./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.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_2calls_25-2.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 a9cccea737f311e9e2585bb4c0fd7fa7e4382857df72468b846279ab5798480b --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:57:36,797 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:57:36,852 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:57:36,860 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:57:36,861 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:57:36,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:57:36,883 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:57:36,884 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:57:36,884 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:57:36,884 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:57:36,884 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:57:36,885 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:57:36,885 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:57:36,885 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:57:36,885 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:57:36,885 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:57:36,886 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:57:36,886 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:57:36,886 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:57:36,886 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:57:36,886 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:57:36,886 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:57:36,886 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:57:36,887 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:57:36,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:57:36,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:57:36,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:57:36,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:57:36,888 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 -> a9cccea737f311e9e2585bb4c0fd7fa7e4382857df72468b846279ab5798480b [2025-02-05 15:57:37,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:57:37,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:57:37,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:57:37,181 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:57:37,182 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:57:37,182 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c [2025-02-05 15:57:38,389 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/74ffee096/f7e231499e1f45c280157f1974aa8908/FLAG2de966ae1 [2025-02-05 15:57:38,597 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:57:38,597 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c [2025-02-05 15:57:38,606 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/74ffee096/f7e231499e1f45c280157f1974aa8908/FLAG2de966ae1 [2025-02-05 15:57:38,981 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/74ffee096/f7e231499e1f45c280157f1974aa8908 [2025-02-05 15:57:38,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:57:38,984 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:57:38,985 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:57:38,985 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:57:38,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:57:38,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:57:38" (1/1) ... [2025-02-05 15:57:38,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df8b4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:38, skipping insertion in model container [2025-02-05 15:57:38,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:57:38" (1/1) ... [2025-02-05 15:57:38,997 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:57:39,080 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_2calls_25-2.c[952,965] [2025-02-05 15:57:39,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:57:39,092 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:57:39,102 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_2calls_25-2.c[952,965] [2025-02-05 15:57:39,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:57:39,112 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:57:39,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39 WrapperNode [2025-02-05 15:57:39,112 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:57:39,113 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:57:39,113 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:57:39,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:57:39,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,121 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,129 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-02-05 15:57:39,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:57:39,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:57:39,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:57:39,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:57:39,134 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,141 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 15:57:39,141 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,143 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:57:39,145 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:57:39,145 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:57:39,145 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:57:39,146 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (1/1) ... [2025-02-05 15:57:39,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:57:39,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:39,172 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 15:57:39,177 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 15:57:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:57:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:57:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-02-05 15:57:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-02-05 15:57:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-02-05 15:57:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-02-05 15:57:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:57:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:57:39,227 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:57:39,228 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:57:39,282 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-02-05 15:57:39,293 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-02-05 15:57:39,298 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-05 15:57:39,299 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:57:39,304 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:57:39,304 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:57:39,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:57:39 BoogieIcfgContainer [2025-02-05 15:57:39,304 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:57:39,306 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:57:39,306 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:57:39,309 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:57:39,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:57:38" (1/3) ... [2025-02-05 15:57:39,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef18435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:57:39, skipping insertion in model container [2025-02-05 15:57:39,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:39" (2/3) ... [2025-02-05 15:57:39,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef18435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:57:39, skipping insertion in model container [2025-02-05 15:57:39,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:57:39" (3/3) ... [2025-02-05 15:57:39,311 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-2.c [2025-02-05 15:57:39,320 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:57:39,322 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_25-2.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 15:57:39,350 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:57:39,357 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;@540981f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:57:39,357 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:57:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:57:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:57:39,363 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:39,363 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:39,363 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:39,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:39,366 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-02-05 15:57:39,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:39,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019436033] [2025-02-05 15:57:39,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:39,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:57:39,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:57:39,428 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:39,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:39,514 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 15:57:39,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:39,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019436033] [2025-02-05 15:57:39,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019436033] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:57:39,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:57:39,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:57:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665682882] [2025-02-05 15:57:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:57:39,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:57:39,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:39,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:57:39,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:57:39,534 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 15:57:39,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:39,601 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2025-02-05 15:57:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:57:39,603 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 15:57:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:39,607 INFO L225 Difference]: With dead ends: 41 [2025-02-05 15:57:39,607 INFO L226 Difference]: Without dead ends: 29 [2025-02-05 15:57:39,609 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 15:57:39,611 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:39,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-05 15:57:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-02-05 15:57:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 15:57:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-02-05 15:57:39,634 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-02-05 15:57:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:39,635 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-02-05 15:57:39,635 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 15:57:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-02-05 15:57:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 15:57:39,636 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:39,636 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:39,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:57:39,636 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:39,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:39,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-02-05 15:57:39,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:39,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26632209] [2025-02-05 15:57:39,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:39,641 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 15:57:39,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 15:57:39,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:39,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:39,680 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 15:57:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26632209] [2025-02-05 15:57:39,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26632209] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:57:39,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:57:39,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:57:39,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498243134] [2025-02-05 15:57:39,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:57:39,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:57:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:39,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:57:39,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:57:39,683 INFO L87 Difference]: Start difference. First operand 27 states and 34 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 15:57:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:39,719 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-02-05 15:57:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:57:39,720 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 15:57:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:39,720 INFO L225 Difference]: With dead ends: 33 [2025-02-05 15:57:39,720 INFO L226 Difference]: Without dead ends: 29 [2025-02-05 15:57:39,721 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 15:57:39,721 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:39,721 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:57:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-05 15:57:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-02-05 15:57:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 15:57:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-02-05 15:57:39,726 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-02-05 15:57:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:39,726 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-02-05 15:57:39,726 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 15:57:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-02-05 15:57:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 15:57:39,727 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:39,727 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:39,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:57:39,727 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:39,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-02-05 15:57:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:39,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501752842] [2025-02-05 15:57:39,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:39,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:39,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:57:39,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:57:39,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:39,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:39,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:39,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501752842] [2025-02-05 15:57:39,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501752842] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:39,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555359279] [2025-02-05 15:57:39,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:39,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:39,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:39,822 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 15:57:39,824 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 15:57:39,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:57:39,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:57:39,860 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:39,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:39,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:57:39,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:39,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:40,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555359279] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:40,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:40,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-02-05 15:57:40,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743451462] [2025-02-05 15:57:40,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:40,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:57:40,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:40,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:57:40,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:57:40,136 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 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 15:57:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:40,228 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-02-05 15:57:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:57:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 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 15:57:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:40,230 INFO L225 Difference]: With dead ends: 55 [2025-02-05 15:57:40,230 INFO L226 Difference]: Without dead ends: 31 [2025-02-05 15:57:40,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:57:40,231 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:40,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-05 15:57:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-02-05 15:57:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-02-05 15:57:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-02-05 15:57:40,236 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-02-05 15:57:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:40,236 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-02-05 15:57:40,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 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 15:57:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-02-05 15:57:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 15:57:40,237 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:40,237 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:40,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:57:40,442 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 15:57:40,442 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:40,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:40,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-02-05 15:57:40,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:40,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489990042] [2025-02-05 15:57:40,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:40,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:57:40,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:57:40,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:40,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:40,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489990042] [2025-02-05 15:57:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489990042] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142444603] [2025-02-05 15:57:40,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:40,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:40,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:40,521 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 15:57:40,526 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 15:57:40,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:57:40,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:57:40,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:40,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:40,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:57:40,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:40,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:40,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142444603] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:40,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:40,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-02-05 15:57:40,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050074362] [2025-02-05 15:57:40,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:40,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:57:40,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:40,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:57:40,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:57:40,728 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 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 15:57:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:40,818 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-02-05 15:57:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:57:40,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 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 15:57:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:40,819 INFO L225 Difference]: With dead ends: 40 [2025-02-05 15:57:40,819 INFO L226 Difference]: Without dead ends: 36 [2025-02-05 15:57:40,819 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:57:40,820 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:40,820 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-05 15:57:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-02-05 15:57:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-02-05 15:57:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-02-05 15:57:40,828 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-02-05 15:57:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:40,829 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-02-05 15:57:40,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 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 15:57:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-02-05 15:57:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-05 15:57:40,830 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:40,830 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:40,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:41,030 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 15:57:41,030 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:41,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-02-05 15:57:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:41,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062850513] [2025-02-05 15:57:41,031 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:41,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 15:57:41,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 15:57:41,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:41,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:57:41,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:41,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062850513] [2025-02-05 15:57:41,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062850513] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:41,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772573063] [2025-02-05 15:57:41,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:41,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:41,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:41,109 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 15:57:41,111 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 15:57:41,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 15:57:41,144 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 15:57:41,144 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:41,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:41,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:41,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:57:41,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:57:41,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772573063] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:41,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:41,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-02-05 15:57:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925018487] [2025-02-05 15:57:41,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:41,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-05 15:57:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:41,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-05 15:57:41,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:57:41,669 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:41,803 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-02-05 15:57:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:57:41,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-02-05 15:57:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:41,804 INFO L225 Difference]: With dead ends: 69 [2025-02-05 15:57:41,804 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 15:57:41,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:57:41,805 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:41,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 15:57:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-02-05 15:57:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-05 15:57:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-02-05 15:57:41,810 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-02-05 15:57:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:41,810 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-02-05 15:57:41,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:41,810 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-02-05 15:57:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 15:57:41,811 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:41,811 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:41,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:42,011 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 15:57:42,012 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:42,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:42,012 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-02-05 15:57:42,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:42,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508436443] [2025-02-05 15:57:42,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:42,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:42,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 15:57:42,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:57:42,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:42,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 15:57:42,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:42,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508436443] [2025-02-05 15:57:42,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508436443] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:42,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944958563] [2025-02-05 15:57:42,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:42,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:42,134 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 15:57:42,136 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 15:57:42,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 15:57:42,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:57:42,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:42,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:42,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:42,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:57:42,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:57:42,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944958563] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:42,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:42,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-02-05 15:57:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363767893] [2025-02-05 15:57:42,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:42,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:57:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:42,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:57:42,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:57:42,506 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:42,776 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-02-05 15:57:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:57:42,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-02-05 15:57:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:42,778 INFO L225 Difference]: With dead ends: 101 [2025-02-05 15:57:42,778 INFO L226 Difference]: Without dead ends: 68 [2025-02-05 15:57:42,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:57:42,779 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:42,780 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:57:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-05 15:57:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-02-05 15:57:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-02-05 15:57:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-02-05 15:57:42,791 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-02-05 15:57:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:42,791 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-02-05 15:57:42,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-02-05 15:57:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 15:57:42,792 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:42,792 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:42,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:57:42,993 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 15:57:42,993 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:42,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-02-05 15:57:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:42,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768162003] [2025-02-05 15:57:42,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:43,000 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 15:57:43,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:57:43,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:43,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-05 15:57:43,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768162003] [2025-02-05 15:57:43,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768162003] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095892702] [2025-02-05 15:57:43,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:43,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:43,158 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 15:57:43,160 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 15:57:43,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 15:57:43,194 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:57:43,194 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:43,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:43,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:57:43,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 15:57:43,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:57:43,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095892702] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:43,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:43,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-02-05 15:57:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288318426] [2025-02-05 15:57:43,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:43,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:57:43,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:43,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:57:43,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:57:43,685 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:57:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:43,821 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-02-05 15:57:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2025-02-05 15:57:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:43,823 INFO L225 Difference]: With dead ends: 102 [2025-02-05 15:57:43,823 INFO L226 Difference]: Without dead ends: 98 [2025-02-05 15:57:43,824 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:57:43,829 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:43,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-02-05 15:57:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-02-05 15:57:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-02-05 15:57:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-02-05 15:57:43,844 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-02-05 15:57:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:43,844 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-02-05 15:57:43,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:57:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-02-05 15:57:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-05 15:57:43,846 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:43,846 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:43,852 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 15:57:44,046 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 15:57:44,047 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:44,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1518497941, now seen corresponding path program 1 times [2025-02-05 15:57:44,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:44,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022544217] [2025-02-05 15:57:44,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:44,051 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:57:44,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:57:44,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:44,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-05 15:57:44,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022544217] [2025-02-05 15:57:44,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022544217] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:44,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875016985] [2025-02-05 15:57:44,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:44,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:44,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:44,182 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 15:57:44,186 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 15:57:44,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:57:44,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:57:44,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:44,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:44,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:57:44,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-05 15:57:44,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-05 15:57:45,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875016985] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:45,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:45,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-02-05 15:57:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919609961] [2025-02-05 15:57:45,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:45,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:57:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:45,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:57:45,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:45,118 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) [2025-02-05 15:57:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:45,587 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-02-05 15:57:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 15:57:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) Word has length 80 [2025-02-05 15:57:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:45,590 INFO L225 Difference]: With dead ends: 177 [2025-02-05 15:57:45,590 INFO L226 Difference]: Without dead ends: 104 [2025-02-05 15:57:45,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 15:57:45,596 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:45,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 341 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:57:45,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-05 15:57:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-02-05 15:57:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-02-05 15:57:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-02-05 15:57:45,610 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 80 [2025-02-05 15:57:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:45,611 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-02-05 15:57:45,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) [2025-02-05 15:57:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-02-05 15:57:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2025-02-05 15:57:45,614 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:45,614 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 11, 11, 11, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:45,626 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 15:57:45,814 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 15:57:45,815 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:45,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:45,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1546231154, now seen corresponding path program 1 times [2025-02-05 15:57:45,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:45,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254612232] [2025-02-05 15:57:45,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:45,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 173 statements into 1 equivalence classes. [2025-02-05 15:57:45,841 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 173 of 173 statements. [2025-02-05 15:57:45,841 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:45,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 54 proven. 198 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2025-02-05 15:57:46,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:46,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254612232] [2025-02-05 15:57:46,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254612232] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:46,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103954597] [2025-02-05 15:57:46,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:46,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:46,025 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 15:57:46,028 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 15:57:46,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 173 statements into 1 equivalence classes. [2025-02-05 15:57:46,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 173 of 173 statements. [2025-02-05 15:57:46,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:46,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:46,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:57:46,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 41 proven. 265 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2025-02-05 15:57:46,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 41 proven. 281 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2025-02-05 15:57:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103954597] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:47,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:47,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-02-05 15:57:47,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963579170] [2025-02-05 15:57:47,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:47,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:57:47,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:47,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:57:47,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:47,208 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-05 15:57:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:47,431 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-02-05 15:57:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:57:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 173 [2025-02-05 15:57:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:47,434 INFO L225 Difference]: With dead ends: 132 [2025-02-05 15:57:47,437 INFO L226 Difference]: Without dead ends: 128 [2025-02-05 15:57:47,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 330 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:57:47,438 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:47,439 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 199 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-02-05 15:57:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-02-05 15:57:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-02-05 15:57:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-02-05 15:57:47,450 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 173 [2025-02-05 15:57:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:47,451 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-02-05 15:57:47,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-05 15:57:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-02-05 15:57:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2025-02-05 15:57:47,454 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:47,454 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 22, 21, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 9, 9, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:47,460 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 15:57:47,658 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 15:57:47,658 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:47,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1219294668, now seen corresponding path program 2 times [2025-02-05 15:57:47,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:47,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387350072] [2025-02-05 15:57:47,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:47,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:47,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 353 statements into 2 equivalence classes. [2025-02-05 15:57:47,697 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 353 of 353 statements. [2025-02-05 15:57:47,697 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:47,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3517 backedges. 98 proven. 751 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2025-02-05 15:57:48,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:48,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387350072] [2025-02-05 15:57:48,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387350072] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:48,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723302880] [2025-02-05 15:57:48,147 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:48,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:48,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:48,152 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 15:57:48,153 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 15:57:48,207 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 353 statements into 2 equivalence classes. [2025-02-05 15:57:48,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 353 of 353 statements. [2025-02-05 15:57:48,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:48,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:48,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:57:48,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3517 backedges. 98 proven. 751 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2025-02-05 15:57:48,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3517 backedges. 98 proven. 775 refuted. 0 times theorem prover too weak. 2644 trivial. 0 not checked. [2025-02-05 15:57:50,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723302880] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:50,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:50,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-02-05 15:57:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32140069] [2025-02-05 15:57:50,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:50,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:57:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:50,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:57:50,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:57:50,042 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-02-05 15:57:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:50,220 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-02-05 15:57:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:50,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 353 [2025-02-05 15:57:50,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:50,223 INFO L225 Difference]: With dead ends: 148 [2025-02-05 15:57:50,224 INFO L226 Difference]: Without dead ends: 144 [2025-02-05 15:57:50,224 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 696 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:57:50,225 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:50,225 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 146 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-02-05 15:57:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-02-05 15:57:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-02-05 15:57:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-02-05 15:57:50,250 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 353 [2025-02-05 15:57:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:50,252 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-02-05 15:57:50,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-02-05 15:57:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-02-05 15:57:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2025-02-05 15:57:50,256 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:50,257 INFO L218 NwaCegarLoop]: trace histogram [35, 35, 32, 32, 28, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:50,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:50,457 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 15:57:50,458 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:50,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:50,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1037726716, now seen corresponding path program 3 times [2025-02-05 15:57:50,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55925040] [2025-02-05 15:57:50,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:50,473 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 459 statements into 28 equivalence classes. [2025-02-05 15:57:50,498 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 459 statements. [2025-02-05 15:57:50,498 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-05 15:57:50,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 924 proven. 94 refuted. 0 times theorem prover too weak. 5048 trivial. 0 not checked. [2025-02-05 15:57:50,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55925040] [2025-02-05 15:57:50,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55925040] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815240966] [2025-02-05 15:57:50,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:50,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:50,722 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 15:57:50,723 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 15:57:50,807 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 459 statements into 28 equivalence classes. [2025-02-05 15:57:50,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 459 statements. [2025-02-05 15:57:50,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-05 15:57:50,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:50,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:57:50,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 718 proven. 115 refuted. 0 times theorem prover too weak. 5233 trivial. 0 not checked. [2025-02-05 15:57:50,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 720 proven. 125 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2025-02-05 15:57:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815240966] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:52,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:52,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 13] total 23 [2025-02-05 15:57:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615300610] [2025-02-05 15:57:52,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:52,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:57:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:52,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:57:52,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:52,336 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) [2025-02-05 15:57:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:52,873 INFO L93 Difference]: Finished difference Result 332 states and 732 transitions. [2025-02-05 15:57:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-05 15:57:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) Word has length 459 [2025-02-05 15:57:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:52,876 INFO L225 Difference]: With dead ends: 332 [2025-02-05 15:57:52,876 INFO L226 Difference]: Without dead ends: 224 [2025-02-05 15:57:52,877 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 949 GetRequests, 905 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 15:57:52,878 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 77 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:52,878 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 378 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:57:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-02-05 15:57:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 181. [2025-02-05 15:57:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 121 states have internal predecessors, (144), 35 states have call successors, (35), 15 states have call predecessors, (35), 26 states have return successors, (148), 44 states have call predecessors, (148), 35 states have call successors, (148) [2025-02-05 15:57:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 327 transitions. [2025-02-05 15:57:52,895 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 327 transitions. Word has length 459 [2025-02-05 15:57:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:52,895 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 327 transitions. [2025-02-05 15:57:52,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) [2025-02-05 15:57:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 327 transitions. [2025-02-05 15:57:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2025-02-05 15:57:52,903 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:52,903 INFO L218 NwaCegarLoop]: trace histogram [54, 54, 41, 41, 38, 33, 27, 27, 27, 27, 27, 27, 27, 20, 20, 20, 20, 20, 20, 20, 18, 16, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:52,909 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 15:57:53,103 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 15:57:53,104 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:53,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 798243177, now seen corresponding path program 4 times [2025-02-05 15:57:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043323760] [2025-02-05 15:57:53,105 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:53,118 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 645 statements into 2 equivalence classes. [2025-02-05 15:57:53,146 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 547 of 645 statements. [2025-02-05 15:57:53,146 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:53,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12399 backedges. 233 proven. 1026 refuted. 0 times theorem prover too weak. 11140 trivial. 0 not checked. [2025-02-05 15:57:53,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043323760] [2025-02-05 15:57:53,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043323760] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037868874] [2025-02-05 15:57:53,386 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:53,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:53,388 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 15:57:53,390 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 15:57:53,476 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 645 statements into 2 equivalence classes. [2025-02-05 15:57:53,552 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 547 of 645 statements. [2025-02-05 15:57:53,552 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:53,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:53,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:53,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12399 backedges. 1743 proven. 6 refuted. 0 times theorem prover too weak. 10650 trivial. 0 not checked. [2025-02-05 15:57:53,627 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12399 backedges. 239 proven. 1210 refuted. 0 times theorem prover too weak. 10950 trivial. 0 not checked. [2025-02-05 15:57:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037868874] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:55,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:55,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-02-05 15:57:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725265517] [2025-02-05 15:57:55,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:55,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 15:57:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:55,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 15:57:55,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:57:55,070 INFO L87 Difference]: Start difference. First operand 181 states and 327 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-05 15:57:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:55,176 INFO L93 Difference]: Finished difference Result 354 states and 690 transitions. [2025-02-05 15:57:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:57:55,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 645 [2025-02-05 15:57:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:55,178 INFO L225 Difference]: With dead ends: 354 [2025-02-05 15:57:55,178 INFO L226 Difference]: Without dead ends: 178 [2025-02-05 15:57:55,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 1280 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:57:55,180 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:55,180 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 152 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2025-02-05 15:57:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2025-02-05 15:57:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 113 states have internal predecessors, (141), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (115), 38 states have call predecessors, (115), 33 states have call successors, (115) [2025-02-05 15:57:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 289 transitions. [2025-02-05 15:57:55,190 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 289 transitions. Word has length 645 [2025-02-05 15:57:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:55,191 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 289 transitions. [2025-02-05 15:57:55,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-05 15:57:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 289 transitions. [2025-02-05 15:57:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2025-02-05 15:57:55,193 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:55,193 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 25, 25, 25, 24, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 12, 10, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:55,200 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 15:57:55,393 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 15:57:55,394 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:55,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:55,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1293304031, now seen corresponding path program 1 times [2025-02-05 15:57:55,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:55,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109640763] [2025-02-05 15:57:55,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:55,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:55,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 407 statements into 1 equivalence classes. [2025-02-05 15:57:55,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 407 of 407 statements. [2025-02-05 15:57:55,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:55,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4828 backedges. 167 proven. 711 refuted. 0 times theorem prover too weak. 3950 trivial. 0 not checked. [2025-02-05 15:57:55,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109640763] [2025-02-05 15:57:55,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109640763] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842019750] [2025-02-05 15:57:55,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:55,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:55,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:55,862 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 15:57:55,866 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 15:57:55,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 407 statements into 1 equivalence classes. [2025-02-05 15:57:56,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 407 of 407 statements. [2025-02-05 15:57:56,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:56,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:56,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 15:57:56,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4828 backedges. 133 proven. 1010 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2025-02-05 15:57:56,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4828 backedges. 133 proven. 1043 refuted. 0 times theorem prover too weak. 3652 trivial. 0 not checked. [2025-02-05 15:57:58,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842019750] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:58,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:58,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 27 [2025-02-05 15:57:58,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087144105] [2025-02-05 15:57:58,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:58,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 15:57:58,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:58,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 15:57:58,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:57:58,185 INFO L87 Difference]: Start difference. First operand 171 states and 289 transitions. Second operand has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) [2025-02-05 15:57:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:58,486 INFO L93 Difference]: Finished difference Result 266 states and 610 transitions. [2025-02-05 15:57:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 15:57:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) Word has length 407 [2025-02-05 15:57:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:58,492 INFO L225 Difference]: With dead ends: 266 [2025-02-05 15:57:58,492 INFO L226 Difference]: Without dead ends: 258 [2025-02-05 15:57:58,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 794 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 15:57:58,494 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:58,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 256 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:57:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-02-05 15:57:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 208. [2025-02-05 15:57:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 138 states have (on average 1.181159420289855) internal successors, (163), 135 states have internal predecessors, (163), 41 states have call successors, (41), 19 states have call predecessors, (41), 28 states have return successors, (204), 53 states have call predecessors, (204), 41 states have call successors, (204) [2025-02-05 15:57:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 408 transitions. [2025-02-05 15:57:58,518 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 408 transitions. Word has length 407 [2025-02-05 15:57:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:58,520 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 408 transitions. [2025-02-05 15:57:58,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) [2025-02-05 15:57:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 408 transitions. [2025-02-05 15:57:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1334 [2025-02-05 15:57:58,538 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:58,539 INFO L218 NwaCegarLoop]: trace histogram [102, 102, 93, 93, 80, 79, 51, 51, 51, 51, 51, 51, 51, 46, 46, 46, 46, 46, 46, 46, 34, 28, 22, 14, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:58,555 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 15:57:58,739 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 15:57:58,740 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:58,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:58,740 INFO L85 PathProgramCache]: Analyzing trace with hash 834264777, now seen corresponding path program 5 times [2025-02-05 15:57:58,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:58,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572309930] [2025-02-05 15:57:58,743 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:57:58,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:58,769 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1333 statements into 84 equivalence classes. [2025-02-05 15:57:58,796 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 84 of 1333 statements. [2025-02-05 15:57:58,796 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-05 15:57:58,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 53197 backedges. 805 proven. 3287 refuted. 0 times theorem prover too weak. 49105 trivial. 0 not checked. [2025-02-05 15:57:58,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:58,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572309930] [2025-02-05 15:57:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572309930] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:58,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824893752] [2025-02-05 15:57:58,922 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:57:58,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:58,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:58,924 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 15:57:58,926 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 15:57:59,071 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1333 statements into 84 equivalence classes. [2025-02-05 15:57:59,086 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 84 of 1333 statements. [2025-02-05 15:57:59,086 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-05 15:57:59,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:59,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:57:59,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 53197 backedges. 13424 proven. 61 refuted. 0 times theorem prover too weak. 39712 trivial. 0 not checked. [2025-02-05 15:57:59,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 53197 backedges. 842 proven. 3618 refuted. 0 times theorem prover too weak. 48737 trivial. 0 not checked. [2025-02-05 15:58:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824893752] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:02,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:02,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 22 [2025-02-05 15:58:02,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250120018] [2025-02-05 15:58:02,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:02,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:58:02,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:02,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:58:02,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:58:02,653 INFO L87 Difference]: Start difference. First operand 208 states and 408 transitions. Second operand has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 22 states have internal predecessors, (87), 16 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 7 states have call predecessors, (29), 16 states have call successors, (29) [2025-02-05 15:58:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:02,964 INFO L93 Difference]: Finished difference Result 425 states and 959 transitions. [2025-02-05 15:58:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:58:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 22 states have internal predecessors, (87), 16 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 7 states have call predecessors, (29), 16 states have call successors, (29) Word has length 1333 [2025-02-05 15:58:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:02,966 INFO L225 Difference]: With dead ends: 425 [2025-02-05 15:58:02,966 INFO L226 Difference]: Without dead ends: 213 [2025-02-05 15:58:02,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2695 GetRequests, 2652 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 15:58:02,969 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:02,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 267 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2025-02-05 15:58:02,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 195. [2025-02-05 15:58:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 132 states have (on average 1.196969696969697) internal successors, (158), 128 states have internal predecessors, (158), 37 states have call successors, (37), 21 states have call predecessors, (37), 25 states have return successors, (157), 45 states have call predecessors, (157), 37 states have call successors, (157) [2025-02-05 15:58:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 352 transitions. [2025-02-05 15:58:02,981 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 352 transitions. Word has length 1333 [2025-02-05 15:58:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:02,981 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 352 transitions. [2025-02-05 15:58:02,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 22 states have internal predecessors, (87), 16 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 7 states have call predecessors, (29), 16 states have call successors, (29) [2025-02-05 15:58:02,982 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 352 transitions. [2025-02-05 15:58:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1086 [2025-02-05 15:58:02,987 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:02,988 INFO L218 NwaCegarLoop]: trace histogram [81, 81, 78, 78, 64, 63, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 24, 24, 18, 14, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:02,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-05 15:58:03,188 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 15:58:03,188 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:03,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash 928095091, now seen corresponding path program 6 times [2025-02-05 15:58:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422987934] [2025-02-05 15:58:03,189 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:58:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:03,206 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1085 statements into 68 equivalence classes. [2025-02-05 15:58:03,244 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 260 of 1085 statements. [2025-02-05 15:58:03,244 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-02-05 15:58:03,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 35025 backedges. 2835 proven. 60 refuted. 0 times theorem prover too weak. 32130 trivial. 0 not checked. [2025-02-05 15:58:03,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:03,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422987934] [2025-02-05 15:58:03,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422987934] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:03,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318787595] [2025-02-05 15:58:03,505 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:58:03,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:03,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:03,507 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 15:58:03,509 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 15:58:03,651 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1085 statements into 68 equivalence classes. [2025-02-05 15:58:03,698 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 260 of 1085 statements. [2025-02-05 15:58:03,698 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-02-05 15:58:03,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:03,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:58:03,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35025 backedges. 2715 proven. 37 refuted. 0 times theorem prover too weak. 32273 trivial. 0 not checked. [2025-02-05 15:58:03,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 35025 backedges. 2715 proven. 39 refuted. 0 times theorem prover too weak. 32271 trivial. 0 not checked. [2025-02-05 15:58:06,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318787595] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:06,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:06,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 22 [2025-02-05 15:58:06,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158101182] [2025-02-05 15:58:06,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:06,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:58:06,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:06,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:58:06,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:58:06,407 INFO L87 Difference]: Start difference. First operand 195 states and 352 transitions. Second operand has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 14 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) [2025-02-05 15:58:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:06,680 INFO L93 Difference]: Finished difference Result 398 states and 827 transitions. [2025-02-05 15:58:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:58:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 14 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) Word has length 1085 [2025-02-05 15:58:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:06,684 INFO L225 Difference]: With dead ends: 398 [2025-02-05 15:58:06,684 INFO L226 Difference]: Without dead ends: 202 [2025-02-05 15:58:06,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2194 GetRequests, 2158 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:58:06,687 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:06,687 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 341 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-02-05 15:58:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 188. [2025-02-05 15:58:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 128 states have (on average 1.0859375) internal successors, (139), 124 states have internal predecessors, (139), 35 states have call successors, (35), 21 states have call predecessors, (35), 24 states have return successors, (140), 42 states have call predecessors, (140), 35 states have call successors, (140) [2025-02-05 15:58:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 314 transitions. [2025-02-05 15:58:06,700 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 314 transitions. Word has length 1085 [2025-02-05 15:58:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:06,701 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 314 transitions. [2025-02-05 15:58:06,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 14 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) [2025-02-05 15:58:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 314 transitions. [2025-02-05 15:58:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1541 [2025-02-05 15:58:06,711 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:06,711 INFO L218 NwaCegarLoop]: trace histogram [118, 118, 107, 107, 94, 92, 59, 59, 59, 59, 59, 59, 59, 53, 53, 53, 53, 53, 53, 53, 39, 35, 26, 13, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:06,718 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 15:58:06,911 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 15:58:06,912 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:06,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 493028917, now seen corresponding path program 7 times [2025-02-05 15:58:06,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:06,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778087088] [2025-02-05 15:58:06,913 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:06,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:06,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1540 statements into 1 equivalence classes. [2025-02-05 15:58:07,105 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1540 of 1540 statements. [2025-02-05 15:58:07,105 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:07,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 71209 backedges. 594 proven. 4833 refuted. 0 times theorem prover too weak. 65782 trivial. 0 not checked. [2025-02-05 15:58:08,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:08,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778087088] [2025-02-05 15:58:08,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778087088] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:08,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925216388] [2025-02-05 15:58:08,724 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:08,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:08,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:08,729 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 15:58:08,730 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 15:58:08,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1540 statements into 1 equivalence classes. [2025-02-05 15:58:09,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1540 of 1540 statements. [2025-02-05 15:58:09,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:09,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:09,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 3437 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:58:09,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 71209 backedges. 594 proven. 4833 refuted. 0 times theorem prover too weak. 65782 trivial. 0 not checked. [2025-02-05 15:58:09,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 71209 backedges. 594 proven. 4877 refuted. 0 times theorem prover too weak. 65738 trivial. 0 not checked. [2025-02-05 15:58:14,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925216388] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:14,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:14,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 24 [2025-02-05 15:58:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495976717] [2025-02-05 15:58:14,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:14,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 15:58:14,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:14,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 15:58:14,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2025-02-05 15:58:14,683 INFO L87 Difference]: Start difference. First operand 188 states and 314 transitions. Second operand has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2025-02-05 15:58:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:15,016 INFO L93 Difference]: Finished difference Result 249 states and 522 transitions. [2025-02-05 15:58:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:58:15,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) Word has length 1540 [2025-02-05 15:58:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:15,021 INFO L225 Difference]: With dead ends: 249 [2025-02-05 15:58:15,021 INFO L226 Difference]: Without dead ends: 243 [2025-02-05 15:58:15,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3068 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:58:15,022 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:15,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 226 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-02-05 15:58:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 208. [2025-02-05 15:58:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 140 states have (on average 1.0785714285714285) internal successors, (151), 136 states have internal predecessors, (151), 39 states have call successors, (39), 21 states have call predecessors, (39), 28 states have return successors, (184), 50 states have call predecessors, (184), 39 states have call successors, (184) [2025-02-05 15:58:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 374 transitions. [2025-02-05 15:58:15,039 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 374 transitions. Word has length 1540 [2025-02-05 15:58:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:15,039 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 374 transitions. [2025-02-05 15:58:15,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2025-02-05 15:58:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 374 transitions. [2025-02-05 15:58:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1582 [2025-02-05 15:58:15,051 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:15,052 INFO L218 NwaCegarLoop]: trace histogram [120, 120, 111, 111, 96, 95, 60, 60, 60, 60, 60, 60, 60, 55, 55, 55, 55, 55, 55, 55, 40, 36, 25, 15, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:15,061 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 15:58:15,256 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 15:58:15,256 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:15,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1294459320, now seen corresponding path program 8 times [2025-02-05 15:58:15,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:15,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964526045] [2025-02-05 15:58:15,257 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:15,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:15,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1581 statements into 2 equivalence classes. [2025-02-05 15:58:15,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1581 of 1581 statements. [2025-02-05 15:58:15,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:15,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 75025 backedges. 1138 proven. 3187 refuted. 0 times theorem prover too weak. 70700 trivial. 0 not checked. [2025-02-05 15:58:16,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964526045] [2025-02-05 15:58:16,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964526045] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733312966] [2025-02-05 15:58:16,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:16,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:16,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:16,603 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 15:58:16,605 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 15:58:16,797 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1581 statements into 2 equivalence classes. [2025-02-05 15:58:17,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1581 of 1581 statements. [2025-02-05 15:58:17,041 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:17,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:17,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 3528 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 15:58:17,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 75025 backedges. 757 proven. 5467 refuted. 0 times theorem prover too weak. 68801 trivial. 0 not checked. [2025-02-05 15:58:17,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 75025 backedges. 757 proven. 5523 refuted. 0 times theorem prover too weak. 68745 trivial. 0 not checked. [2025-02-05 15:58:23,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733312966] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:23,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:23,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 23] total 32 [2025-02-05 15:58:23,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314789116] [2025-02-05 15:58:23,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:23,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 15:58:23,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:23,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 15:58:23,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:58:23,472 INFO L87 Difference]: Start difference. First operand 208 states and 374 transitions. Second operand has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 27 states have call successors, (32), 1 states have call predecessors, (32), 17 states have return successors, (46), 18 states have call predecessors, (46), 27 states have call successors, (46) [2025-02-05 15:58:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:23,792 INFO L93 Difference]: Finished difference Result 312 states and 786 transitions. [2025-02-05 15:58:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 15:58:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 27 states have call successors, (32), 1 states have call predecessors, (32), 17 states have return successors, (46), 18 states have call predecessors, (46), 27 states have call successors, (46) Word has length 1581 [2025-02-05 15:58:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:23,799 INFO L225 Difference]: With dead ends: 312 [2025-02-05 15:58:23,799 INFO L226 Difference]: Without dead ends: 304 [2025-02-05 15:58:23,801 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3191 GetRequests, 3137 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=1687, Unknown=0, NotChecked=0, Total=2070 [2025-02-05 15:58:23,801 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:23,801 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 307 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2025-02-05 15:58:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 206. [2025-02-05 15:58:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 139 states have (on average 1.079136690647482) internal successors, (150), 135 states have internal predecessors, (150), 38 states have call successors, (38), 21 states have call predecessors, (38), 28 states have return successors, (183), 49 states have call predecessors, (183), 38 states have call successors, (183) [2025-02-05 15:58:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 371 transitions. [2025-02-05 15:58:23,824 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 371 transitions. Word has length 1581 [2025-02-05 15:58:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:23,824 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 371 transitions. [2025-02-05 15:58:23,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 27 states have call successors, (32), 1 states have call predecessors, (32), 17 states have return successors, (46), 18 states have call predecessors, (46), 27 states have call successors, (46) [2025-02-05 15:58:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 371 transitions. [2025-02-05 15:58:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2614 [2025-02-05 15:58:23,850 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:23,851 INFO L218 NwaCegarLoop]: trace histogram [206, 206, 177, 177, 160, 151, 103, 103, 103, 103, 103, 103, 103, 88, 88, 88, 88, 88, 88, 88, 72, 48, 46, 26, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:23,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:24,055 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 15:58:24,055 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:24,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1930870839, now seen corresponding path program 9 times [2025-02-05 15:58:24,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:24,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506599625] [2025-02-05 15:58:24,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:58:24,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:24,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 2613 statements into 161 equivalence classes. [2025-02-05 15:58:24,172 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 236 of 2613 statements. [2025-02-05 15:58:24,172 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-02-05 15:58:24,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 207133 backedges. 8566 proven. 195 refuted. 0 times theorem prover too weak. 198372 trivial. 0 not checked. [2025-02-05 15:58:24,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:24,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506599625] [2025-02-05 15:58:24,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506599625] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:24,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215980032] [2025-02-05 15:58:24,344 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:58:24,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:24,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:24,347 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 15:58:24,349 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 15:58:24,634 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 2613 statements into 161 equivalence classes. [2025-02-05 15:58:24,679 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 236 of 2613 statements. [2025-02-05 15:58:24,679 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-02-05 15:58:24,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:24,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:58:24,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 207133 backedges. 8708 proven. 210 refuted. 0 times theorem prover too weak. 198215 trivial. 0 not checked. [2025-02-05 15:58:24,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 207133 backedges. 8710 proven. 214 refuted. 0 times theorem prover too weak. 198209 trivial. 0 not checked. [2025-02-05 15:58:31,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215980032] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:31,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:31,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 24 [2025-02-05 15:58:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494155524] [2025-02-05 15:58:31,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:31,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 15:58:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:31,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 15:58:31,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2025-02-05 15:58:31,652 INFO L87 Difference]: Start difference. First operand 206 states and 371 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 13 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (28), 14 states have call predecessors, (28), 13 states have call successors, (28) [2025-02-05 15:58:32,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:32,046 INFO L93 Difference]: Finished difference Result 489 states and 1103 transitions. [2025-02-05 15:58:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 15:58:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 13 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (28), 14 states have call predecessors, (28), 13 states have call successors, (28) Word has length 2613 [2025-02-05 15:58:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:32,053 INFO L225 Difference]: With dead ends: 489 [2025-02-05 15:58:32,054 INFO L226 Difference]: Without dead ends: 280 [2025-02-05 15:58:32,056 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5258 GetRequests, 5212 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 15:58:32,060 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 71 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:32,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 297 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2025-02-05 15:58:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 226. [2025-02-05 15:58:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 152 states have (on average 1.0855263157894737) internal successors, (165), 148 states have internal predecessors, (165), 43 states have call successors, (43), 23 states have call predecessors, (43), 30 states have return successors, (220), 54 states have call predecessors, (220), 43 states have call successors, (220) [2025-02-05 15:58:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 428 transitions. [2025-02-05 15:58:32,082 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 428 transitions. Word has length 2613 [2025-02-05 15:58:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:32,082 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 428 transitions. [2025-02-05 15:58:32,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 13 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (28), 14 states have call predecessors, (28), 13 states have call successors, (28) [2025-02-05 15:58:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 428 transitions. [2025-02-05 15:58:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2841 [2025-02-05 15:58:32,164 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:32,164 INFO L218 NwaCegarLoop]: trace histogram [219, 219, 196, 196, 181, 165, 109, 109, 109, 109, 109, 109, 109, 98, 98, 98, 98, 98, 98, 98, 83, 56, 38, 31, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:32,178 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 15:58:32,365 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 15:58:32,365 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:32,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1593160716, now seen corresponding path program 10 times [2025-02-05 15:58:32,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:32,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625581557] [2025-02-05 15:58:32,366 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:58:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:32,420 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2840 statements into 2 equivalence classes. [2025-02-05 15:58:32,731 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2422 of 2840 statements. [2025-02-05 15:58:32,732 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:58:32,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 244300 backedges. 1662 proven. 12088 refuted. 0 times theorem prover too weak. 230550 trivial. 0 not checked. [2025-02-05 15:58:36,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:36,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625581557] [2025-02-05 15:58:36,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625581557] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:36,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112662825] [2025-02-05 15:58:36,577 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:58:36,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:36,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:36,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:36,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 15:58:36,890 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2840 statements into 2 equivalence classes. [2025-02-05 15:58:37,243 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2422 of 2840 statements. [2025-02-05 15:58:37,243 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:58:37,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:37,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 5054 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 15:58:37,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 244300 backedges. 39597 proven. 427 refuted. 0 times theorem prover too weak. 204276 trivial. 0 not checked. [2025-02-05 15:58:37,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 244300 backedges. 1662 proven. 12911 refuted. 0 times theorem prover too weak. 229727 trivial. 0 not checked. [2025-02-05 15:58:46,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112662825] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:46,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:46,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 30 [2025-02-05 15:58:46,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588918172] [2025-02-05 15:58:46,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:46,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 15:58:46,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:46,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 15:58:46,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2025-02-05 15:58:46,299 INFO L87 Difference]: Start difference. First operand 226 states and 428 transitions. Second operand has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) [2025-02-05 15:58:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:46,834 INFO L93 Difference]: Finished difference Result 495 states and 1102 transitions. [2025-02-05 15:58:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-05 15:58:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) Word has length 2840 [2025-02-05 15:58:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:46,838 INFO L225 Difference]: With dead ends: 495 [2025-02-05 15:58:46,838 INFO L226 Difference]: Without dead ends: 251 [2025-02-05 15:58:46,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5723 GetRequests, 5662 SyntacticMatches, 11 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2025-02-05 15:58:46,841 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 67 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:46,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 519 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:58:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2025-02-05 15:58:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 233. [2025-02-05 15:58:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 158 states have (on average 1.0506329113924051) internal successors, (166), 155 states have internal predecessors, (166), 46 states have call successors, (46), 26 states have call predecessors, (46), 28 states have return successors, (167), 51 states have call predecessors, (167), 46 states have call successors, (167) [2025-02-05 15:58:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 379 transitions. [2025-02-05 15:58:46,856 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 379 transitions. Word has length 2840 [2025-02-05 15:58:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:46,857 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 379 transitions. [2025-02-05 15:58:46,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) [2025-02-05 15:58:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 379 transitions. [2025-02-05 15:58:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5472 [2025-02-05 15:58:46,957 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:46,958 INFO L218 NwaCegarLoop]: trace histogram [410, 410, 393, 393, 325, 324, 205, 205, 205, 205, 205, 205, 205, 196, 196, 196, 196, 196, 196, 196, 128, 120, 86, 68, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:46,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:47,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:47,159 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:47,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:47,160 INFO L85 PathProgramCache]: Analyzing trace with hash 300379277, now seen corresponding path program 11 times [2025-02-05 15:58:47,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:47,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803380] [2025-02-05 15:58:47,160 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:58:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:47,291 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 5471 statements into 340 equivalence classes. [2025-02-05 15:58:47,310 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 233 of 5471 statements. [2025-02-05 15:58:47,313 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-02-05 15:58:47,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 908548 backedges. 4295 proven. 26708 refuted. 0 times theorem prover too weak. 877545 trivial. 0 not checked. [2025-02-05 15:58:47,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:47,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803380] [2025-02-05 15:58:47,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803380] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:47,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337603230] [2025-02-05 15:58:47,638 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:58:47,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:47,640 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:47,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 15:58:48,107 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 5471 statements into 340 equivalence classes. [2025-02-05 15:58:48,150 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 233 of 5471 statements. [2025-02-05 15:58:48,150 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-02-05 15:58:48,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:48,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-05 15:58:48,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 908548 backedges. 206977 proven. 889 refuted. 0 times theorem prover too weak. 700682 trivial. 0 not checked. [2025-02-05 15:58:48,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:59:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 908548 backedges. 4281 proven. 26737 refuted. 0 times theorem prover too weak. 877530 trivial. 0 not checked. [2025-02-05 15:59:05,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337603230] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:59:05,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:59:05,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 26] total 36 [2025-02-05 15:59:05,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258787422] [2025-02-05 15:59:05,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:59:05,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-05 15:59:05,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:59:05,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-05 15:59:05,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 15:59:05,282 INFO L87 Difference]: Start difference. First operand 233 states and 379 transitions. Second operand has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 28 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (47), 13 states have call predecessors, (47), 28 states have call successors, (47) [2025-02-05 15:59:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:59:06,130 INFO L93 Difference]: Finished difference Result 566 states and 1079 transitions. [2025-02-05 15:59:06,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-05 15:59:06,131 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 28 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (47), 13 states have call predecessors, (47), 28 states have call successors, (47) Word has length 5471 [2025-02-05 15:59:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:59:06,133 INFO L225 Difference]: With dead ends: 566 [2025-02-05 15:59:06,133 INFO L226 Difference]: Without dead ends: 316 [2025-02-05 15:59:06,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10992 GetRequests, 10921 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=3065, Unknown=0, NotChecked=0, Total=3660 [2025-02-05 15:59:06,136 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 179 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 15:59:06,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 574 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 15:59:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2025-02-05 15:59:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2025-02-05 15:59:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 176 states have (on average 1.0511363636363635) internal successors, (185), 173 states have internal predecessors, (185), 52 states have call successors, (52), 30 states have call predecessors, (52), 30 states have return successors, (177), 55 states have call predecessors, (177), 52 states have call successors, (177) [2025-02-05 15:59:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 414 transitions. [2025-02-05 15:59:06,159 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 414 transitions. Word has length 5471 [2025-02-05 15:59:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:59:06,160 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 414 transitions. [2025-02-05 15:59:06,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 28 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (47), 13 states have call predecessors, (47), 28 states have call successors, (47) [2025-02-05 15:59:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 414 transitions. [2025-02-05 15:59:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3376 [2025-02-05 15:59:06,200 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:59:06,201 INFO L218 NwaCegarLoop]: trace histogram [257, 257, 238, 238, 205, 196, 128, 128, 128, 128, 128, 128, 128, 119, 119, 119, 119, 119, 119, 119, 86, 68, 52, 42, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:59:06,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-05 15:59:06,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:59:06,405 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:59:06,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:59:06,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1102650829, now seen corresponding path program 12 times [2025-02-05 15:59:06,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:59:06,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255103268] [2025-02-05 15:59:06,406 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:59:06,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:59:06,452 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 3375 statements into 215 equivalence classes. [2025-02-05 15:59:06,484 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 398 of 3375 statements. [2025-02-05 15:59:06,484 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:59:06,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:59:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 345012 backedges. 2411 proven. 12613 refuted. 0 times theorem prover too weak. 329988 trivial. 0 not checked. [2025-02-05 15:59:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:59:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255103268] [2025-02-05 15:59:06,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255103268] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:59:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908210296] [2025-02-05 15:59:06,800 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:59:06,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:59:06,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:59:06,802 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:59:06,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 15:59:07,280 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 3375 statements into 215 equivalence classes. [2025-02-05 15:59:07,360 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 398 of 3375 statements. [2025-02-05 15:59:07,360 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:59:07,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:59:07,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 15:59:07,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:59:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 345012 backedges. 2301 proven. 11281 refuted. 0 times theorem prover too weak. 331430 trivial. 0 not checked. [2025-02-05 15:59:07,486 INFO L312 TraceCheckSpWp]: Computing backward predicates...