025-02-05 15:56:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:14,813 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2025-02-05 15:56:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:56:14,813 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 79 [2025-02-05 15:56:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:14,815 INFO L225 Difference]: With dead ends: 86 [2025-02-05 15:56:14,815 INFO L226 Difference]: Without dead ends: 52 [2025-02-05 15:56:14,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:56:14,817 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:14,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 98 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-05 15:56:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2025-02-05 15:56:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2025-02-05 15:56:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2025-02-05 15:56:14,824 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 79 [2025-02-05 15:56:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:14,825 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2025-02-05 15:56:14,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2025-02-05 15:56:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2025-02-05 15:56:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-02-05 15:56:14,826 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:14,826 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:14,836 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 15:56:15,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:15,030 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:15,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash 152396661, now seen corresponding path program 5 times [2025-02-05 15:56:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:15,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191188313] [2025-02-05 15:56:15,030 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:56:15,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:15,040 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 8 equivalence classes. [2025-02-05 15:56:15,059 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 15:56:15,060 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-05 15:56:15,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 39 proven. 57 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-05 15:56:15,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:15,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191188313] [2025-02-05 15:56:15,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191188313] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:15,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055441125] [2025-02-05 15:56:15,142 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:56:15,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:15,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:15,145 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:15,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:56:15,195 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 8 equivalence classes. [2025-02-05 15:56:15,221 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 15:56:15,221 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-05 15:56:15,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:15,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:56:15,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2025-02-05 15:56:15,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-05 15:56:15,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055441125] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:15,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:15,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 12 [2025-02-05 15:56:15,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090201124] [2025-02-05 15:56:15,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:15,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:56:15,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:15,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:56:15,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:56:15,627 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-05 15:56:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:15,806 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2025-02-05 15:56:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:56:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 65 [2025-02-05 15:56:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:15,808 INFO L225 Difference]: With dead ends: 51 [2025-02-05 15:56:15,808 INFO L226 Difference]: Without dead ends: 47 [2025-02-05 15:56:15,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:56:15,809 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:15,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-05 15:56:15,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2025-02-05 15:56:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-05 15:56:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2025-02-05 15:56:15,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 65 [2025-02-05 15:56:15,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:15,818 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2025-02-05 15:56:15,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-05 15:56:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2025-02-05 15:56:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-02-05 15:56:15,820 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:15,820 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:15,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 15:56:16,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 15:56:16,023 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:16,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:16,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1813016480, now seen corresponding path program 6 times [2025-02-05 15:56:16,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:16,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162083674] [2025-02-05 15:56:16,023 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:56:16,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:16,040 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 13 equivalence classes. [2025-02-05 15:56:16,075 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 92 of 106 statements. [2025-02-05 15:56:16,075 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-02-05 15:56:16,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 45 proven. 223 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2025-02-05 15:56:16,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162083674] [2025-02-05 15:56:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162083674] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877684381] [2025-02-05 15:56:16,233 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:56:16,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:16,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:16,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:56:16,275 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 13 equivalence classes. [2025-02-05 15:56:16,303 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 92 of 106 statements. [2025-02-05 15:56:16,303 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-02-05 15:56:16,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:16,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:56:16,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2025-02-05 15:56:16,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2025-02-05 15:56:17,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877684381] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:17,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:17,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2025-02-05 15:56:17,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032956243] [2025-02-05 15:56:17,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:17,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:56:17,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:17,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:56:17,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:56:17,354 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:56:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:17,529 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2025-02-05 15:56:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:56:17,529 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) Word has length 106 [2025-02-05 15:56:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:17,531 INFO L225 Difference]: With dead ends: 59 [2025-02-05 15:56:17,531 INFO L226 Difference]: Without dead ends: 55 [2025-02-05 15:56:17,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:56:17,532 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:17,532 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 81 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-05 15:56:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2025-02-05 15:56:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (21), 11 states have call predecessors, (21), 8 states have call successors, (21) [2025-02-05 15:56:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2025-02-05 15:56:17,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 106 [2025-02-05 15:56:17,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:17,543 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2025-02-05 15:56:17,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:56:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2025-02-05 15:56:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2025-02-05 15:56:17,545 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:17,545 INFO L218 NwaCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:17,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 15:56:17,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:17,746 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:17,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:17,747 INFO L85 PathProgramCache]: Analyzing trace with hash 779620497, now seen corresponding path program 7 times [2025-02-05 15:56:17,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:17,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15539743] [2025-02-05 15:56:17,748 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:56:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:17,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 201 statements into 1 equivalence classes. [2025-02-05 15:56:17,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 201 of 201 statements. [2025-02-05 15:56:17,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:17,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2025-02-05 15:56:18,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:18,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15539743] [2025-02-05 15:56:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15539743] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102243397] [2025-02-05 15:56:18,215 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:56:18,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:18,219 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 15:56:18,220 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 15:56:18,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 201 statements into 1 equivalence classes. [2025-02-05 15:56:18,335 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 201 of 201 statements. [2025-02-05 15:56:18,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:18,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:18,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:56:18,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2025-02-05 15:56:18,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 693 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2025-02-05 15:56:20,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102243397] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:20,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:20,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2025-02-05 15:56:20,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395323] [2025-02-05 15:56:20,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:20,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:56:20,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:20,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:56:20,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:56:20,091 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-02-05 15:56:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:20,251 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2025-02-05 15:56:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:56:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 201 [2025-02-05 15:56:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:20,253 INFO L225 Difference]: With dead ends: 61 [2025-02-05 15:56:20,253 INFO L226 Difference]: Without dead ends: 57 [2025-02-05 15:56:20,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 394 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:56:20,256 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:20,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 86 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-02-05 15:56:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2025-02-05 15:56:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2025-02-05 15:56:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2025-02-05 15:56:20,266 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 201 [2025-02-05 15:56:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:20,270 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2025-02-05 15:56:20,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-02-05 15:56:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2025-02-05 15:56:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2025-02-05 15:56:20,275 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:20,275 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:20,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 15:56:20,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:20,476 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:20,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1955485102, now seen corresponding path program 8 times [2025-02-05 15:56:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:20,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7636420] [2025-02-05 15:56:20,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:20,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 324 statements into 2 equivalence classes. [2025-02-05 15:56:20,533 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 324 of 324 statements. [2025-02-05 15:56:20,533 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:20,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1327 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2025-02-05 15:56:20,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:20,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7636420] [2025-02-05 15:56:20,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7636420] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:20,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554302418] [2025-02-05 15:56:20,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:20,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:20,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:20,972 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 15:56:20,973 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 15:56:21,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 324 statements into 2 equivalence classes. [2025-02-05 15:56:21,127 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 324 of 324 statements. [2025-02-05 15:56:21,128 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:21,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:21,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:56:21,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1327 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2025-02-05 15:56:21,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1384 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2025-02-05 15:56:23,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554302418] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:23,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:23,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2025-02-05 15:56:23,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159698341] [2025-02-05 15:56:23,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:23,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 15:56:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:23,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 15:56:23,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:56:23,303 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-02-05 15:56:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:23,488 INFO L93 Difference]: Finished difference Result 66 states and 99 transitions. [2025-02-05 15:56:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:56:23,488 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 324 [2025-02-05 15:56:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:23,490 INFO L225 Difference]: With dead ends: 66 [2025-02-05 15:56:23,490 INFO L226 Difference]: Without dead ends: 62 [2025-02-05 15:56:23,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 639 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:56:23,491 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:23,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 82 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-05 15:56:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2025-02-05 15:56:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (41), 15 states have call predecessors, (41), 10 states have call successors, (41) [2025-02-05 15:56:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2025-02-05 15:56:23,506 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 324 [2025-02-05 15:56:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:23,506 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2025-02-05 15:56:23,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-02-05 15:56:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2025-02-05 15:56:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2025-02-05 15:56:23,517 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:23,518 INFO L218 NwaCegarLoop]: trace histogram [95, 95, 77, 47, 47, 47, 47, 47, 47, 47, 30, 18, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:23,526 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 15:56:23,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:23,719 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:23,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash -342890189, now seen corresponding path program 9 times [2025-02-05 15:56:23,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:23,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748826622] [2025-02-05 15:56:23,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:56:23,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:23,738 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 651 statements into 82 equivalence classes. [2025-02-05 15:56:23,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 245 of 651 statements. [2025-02-05 15:56:23,794 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-02-05 15:56:23,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 529 proven. 3350 refuted. 0 times theorem prover too weak. 21231 trivial. 0 not checked. [2025-02-05 15:56:24,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:24,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748826622] [2025-02-05 15:56:24,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748826622] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:24,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220142580] [2025-02-05 15:56:24,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:56:24,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:24,155 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 15:56:24,157 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 15:56:24,342 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 651 statements into 82 equivalence classes. [2025-02-05 15:56:24,442 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 245 of 651 statements. [2025-02-05 15:56:24,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-02-05 15:56:24,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:24,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 15:56:24,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 529 proven. 3350 refuted. 0 times theorem prover too weak. 21231 trivial. 0 not checked. [2025-02-05 15:56:24,627 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 529 proven. 3427 refuted. 0 times theorem prover too weak. 21154 trivial. 0 not checked. [2025-02-05 15:56:28,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220142580] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:28,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:28,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-02-05 15:56:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693177662] [2025-02-05 15:56:28,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:28,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:56:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:28,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:56:28,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:56:28,380 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-02-05 15:56:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:28,839 INFO L93 Difference]: Finished difference Result 71 states and 116 transitions. [2025-02-05 15:56:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:56:28,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 651 [2025-02-05 15:56:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:28,843 INFO L225 Difference]: With dead ends: 71 [2025-02-05 15:56:28,844 INFO L226 Difference]: Without dead ends: 67 [2025-02-05 15:56:28,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1326 GetRequests, 1292 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-02-05 15:56:28,845 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:28,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 85 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:56:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-05 15:56:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2025-02-05 15:56:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (54), 17 states have call predecessors, (54), 11 states have call successors, (54) [2025-02-05 15:56:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 112 transitions. [2025-02-05 15:56:28,859 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 112 transitions. Word has length 651 [2025-02-05 15:56:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:28,863 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 112 transitions. [2025-02-05 15:56:28,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-02-05 15:56:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 112 transitions. [2025-02-05 15:56:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2025-02-05 15:56:28,872 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:28,873 INFO L218 NwaCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:28,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 15:56:29,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 15:56:29,074 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:29,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:29,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1898637249, now seen corresponding path program 10 times [2025-02-05 15:56:29,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:29,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548927655] [2025-02-05 15:56:29,074 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:56:29,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:29,111 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1059 statements into 2 equivalence classes. [2025-02-05 15:56:29,261 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 901 of 1059 statements. [2025-02-05 15:56:29,261 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:56:29,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 1659 proven. 8005 refuted. 0 times theorem prover too weak. 57530 trivial. 0 not checked. [2025-02-05 15:56:30,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:30,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548927655] [2025-02-05 15:56:30,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548927655] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726320824] [2025-02-05 15:56:30,677 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:56:30,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:30,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:30,679 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 15:56:30,681 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 15:56:30,854 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1059 statements into 2 equivalence classes. [2025-02-05 15:56:31,039 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 901 of 1059 statements. [2025-02-05 15:56:31,039 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:56:31,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:31,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 1882 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 15:56:31,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 30988 proven. 1855 refuted. 0 times theorem prover too weak. 34351 trivial. 0 not checked. [2025-02-05 15:56:31,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 1831 proven. 9217 refuted. 0 times theorem prover too weak. 56146 trivial. 0 not checked. [2025-02-05 15:56:37,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726320824] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:37,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:37,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 32 [2025-02-05 15:56:37,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642328691] [2025-02-05 15:56:37,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:37,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 15:56:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:37,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 15:56:37,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:56:37,703 INFO L87 Difference]: Start difference. First operand 67 states and 112 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) [2025-02-05 15:56:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:38,484 INFO L93 Difference]: Finished difference Result 169 states and 376 transitions. [2025-02-05 15:56:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 15:56:38,485 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) Word has length 1059 [2025-02-05 15:56:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:38,488 INFO L225 Difference]: With dead ends: 169 [2025-02-05 15:56:38,488 INFO L226 Difference]: Without dead ends: 108 [2025-02-05 15:56:38,490 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2167 GetRequests, 2098 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=824, Invalid=2482, Unknown=0, NotChecked=0, Total=3306 [2025-02-05 15:56:38,491 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 222 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:38,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 167 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 15:56:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-02-05 15:56:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2025-02-05 15:56:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 67 states have internal predecessors, (71), 18 states have call successors, (18), 13 states have call predecessors, (18), 10 states have return successors, (53), 17 states have call predecessors, (53), 18 states have call successors, (53) [2025-02-05 15:56:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-02-05 15:56:38,513 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 1059 [2025-02-05 15:56:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:38,513 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-02-05 15:56:38,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) [2025-02-05 15:56:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-02-05 15:56:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2025-02-05 15:56:38,521 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:38,522 INFO L218 NwaCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:38,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 15:56:38,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 15:56:38,725 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:38,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash -270648849, now seen corresponding path program 11 times [2025-02-05 15:56:38,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:38,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686999643] [2025-02-05 15:56:38,726 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:56:38,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:38,752 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 923 statements into 116 equivalence classes. [2025-02-05 15:56:38,900 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) and asserted 625 of 923 statements. [2025-02-05 15:56:38,900 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2025-02-05 15:56:38,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 5391 proven. 2328 refuted. 0 times theorem prover too weak. 43191 trivial. 0 not checked. [2025-02-05 15:56:39,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686999643] [2025-02-05 15:56:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686999643] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412944075] [2025-02-05 15:56:39,598 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:56:39,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:39,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:39,601 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 15:56:39,602 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 15:56:39,834 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 923 statements into 116 equivalence classes. [2025-02-05 15:56:40,098 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) and asserted 625 of 923 statements. [2025-02-05 15:56:40,098 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2025-02-05 15:56:40,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:40,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:56:40,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 22448 proven. 729 refuted. 0 times theorem prover too weak. 27733 trivial. 0 not checked. [2025-02-05 15:56:40,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 5397 proven. 2359 refuted. 0 times theorem prover too weak. 43154 trivial. 0 not checked. [2025-02-05 15:56:43,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412944075] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:43,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:43,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 23 [2025-02-05 15:56:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404240481] [2025-02-05 15:56:43,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:43,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:56:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:43,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:56:43,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:56:43,936 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 18 states have call successors, (24), 2 states have call predecessors, (24), 11 states have return successors, (32), 12 states have call predecessors, (32), 18 states have call successors, (32) [2025-02-05 15:56:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:44,234 INFO L93 Difference]: Finished difference Result 210 states and 333 transitions. [2025-02-05 15:56:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:56:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 18 states have call successors, (24), 2 states have call predecessors, (24), 11 states have return successors, (32), 12 states have call predecessors, (32), 18 states have call successors, (32) Word has length 923 [2025-02-05 15:56:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:44,238 INFO L225 Difference]: With dead ends: 210 [2025-02-05 15:56:44,238 INFO L226 Difference]: Without dead ends: 115 [2025-02-05 15:56:44,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1880 GetRequests, 1834 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 15:56:44,239 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 84 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:44,239 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 175 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:56:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-02-05 15:56:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2025-02-05 15:56:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 70 states have internal predecessors, (74), 19 states have call successors, (19), 14 states have call predecessors, (19), 10 states have return successors, (53), 17 states have call predecessors, (53), 19 states have call successors, (53) [2025-02-05 15:56:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 146 transitions. [2025-02-05 15:56:44,255 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 146 transitions. Word has length 923 [2025-02-05 15:56:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:44,256 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 146 transitions. [2025-02-05 15:56:44,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 18 states have call successors, (24), 2 states have call predecessors, (24), 11 states have return successors, (32), 12 states have call predecessors, (32), 18 states have call successors, (32) [2025-02-05 15:56:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 146 transitions. [2025-02-05 15:56:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2025-02-05 15:56:44,260 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:44,260 INFO L218 NwaCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:44,271 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 15:56:44,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:44,464 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:44,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:44,465 INFO L85 PathProgramCache]: Analyzing trace with hash -671802956, now seen corresponding path program 12 times [2025-02-05 15:56:44,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:44,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429207486] [2025-02-05 15:56:44,465 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:56:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:44,483 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 746 statements into 93 equivalence classes. [2025-02-05 15:56:44,505 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 239 of 746 statements. [2025-02-05 15:56:44,505 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-02-05 15:56:44,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 1298 proven. 3201 refuted. 0 times theorem prover too weak. 28597 trivial. 0 not checked. [2025-02-05 15:56:44,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429207486] [2025-02-05 15:56:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429207486] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051234699] [2025-02-05 15:56:44,748 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:56:44,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:44,750 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 15:56:44,752 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 15:56:44,965 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 746 statements into 93 equivalence classes. [2025-02-05 15:56:45,027 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 239 of 746 statements. [2025-02-05 15:56:45,027 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-02-05 15:56:45,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:45,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 15:56:45,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 1298 proven. 3201 refuted. 0 times theorem prover too weak. 28597 trivial. 0 not checked. [2025-02-05 15:56:45,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 1306 proven. 3270 refuted. 0 times theorem prover too weak. 28520 trivial. 0 not checked. [2025-02-05 15:56:48,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051234699] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:48,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:48,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-02-05 15:56:48,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748144864] [2025-02-05 15:56:48,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:48,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:56:48,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:48,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:56:48,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:56:48,114 INFO L87 Difference]: Start difference. First operand 102 states and 146 transitions. Second operand has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-02-05 15:56:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:48,259 INFO L93 Difference]: Finished difference Result 114 states and 175 transitions. [2025-02-05 15:56:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:56:48,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 746 [2025-02-05 15:56:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:48,262 INFO L225 Difference]: With dead ends: 114 [2025-02-05 15:56:48,262 INFO L226 Difference]: Without dead ends: 110 [2025-02-05 15:56:48,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1516 GetRequests, 1482 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-02-05 15:56:48,263 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:48,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 90 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:56:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-02-05 15:56:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2025-02-05 15:56:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 73 states have internal predecessors, (77), 20 states have call successors, (20), 14 states have call predecessors, (20), 11 states have return successors, (65), 19 states have call predecessors, (65), 20 states have call successors, (65) [2025-02-05 15:56:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 162 transitions. [2025-02-05 15:56:48,276 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 162 transitions. Word has length 746 [2025-02-05 15:56:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:48,277 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 162 transitions. [2025-02-05 15:56:48,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-02-05 15:56:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 162 transitions. [2025-02-05 15:56:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2025-02-05 15:56:48,302 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:48,302 INFO L218 NwaCegarLoop]: trace histogram [187, 187, 151, 93, 93, 93, 93, 93, 93, 93, 58, 36, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:48,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-05 15:56:48,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:48,503 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:48,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1926056489, now seen corresponding path program 13 times [2025-02-05 15:56:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:48,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485127609] [2025-02-05 15:56:48,504 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:56:48,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:48,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1277 statements into 1 equivalence classes. [2025-02-05 15:56:48,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1277 of 1277 statements. [2025-02-05 15:56:48,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:48,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 3051 proven. 10112 refuted. 0 times theorem prover too weak. 84838 trivial. 0 not checked. [2025-02-05 15:56:50,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:56:50,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485127609] [2025-02-05 15:56:50,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485127609] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:56:50,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718077062] [2025-02-05 15:56:50,714 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:56:50,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:56:50,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:56:50,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:56:50,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 15:56:50,967 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1277 statements into 1 equivalence classes. [2025-02-05 15:56:51,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1277 of 1277 statements. [2025-02-05 15:56:51,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:56:51,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:56:51,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 15:56:51,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:56:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 1133 proven. 8809 refuted. 0 times theorem prover too weak. 88059 trivial. 0 not checked. [2025-02-05 15:56:51,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:56:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 1133 proven. 8935 refuted. 0 times theorem prover too weak. 87933 trivial. 0 not checked. [2025-02-05 15:56:57,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718077062] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:56:57,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:56:57,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 23] total 37 [2025-02-05 15:56:57,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098163908] [2025-02-05 15:56:57,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:56:57,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-05 15:56:57,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:56:57,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-05 15:56:57,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 15:56:57,518 INFO L87 Difference]: Start difference. First operand 107 states and 162 transitions. Second operand has 37 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 37 states have internal predecessors, (109), 32 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (52), 21 states have call predecessors, (52), 32 states have call successors, (52) [2025-02-05 15:56:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:56:58,340 INFO L93 Difference]: Finished difference Result 303 states and 684 transitions. [2025-02-05 15:56:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-02-05 15:56:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 37 states have internal predecessors, (109), 32 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (52), 21 states have call predecessors, (52), 32 states have call successors, (52) Word has length 1277 [2025-02-05 15:56:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:56:58,345 INFO L225 Difference]: With dead ends: 303 [2025-02-05 15:56:58,345 INFO L226 Difference]: Without dead ends: 202 [2025-02-05 15:56:58,348 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2622 GetRequests, 2536 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1330, Invalid=4676, Unknown=0, NotChecked=0, Total=6006 [2025-02-05 15:56:58,349 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 222 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 15:56:58,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 302 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 15:56:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-02-05 15:56:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2025-02-05 15:56:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 112 states have internal predecessors, (116), 33 states have call successors, (33), 26 states have call predecessors, (33), 12 states have return successors, (99), 21 states have call predecessors, (99), 33 states have call successors, (99) [2025-02-05 15:56:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2025-02-05 15:56:58,367 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 1277 [2025-02-05 15:56:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:56:58,368 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2025-02-05 15:56:58,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 37 states have internal predecessors, (109), 32 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (52), 21 states have call predecessors, (52), 32 states have call successors, (52) [2025-02-05 15:56:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2025-02-05 15:56:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2245 [2025-02-05 15:56:58,397 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:56:58,398 INFO L218 NwaCegarLoop]: trace histogram [329, 329, 266, 164, 164, 164, 164, 164, 164, 164, 102, 63, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:56:58,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 15:56:58,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 15:56:58,598 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:56:58,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:56:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2029624670, now seen corresponding path program 14 times [2025-02-05 15:56:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:56:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018955967] [2025-02-05 15:56:58,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:56:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:56:58,646 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2244 statements into 2 equivalence classes. [2025-02-05 15:56:59,034 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2244 of 2244 statements. [2025-02-05 15:56:59,034 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:56:59,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 304533 backedges. 2112 proven. 17592 refuted. 0 times theorem prover too weak. 284829 trivial. 0 not checked. [2025-02-05 15:57:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018955967] [2025-02-05 15:57:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018955967] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520581425] [2025-02-05 15:57:02,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:02,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:02,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:02,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 15:57:02,814 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2244 statements into 2 equivalence classes. [2025-02-05 15:57:03,283 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2244 of 2244 statements. [2025-02-05 15:57:03,283 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:03,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:03,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 5001 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 15:57:03,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 304533 backedges. 2112 proven. 17592 refuted. 0 times theorem prover too weak. 284829 trivial. 0 not checked. [2025-02-05 15:57:03,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 304533 backedges. 2112 proven. 17747 refuted. 0 times theorem prover too weak. 284674 trivial. 0 not checked. [2025-02-05 15:57:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520581425] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:12,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:12,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2025-02-05 15:57:12,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160064166] [2025-02-05 15:57:12,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:12,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 15:57:12,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:12,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 15:57:12,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:57:12,707 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-02-05 15:57:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:12,972 INFO L93 Difference]: Finished difference Result 169 states and 273 transitions. [2025-02-05 15:57:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:57:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 2244 [2025-02-05 15:57:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:12,978 INFO L225 Difference]: With dead ends: 169 [2025-02-05 15:57:12,978 INFO L226 Difference]: Without dead ends: 165 [2025-02-05 15:57:12,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4521 GetRequests, 4475 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 15:57:12,980 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 219 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:12,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 126 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:57:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2025-02-05 15:57:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2025-02-05 15:57:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 states have internal predecessors, (119), 34 states have call successors, (34), 26 states have call predecessors, (34), 13 states have return successors, (112), 23 states have call predecessors, (112), 34 states have call successors, (112) [2025-02-05 15:57:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 265 transitions. [2025-02-05 15:57:12,999 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 265 transitions. Word has length 2244 [2025-02-05 15:57:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:13,000 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 265 transitions. [2025-02-05 15:57:13,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-02-05 15:57:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 265 transitions. [2025-02-05 15:57:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3457 [2025-02-05 15:57:13,057 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:13,058 INFO L218 NwaCegarLoop]: trace histogram [507, 507, 410, 253, 253, 253, 253, 253, 253, 253, 157, 97, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:13,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-05 15:57:13,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 15:57:13,258 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:13,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:13,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2141338936, now seen corresponding path program 15 times [2025-02-05 15:57:13,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:13,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806872094] [2025-02-05 15:57:13,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:13,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:13,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 3456 statements into 427 equivalence classes. [2025-02-05 15:57:13,411 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) and asserted 403 of 3456 statements. [2025-02-05 15:57:13,411 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2025-02-05 15:57:13,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 724441 backedges. 3505 proven. 30036 refuted. 0 times theorem prover too weak. 690900 trivial. 0 not checked. [2025-02-05 15:57:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:13,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806872094] [2025-02-05 15:57:13,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806872094] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:13,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986700828] [2025-02-05 15:57:13,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:13,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:13,876 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:13,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 15:57:14,349 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 3456 statements into 427 equivalence classes. [2025-02-05 15:57:14,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) and asserted 403 of 3456 statements. [2025-02-05 15:57:14,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2025-02-05 15:57:14,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:14,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 15:57:14,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 724441 backedges. 3505 proven. 30036 refuted. 0 times theorem prover too weak. 690900 trivial. 0 not checked. [2025-02-05 15:57:14,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 724441 backedges. 3505 proven. 30223 refuted. 0 times theorem prover too weak. 690713 trivial. 0 not checked. [2025-02-05 15:57:28,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986700828] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:28,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:28,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2025-02-05 15:57:28,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788101166] [2025-02-05 15:57:28,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:28,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 15:57:28,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:28,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 15:57:28,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2025-02-05 15:57:28,739 INFO L87 Difference]: Start difference. First operand 165 states and 265 transitions. Second operand has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2025-02-05 15:57:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:28,969 INFO L93 Difference]: Finished difference Result 174 states and 292 transitions. [2025-02-05 15:57:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:57:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) Word has length 3456 [2025-02-05 15:57:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:28,977 INFO L225 Difference]: With dead ends: 174 [2025-02-05 15:57:28,977 INFO L226 Difference]: Without dead ends: 170 [2025-02-05 15:57:28,978 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6948 GetRequests, 6898 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=1062, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 15:57:28,978 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 210 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:28,979 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 129 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-02-05 15:57:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2025-02-05 15:57:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 118 states have internal predecessors, (122), 35 states have call successors, (35), 26 states have call predecessors, (35), 14 states have return successors, (127), 25 states have call predecessors, (127), 35 states have call successors, (127) [2025-02-05 15:57:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 284 transitions. [2025-02-05 15:57:28,994 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 284 transitions. Word has length 3456 [2025-02-05 15:57:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:28,995 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 284 transitions. [2025-02-05 15:57:28,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2025-02-05 15:57:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 284 transitions. [2025-02-05 15:57:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7842 [2025-02-05 15:57:29,260 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:29,262 INFO L218 NwaCegarLoop]: trace histogram [1151, 1151, 931, 575, 575, 575, 575, 575, 575, 575, 356, 220, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:29,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-05 15:57:29,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 15:57:29,462 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:29,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1720734935, now seen corresponding path program 16 times [2025-02-05 15:57:29,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:29,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882048868] [2025-02-05 15:57:29,464 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:29,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:29,566 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 7841 statements into 2 equivalence classes.