./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum1.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 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:06:06,310 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:06:06,372 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:06:06,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:06:06,379 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:06:06,402 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:06:06,403 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:06:06,403 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:06:06,403 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:06:06,403 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:06:06,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:06:06,404 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:06:06,404 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:06:06,404 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:06:06,404 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:06:06,404 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:06:06,405 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:06:06,405 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:06:06,405 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:06:06,405 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:06:06,405 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:06:06,405 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:06:06,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:06:06,405 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:06:06,406 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:06:06,406 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:06:06,406 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:06:06,406 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:06:06,406 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:06:06,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:06:06,406 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:06:06,406 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:06:06,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:06:06,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:06:06,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:06:06,407 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 -> 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 [2025-02-07 17:06:06,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:06:06,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:06:06,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:06:06,712 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:06:06,712 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:06:06,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum1.c [2025-02-07 17:06:08,029 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/744e106e6/bde0aeb6da5a46ed83c3d93c0e273bfb/FLAG50dba04d3 [2025-02-07 17:06:08,274 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:06:08,287 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum1.c [2025-02-07 17:06:08,303 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/744e106e6/bde0aeb6da5a46ed83c3d93c0e273bfb/FLAG50dba04d3 [2025-02-07 17:06:08,329 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/744e106e6/bde0aeb6da5a46ed83c3d93c0e273bfb [2025-02-07 17:06:08,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:06:08,334 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:06:08,335 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:06:08,335 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:06:08,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:06:08,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6f5a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08, skipping insertion in model container [2025-02-07 17:06:08,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,357 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:06:08,486 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/array-crafted/zero_sum1.c[400,413] [2025-02-07 17:06:08,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:06:08,512 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:06:08,521 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/array-crafted/zero_sum1.c[400,413] [2025-02-07 17:06:08,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:06:08,544 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:06:08,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08 WrapperNode [2025-02-07 17:06:08,545 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:06:08,547 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:06:08,547 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:06:08,547 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:06:08,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,573 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2025-02-07 17:06:08,573 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:06:08,574 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:06:08,574 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:06:08,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:06:08,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,583 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,597 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-07 17:06:08,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,598 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,603 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,608 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:06:08,612 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:06:08,612 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:06:08,612 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:06:08,613 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (1/1) ... [2025-02-07 17:06:08,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:06:08,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:08,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 17:06:08,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 17:06:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:06:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:06:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:06:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 17:06:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:06:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:06:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:06:08,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:06:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:06:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:06:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 17:06:08,720 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:06:08,721 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:06:08,847 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-07 17:06:08,848 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:06:08,854 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:06:08,854 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:06:08,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:06:08 BoogieIcfgContainer [2025-02-07 17:06:08,855 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:06:08,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:06:08,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:06:08,861 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:06:08,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:06:08" (1/3) ... [2025-02-07 17:06:08,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ad2b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:06:08, skipping insertion in model container [2025-02-07 17:06:08,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:08" (2/3) ... [2025-02-07 17:06:08,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ad2b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:06:08, skipping insertion in model container [2025-02-07 17:06:08,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:06:08" (3/3) ... [2025-02-07 17:06:08,864 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2025-02-07 17:06:08,877 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:06:08,878 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum1.c that has 1 procedures, 12 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-07 17:06:08,923 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:06:08,935 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;@58a8563, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:06:08,935 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:06:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:08,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-07 17:06:08,942 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:08,942 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:08,943 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:08,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1635989224, now seen corresponding path program 1 times [2025-02-07 17:06:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:08,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294865450] [2025-02-07 17:06:08,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:08,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:09,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-07 17:06:09,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-07 17:06:09,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:09,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:09,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:09,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294865450] [2025-02-07 17:06:09,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294865450] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:06:09,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:06:09,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 17:06:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494449177] [2025-02-07 17:06:09,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:06:09,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 17:06:09,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:09,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 17:06:09,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:06:09,217 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:09,264 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2025-02-07 17:06:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 17:06:09,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-02-07 17:06:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:09,273 INFO L225 Difference]: With dead ends: 22 [2025-02-07 17:06:09,273 INFO L226 Difference]: Without dead ends: 9 [2025-02-07 17:06:09,276 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:06:09,279 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:09,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-02-07 17:06:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-02-07 17:06:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2025-02-07 17:06:09,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2025-02-07 17:06:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:09,314 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2025-02-07 17:06:09,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2025-02-07 17:06:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 17:06:09,315 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:09,315 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:09,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:06:09,316 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:09,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash -793403877, now seen corresponding path program 1 times [2025-02-07 17:06:09,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:09,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260647277] [2025-02-07 17:06:09,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:09,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:09,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 17:06:09,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 17:06:09,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:09,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:06:09,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:09,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260647277] [2025-02-07 17:06:09,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260647277] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:06:09,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:06:09,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:06:09,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732418663] [2025-02-07 17:06:09,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:06:09,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:06:09,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:09,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:06:09,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:06:09,434 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:09,465 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2025-02-07 17:06:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:06:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-07 17:06:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:09,466 INFO L225 Difference]: With dead ends: 15 [2025-02-07 17:06:09,467 INFO L226 Difference]: Without dead ends: 11 [2025-02-07 17:06:09,468 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:06:09,469 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:09,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-07 17:06:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-02-07 17:06:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-02-07 17:06:09,476 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2025-02-07 17:06:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:09,477 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-02-07 17:06:09,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-02-07 17:06:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-07 17:06:09,477 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:09,477 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:09,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:06:09,477 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:09,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2073621467, now seen corresponding path program 1 times [2025-02-07 17:06:09,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:09,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525950448] [2025-02-07 17:06:09,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:09,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:09,492 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-07 17:06:09,512 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 17:06:09,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:09,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 17:06:09,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:09,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525950448] [2025-02-07 17:06:09,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525950448] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:09,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115189072] [2025-02-07 17:06:09,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:09,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:09,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:09,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:09,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 17:06:09,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-07 17:06:09,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 17:06:09,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:09,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:09,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:06:09,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 17:06:09,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 17:06:09,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115189072] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:09,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:09,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 17:06:09,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743103736] [2025-02-07 17:06:09,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:09,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 17:06:09,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:09,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 17:06:09,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:06:09,800 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:09,828 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2025-02-07 17:06:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:06:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-02-07 17:06:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:09,829 INFO L225 Difference]: With dead ends: 19 [2025-02-07 17:06:09,829 INFO L226 Difference]: Without dead ends: 12 [2025-02-07 17:06:09,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:06:09,830 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:09,830 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-02-07 17:06:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-02-07 17:06:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2025-02-07 17:06:09,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2025-02-07 17:06:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:09,834 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2025-02-07 17:06:09,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2025-02-07 17:06:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 17:06:09,834 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:09,834 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:09,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 17:06:10,039 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 [2025-02-07 17:06:10,039 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:10,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1777312824, now seen corresponding path program 2 times [2025-02-07 17:06:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740836675] [2025-02-07 17:06:10,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:10,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-07 17:06:10,071 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 17:06:10,071 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:10,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 17:06:10,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:10,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740836675] [2025-02-07 17:06:10,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740836675] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:10,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878938437] [2025-02-07 17:06:10,166 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:10,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:10,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:10,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 17:06:10,208 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-07 17:06:10,229 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 17:06:10,229 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:10,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:10,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:06:10,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 17:06:10,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 17:06:10,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878938437] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:10,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:10,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 17:06:10,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486146725] [2025-02-07 17:06:10,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:10,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 17:06:10,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:10,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 17:06:10,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:06:10,322 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:10,370 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2025-02-07 17:06:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 17:06:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-07 17:06:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:10,371 INFO L225 Difference]: With dead ends: 19 [2025-02-07 17:06:10,371 INFO L226 Difference]: Without dead ends: 14 [2025-02-07 17:06:10,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:06:10,372 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:10,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-02-07 17:06:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-02-07 17:06:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2025-02-07 17:06:10,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2025-02-07 17:06:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:10,381 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2025-02-07 17:06:10,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2025-02-07 17:06:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-07 17:06:10,381 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:10,381 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:10,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 17:06:10,581 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 [2025-02-07 17:06:10,582 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:10,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1978458616, now seen corresponding path program 3 times [2025-02-07 17:06:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:10,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841157626] [2025-02-07 17:06:10,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:10,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:10,592 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 13 statements into 2 equivalence classes. [2025-02-07 17:06:10,625 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-07 17:06:10,625 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:06:10,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:11,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:11,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841157626] [2025-02-07 17:06:11,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841157626] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:11,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156982840] [2025-02-07 17:06:11,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:11,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:11,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:11,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:11,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 17:06:11,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 13 statements into 2 equivalence classes. [2025-02-07 17:06:11,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-07 17:06:11,323 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:06:11,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:11,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-07 17:06:11,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:11,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:11,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:11,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156982840] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:11,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:11,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 20 [2025-02-07 17:06:11,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364721434] [2025-02-07 17:06:11,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:11,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:06:11,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:11,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:06:11,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:11,655 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:11,766 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2025-02-07 17:06:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 17:06:11,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-02-07 17:06:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:11,768 INFO L225 Difference]: With dead ends: 21 [2025-02-07 17:06:11,768 INFO L226 Difference]: Without dead ends: 18 [2025-02-07 17:06:11,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:11,769 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:11,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-02-07 17:06:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2025-02-07 17:06:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2025-02-07 17:06:11,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2025-02-07 17:06:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:11,778 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2025-02-07 17:06:11,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2025-02-07 17:06:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 17:06:11,779 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:11,779 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:11,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 17:06:11,979 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 [2025-02-07 17:06:11,980 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:11,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1202643205, now seen corresponding path program 4 times [2025-02-07 17:06:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:11,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118718776] [2025-02-07 17:06:11,980 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:11,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:11,988 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 14 statements into 2 equivalence classes. [2025-02-07 17:06:11,995 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 10 of 14 statements. [2025-02-07 17:06:11,996 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:11,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:12,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118718776] [2025-02-07 17:06:12,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118718776] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689456926] [2025-02-07 17:06:12,057 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:12,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:12,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:12,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:12,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 17:06:12,094 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 14 statements into 2 equivalence classes. [2025-02-07 17:06:12,101 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 10 of 14 statements. [2025-02-07 17:06:12,101 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:12,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:12,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:12,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:12,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:12,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689456926] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:12,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:12,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-02-07 17:06:12,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344904593] [2025-02-07 17:06:12,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:12,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 17:06:12,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:12,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 17:06:12,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:06:12,191 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:12,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:12,239 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2025-02-07 17:06:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:06:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-07 17:06:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:12,240 INFO L225 Difference]: With dead ends: 23 [2025-02-07 17:06:12,240 INFO L226 Difference]: Without dead ends: 16 [2025-02-07 17:06:12,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:06:12,241 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:12,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-07 17:06:12,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2025-02-07 17:06:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2025-02-07 17:06:12,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 14 [2025-02-07 17:06:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:12,245 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2025-02-07 17:06:12,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2025-02-07 17:06:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 17:06:12,246 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:12,246 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:12,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:12,450 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 [2025-02-07 17:06:12,450 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:12,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash -286510373, now seen corresponding path program 5 times [2025-02-07 17:06:12,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:12,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272145496] [2025-02-07 17:06:12,451 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:12,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:12,464 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 14 statements into 3 equivalence classes. [2025-02-07 17:06:12,471 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 17:06:12,472 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:06:12,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:12,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:12,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272145496] [2025-02-07 17:06:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272145496] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:12,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609893557] [2025-02-07 17:06:12,561 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:12,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:12,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:12,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:12,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 17:06:12,603 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 14 statements into 3 equivalence classes. [2025-02-07 17:06:12,620 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 17:06:12,620 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:06:12,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:12,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:12,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:12,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:12,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609893557] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:12,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:12,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-02-07 17:06:12,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619098238] [2025-02-07 17:06:12,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:12,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 17:06:12,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:12,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 17:06:12,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:06:12,732 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:12,768 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2025-02-07 17:06:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:06:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-07 17:06:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:12,769 INFO L225 Difference]: With dead ends: 26 [2025-02-07 17:06:12,769 INFO L226 Difference]: Without dead ends: 16 [2025-02-07 17:06:12,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:06:12,770 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:12,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-07 17:06:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-02-07 17:06:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2025-02-07 17:06:12,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2025-02-07 17:06:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:12,774 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2025-02-07 17:06:12,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2025-02-07 17:06:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 17:06:12,775 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:12,775 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:12,782 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 [2025-02-07 17:06:12,975 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 [2025-02-07 17:06:12,976 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:12,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1369187256, now seen corresponding path program 6 times [2025-02-07 17:06:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:12,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372746920] [2025-02-07 17:06:12,976 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:12,983 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 3 equivalence classes. [2025-02-07 17:06:12,992 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 17:06:12,992 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:06:12,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:13,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372746920] [2025-02-07 17:06:13,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372746920] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841902640] [2025-02-07 17:06:13,072 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:13,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:13,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:13,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 17:06:13,109 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 3 equivalence classes. [2025-02-07 17:06:13,123 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 17:06:13,124 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:06:13,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:13,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:13,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:13,185 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:13,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841902640] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:13,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:13,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-02-07 17:06:13,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006490733] [2025-02-07 17:06:13,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:13,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 17:06:13,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:13,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 17:06:13,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:06:13,242 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:13,298 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2025-02-07 17:06:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:06:13,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-07 17:06:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:13,299 INFO L225 Difference]: With dead ends: 20 [2025-02-07 17:06:13,299 INFO L226 Difference]: Without dead ends: 17 [2025-02-07 17:06:13,299 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:06:13,300 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:13,300 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-02-07 17:06:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-02-07 17:06:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2025-02-07 17:06:13,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2025-02-07 17:06:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:13,303 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2025-02-07 17:06:13,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2025-02-07 17:06:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 17:06:13,304 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:13,304 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:13,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 17:06:13,508 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 [2025-02-07 17:06:13,508 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:13,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:13,508 INFO L85 PathProgramCache]: Analyzing trace with hash 504899771, now seen corresponding path program 7 times [2025-02-07 17:06:13,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180747755] [2025-02-07 17:06:13,509 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:13,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:13,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:06:13,539 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:06:13,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:13,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:14,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180747755] [2025-02-07 17:06:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180747755] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186995965] [2025-02-07 17:06:14,144 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:14,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:14,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:14,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:14,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 17:06:14,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:06:14,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:06:14,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:14,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:14,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-07 17:06:14,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:14,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:14,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:14,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186995965] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:14,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:14,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 30 [2025-02-07 17:06:14,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384080455] [2025-02-07 17:06:14,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:14,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 17:06:14,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:14,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 17:06:14,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2025-02-07 17:06:14,662 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:14,896 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2025-02-07 17:06:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:06:14,897 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-02-07 17:06:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:14,897 INFO L225 Difference]: With dead ends: 25 [2025-02-07 17:06:14,897 INFO L226 Difference]: Without dead ends: 22 [2025-02-07 17:06:14,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:06:14,898 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:14,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-02-07 17:06:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2025-02-07 17:06:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-02-07 17:06:14,902 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2025-02-07 17:06:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:14,902 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-02-07 17:06:14,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-02-07 17:06:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-07 17:06:14,903 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:14,903 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:14,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:15,103 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 [2025-02-07 17:06:15,104 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:15,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1527944536, now seen corresponding path program 8 times [2025-02-07 17:06:15,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:15,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718365184] [2025-02-07 17:06:15,104 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:15,110 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-07 17:06:15,116 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 17:06:15,116 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:15,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:15,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:15,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718365184] [2025-02-07 17:06:15,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718365184] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:15,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675726134] [2025-02-07 17:06:15,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:15,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:15,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:15,228 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:15,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 17:06:15,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-07 17:06:15,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 17:06:15,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:15,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:15,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:06:15,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:15,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:15,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675726134] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:15,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:15,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:06:15,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800449135] [2025-02-07 17:06:15,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:15,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:06:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:15,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:06:15,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:15,422 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:15,478 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2025-02-07 17:06:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:06:15,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-02-07 17:06:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:15,479 INFO L225 Difference]: With dead ends: 36 [2025-02-07 17:06:15,479 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 17:06:15,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:15,480 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:15,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 17:06:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-07 17:06:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2025-02-07 17:06:15,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2025-02-07 17:06:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:15,486 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2025-02-07 17:06:15,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2025-02-07 17:06:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 17:06:15,486 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:15,487 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:15,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 17:06:15,687 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 [2025-02-07 17:06:15,687 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:15,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:15,688 INFO L85 PathProgramCache]: Analyzing trace with hash -350573029, now seen corresponding path program 9 times [2025-02-07 17:06:15,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:15,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087472763] [2025-02-07 17:06:15,688 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:15,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:15,697 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-02-07 17:06:15,708 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 17:06:15,709 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:06:15,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:15,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087472763] [2025-02-07 17:06:15,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087472763] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072816880] [2025-02-07 17:06:15,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:15,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:15,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:15,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:15,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 17:06:15,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-02-07 17:06:15,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 17:06:15,882 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:06:15,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:15,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:06:15,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:15,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:16,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072816880] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:16,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:16,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:06:16,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145524590] [2025-02-07 17:06:16,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:16,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:06:16,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:16,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:06:16,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:16,031 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:16,096 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2025-02-07 17:06:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:06:16,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-02-07 17:06:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:16,096 INFO L225 Difference]: With dead ends: 28 [2025-02-07 17:06:16,097 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 17:06:16,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:06:16,097 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:16,098 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 17:06:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-07 17:06:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2025-02-07 17:06:16,101 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2025-02-07 17:06:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:16,101 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2025-02-07 17:06:16,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2025-02-07 17:06:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 17:06:16,102 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:16,102 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:16,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 17:06:16,306 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 [2025-02-07 17:06:16,306 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:16,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1952525608, now seen corresponding path program 10 times [2025-02-07 17:06:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727177916] [2025-02-07 17:06:16,306 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:16,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:16,312 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:06:16,323 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:06:16,323 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:06:16,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727177916] [2025-02-07 17:06:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727177916] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095046658] [2025-02-07 17:06:16,793 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:16,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:16,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:16,796 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:16,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 17:06:16,837 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:06:16,854 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:06:16,854 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:06:16,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:16,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-02-07 17:06:16,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:16,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:17,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:17,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095046658] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:17,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:17,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 38 [2025-02-07 17:06:17,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795058070] [2025-02-07 17:06:17,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:17,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-07 17:06:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:17,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-07 17:06:17,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 17:06:17,560 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:18,080 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2025-02-07 17:06:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-07 17:06:18,080 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-07 17:06:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:18,081 INFO L225 Difference]: With dead ends: 31 [2025-02-07 17:06:18,081 INFO L226 Difference]: Without dead ends: 28 [2025-02-07 17:06:18,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2025-02-07 17:06:18,083 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:18,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-07 17:06:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2025-02-07 17:06:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2025-02-07 17:06:18,090 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2025-02-07 17:06:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:18,091 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2025-02-07 17:06:18,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2025-02-07 17:06:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 17:06:18,091 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:18,092 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:18,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:18,296 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 [2025-02-07 17:06:18,296 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:18,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash 398783451, now seen corresponding path program 11 times [2025-02-07 17:06:18,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:18,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839367784] [2025-02-07 17:06:18,297 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:18,305 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 4 equivalence classes. [2025-02-07 17:06:18,319 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 17:06:18,320 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:18,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:18,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839367784] [2025-02-07 17:06:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839367784] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394823383] [2025-02-07 17:06:18,455 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:18,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:18,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:18,458 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:18,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 17:06:18,506 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 4 equivalence classes. [2025-02-07 17:06:18,530 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 17:06:18,530 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:18,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:18,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:06:18,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:18,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:18,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394823383] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:18,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:18,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:06:18,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988463963] [2025-02-07 17:06:18,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:18,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:06:18,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:18,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:06:18,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:06:18,714 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:18,783 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2025-02-07 17:06:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:06:18,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-02-07 17:06:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:18,784 INFO L225 Difference]: With dead ends: 42 [2025-02-07 17:06:18,784 INFO L226 Difference]: Without dead ends: 22 [2025-02-07 17:06:18,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:06:18,786 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:18,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-02-07 17:06:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-02-07 17:06:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2025-02-07 17:06:18,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2025-02-07 17:06:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:18,796 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2025-02-07 17:06:18,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2025-02-07 17:06:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-07 17:06:18,796 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:18,796 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:18,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:19,001 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 [2025-02-07 17:06:19,001 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:19,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:19,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1524557944, now seen corresponding path program 12 times [2025-02-07 17:06:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:19,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677782687] [2025-02-07 17:06:19,002 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:19,008 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 4 equivalence classes. [2025-02-07 17:06:19,025 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 17:06:19,026 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:06:19,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:19,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677782687] [2025-02-07 17:06:19,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677782687] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401979311] [2025-02-07 17:06:19,164 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:19,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:19,167 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:19,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 17:06:19,214 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 4 equivalence classes. [2025-02-07 17:06:19,234 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 17:06:19,235 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:06:19,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:19,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:06:19,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:19,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:19,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401979311] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:19,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:19,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-02-07 17:06:19,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918821265] [2025-02-07 17:06:19,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:19,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:06:19,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:19,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:06:19,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:19,433 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:19,521 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2025-02-07 17:06:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:06:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-02-07 17:06:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:19,522 INFO L225 Difference]: With dead ends: 32 [2025-02-07 17:06:19,522 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 17:06:19,523 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:06:19,523 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:19,524 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 17:06:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-07 17:06:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2025-02-07 17:06:19,533 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2025-02-07 17:06:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:19,534 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2025-02-07 17:06:19,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2025-02-07 17:06:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-07 17:06:19,535 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:19,535 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:19,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 17:06:19,736 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 [2025-02-07 17:06:19,736 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:19,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2020592229, now seen corresponding path program 13 times [2025-02-07 17:06:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:19,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244488523] [2025-02-07 17:06:19,737 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:19,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:19,743 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-07 17:06:19,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 17:06:19,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:19,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:20,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:20,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244488523] [2025-02-07 17:06:20,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244488523] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:20,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539661991] [2025-02-07 17:06:20,616 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:20,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:20,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:20,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:20,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 17:06:20,665 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-07 17:06:20,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 17:06:20,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:20,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:20,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-02-07 17:06:20,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:20,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:21,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539661991] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:21,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:21,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 15] total 44 [2025-02-07 17:06:21,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344255782] [2025-02-07 17:06:21,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:21,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-02-07 17:06:21,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:21,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-02-07 17:06:21,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 17:06:21,490 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:21,960 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2025-02-07 17:06:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:06:21,960 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-02-07 17:06:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:21,962 INFO L225 Difference]: With dead ends: 33 [2025-02-07 17:06:21,962 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 17:06:21,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=2263, Unknown=0, NotChecked=0, Total=2450 [2025-02-07 17:06:21,963 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:21,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:06:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 17:06:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2025-02-07 17:06:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2025-02-07 17:06:21,973 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2025-02-07 17:06:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:21,974 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2025-02-07 17:06:21,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2025-02-07 17:06:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 17:06:21,975 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:21,975 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:21,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 17:06:22,180 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 [2025-02-07 17:06:22,180 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:22,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1786182088, now seen corresponding path program 14 times [2025-02-07 17:06:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:22,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054405956] [2025-02-07 17:06:22,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:22,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-07 17:06:22,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:06:22,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:22,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:22,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:22,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054405956] [2025-02-07 17:06:22,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054405956] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:22,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369321938] [2025-02-07 17:06:22,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:22,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:22,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:22,341 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:22,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 17:06:22,387 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-07 17:06:22,406 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:06:22,406 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:22,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:22,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:06:22,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:22,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:22,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369321938] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:22,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:22,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:06:22,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642276915] [2025-02-07 17:06:22,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:22,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:06:22,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:22,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:06:22,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:06:22,628 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:22,692 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2025-02-07 17:06:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:06:22,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-02-07 17:06:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:22,693 INFO L225 Difference]: With dead ends: 48 [2025-02-07 17:06:22,693 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 17:06:22,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:06:22,694 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:22,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 17:06:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-02-07 17:06:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2025-02-07 17:06:22,701 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2025-02-07 17:06:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:22,701 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2025-02-07 17:06:22,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2025-02-07 17:06:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 17:06:22,702 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:22,702 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:22,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 17:06:22,903 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 [2025-02-07 17:06:22,903 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:22,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1613587717, now seen corresponding path program 15 times [2025-02-07 17:06:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:22,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786332407] [2025-02-07 17:06:22,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:22,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:22,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 4 equivalence classes. [2025-02-07 17:06:22,932 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 17:06:22,933 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:06:22,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786332407] [2025-02-07 17:06:23,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786332407] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802510396] [2025-02-07 17:06:23,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:23,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:23,070 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:23,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 17:06:23,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 4 equivalence classes. [2025-02-07 17:06:23,145 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 17:06:23,146 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:06:23,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:23,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:06:23,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:23,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:23,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802510396] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:23,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:23,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-02-07 17:06:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008194666] [2025-02-07 17:06:23,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:23,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-07 17:06:23,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:23,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-07 17:06:23,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-02-07 17:06:23,299 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:23,367 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2025-02-07 17:06:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:06:23,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-02-07 17:06:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:23,368 INFO L225 Difference]: With dead ends: 36 [2025-02-07 17:06:23,368 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 17:06:23,369 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:06:23,369 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:23,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 17:06:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2025-02-07 17:06:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2025-02-07 17:06:23,376 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 24 [2025-02-07 17:06:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:23,376 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2025-02-07 17:06:23,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2025-02-07 17:06:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 17:06:23,377 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:23,377 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:23,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 17:06:23,577 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 [2025-02-07 17:06:23,578 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:23,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 677411611, now seen corresponding path program 16 times [2025-02-07 17:06:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208467392] [2025-02-07 17:06:23,578 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:23,583 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-02-07 17:06:23,585 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 16 of 24 statements. [2025-02-07 17:06:23,585 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:23,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:23,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:23,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208467392] [2025-02-07 17:06:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208467392] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:23,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594463823] [2025-02-07 17:06:23,720 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:23,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:23,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:23,722 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:23,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 17:06:23,771 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-02-07 17:06:23,781 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 16 of 24 statements. [2025-02-07 17:06:23,782 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:23,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:23,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:06:23,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:23,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:23,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594463823] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:23,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:23,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-02-07 17:06:23,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408780736] [2025-02-07 17:06:23,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:23,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 17:06:23,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:23,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 17:06:23,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:06:23,976 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:24,084 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2025-02-07 17:06:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:06:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-02-07 17:06:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:24,085 INFO L225 Difference]: With dead ends: 29 [2025-02-07 17:06:24,085 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 17:06:24,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:06:24,085 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:24,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 17:06:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-02-07 17:06:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2025-02-07 17:06:24,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2025-02-07 17:06:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:24,094 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2025-02-07 17:06:24,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2025-02-07 17:06:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 17:06:24,096 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:24,096 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:24,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:24,296 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 [2025-02-07 17:06:24,297 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:24,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash -475044792, now seen corresponding path program 17 times [2025-02-07 17:06:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:24,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817449376] [2025-02-07 17:06:24,298 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:24,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:24,304 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 4 equivalence classes. [2025-02-07 17:06:24,337 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:06:24,337 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:24,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:25,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:25,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817449376] [2025-02-07 17:06:25,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817449376] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:25,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41633230] [2025-02-07 17:06:25,260 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:25,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:25,262 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:25,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 17:06:25,305 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 4 equivalence classes. [2025-02-07 17:06:25,329 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:06:25,329 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:25,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:25,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-02-07 17:06:25,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:25,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:25,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:25,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:25,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:26,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:26,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41633230] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:26,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:26,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 17] total 49 [2025-02-07 17:06:26,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822853184] [2025-02-07 17:06:26,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:26,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-07 17:06:26,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:26,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-07 17:06:26,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2203, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 17:06:26,358 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:26,723 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2025-02-07 17:06:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 17:06:26,723 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-02-07 17:06:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:26,723 INFO L225 Difference]: With dead ends: 37 [2025-02-07 17:06:26,723 INFO L226 Difference]: Without dead ends: 34 [2025-02-07 17:06:26,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=2203, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 17:06:26,725 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:26,725 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:06:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-07 17:06:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2025-02-07 17:06:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2025-02-07 17:06:26,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2025-02-07 17:06:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:26,737 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2025-02-07 17:06:26,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2025-02-07 17:06:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 17:06:26,738 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:26,738 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:26,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-07 17:06:26,938 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 [2025-02-07 17:06:26,938 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:26,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:26,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1841454917, now seen corresponding path program 18 times [2025-02-07 17:06:26,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:26,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129828569] [2025-02-07 17:06:26,939 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:26,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:26,947 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 5 equivalence classes. [2025-02-07 17:06:26,958 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:06:26,959 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:06:26,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:27,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:27,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129828569] [2025-02-07 17:06:27,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129828569] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:27,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257722204] [2025-02-07 17:06:27,142 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:27,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:27,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:27,145 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:27,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 17:06:27,201 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 5 equivalence classes. [2025-02-07 17:06:27,224 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:06:27,225 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:06:27,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:27,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:06:27,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:27,379 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:27,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257722204] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:27,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:27,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-02-07 17:06:27,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63772894] [2025-02-07 17:06:27,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:27,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:06:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:27,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:06:27,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:06:27,509 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:27,603 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2025-02-07 17:06:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:06:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-07 17:06:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:27,604 INFO L225 Difference]: With dead ends: 54 [2025-02-07 17:06:27,604 INFO L226 Difference]: Without dead ends: 29 [2025-02-07 17:06:27,605 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:06:27,605 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:27,606 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-07 17:06:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-02-07 17:06:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2025-02-07 17:06:27,620 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2025-02-07 17:06:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:27,620 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2025-02-07 17:06:27,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,620 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2025-02-07 17:06:27,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 17:06:27,624 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:27,625 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:27,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 17:06:27,825 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 [2025-02-07 17:06:27,826 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:27,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:27,826 INFO L85 PathProgramCache]: Analyzing trace with hash -464941400, now seen corresponding path program 19 times [2025-02-07 17:06:27,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:27,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808749863] [2025-02-07 17:06:27,827 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:27,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:27,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-07 17:06:27,837 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 17:06:27,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:27,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 17:06:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808749863] [2025-02-07 17:06:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808749863] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873145282] [2025-02-07 17:06:28,011 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:28,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:28,013 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:28,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 17:06:28,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-07 17:06:28,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 17:06:28,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:28,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:28,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:06:28,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 17:06:28,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 17:06:28,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873145282] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:28,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:28,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-02-07 17:06:28,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020370808] [2025-02-07 17:06:28,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:28,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:06:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:28,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:06:28,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:06:28,304 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:28,383 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2025-02-07 17:06:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:06:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-02-07 17:06:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:28,384 INFO L225 Difference]: With dead ends: 40 [2025-02-07 17:06:28,384 INFO L226 Difference]: Without dead ends: 29 [2025-02-07 17:06:28,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:06:28,385 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:28,385 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-07 17:06:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-02-07 17:06:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2025-02-07 17:06:28,396 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2025-02-07 17:06:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:28,396 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2025-02-07 17:06:28,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2025-02-07 17:06:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 17:06:28,398 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:28,398 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:28,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:28,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:28,599 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:28,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1098848891, now seen corresponding path program 20 times [2025-02-07 17:06:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:28,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730130864] [2025-02-07 17:06:28,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:28,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:28,606 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-07 17:06:28,622 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 17:06:28,622 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:28,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:29,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:29,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730130864] [2025-02-07 17:06:29,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730130864] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:29,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034169426] [2025-02-07 17:06:29,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:29,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:29,769 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:29,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 17:06:29,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-07 17:06:29,856 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 17:06:29,856 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:29,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:29,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-02-07 17:06:29,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:29,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:30,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 17:06:30,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034169426] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:30,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:30,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 19] total 45 [2025-02-07 17:06:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507325851] [2025-02-07 17:06:30,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:30,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-02-07 17:06:30,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:30,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-02-07 17:06:30,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2025-02-07 17:06:30,722 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:31,133 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2025-02-07 17:06:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-07 17:06:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-02-07 17:06:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:31,134 INFO L225 Difference]: With dead ends: 41 [2025-02-07 17:06:31,135 INFO L226 Difference]: Without dead ends: 38 [2025-02-07 17:06:31,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2025-02-07 17:06:31,136 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:31,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 17:06:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-07 17:06:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2025-02-07 17:06:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2025-02-07 17:06:31,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2025-02-07 17:06:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:31,149 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2025-02-07 17:06:31,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2025-02-07 17:06:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 17:06:31,149 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:31,149 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:31,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-07 17:06:31,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:31,350 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:31,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash -295391000, now seen corresponding path program 21 times [2025-02-07 17:06:31,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:31,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631053747] [2025-02-07 17:06:31,351 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:31,356 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-07 17:06:31,373 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 17:06:31,373 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:06:31,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 17:06:31,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631053747] [2025-02-07 17:06:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631053747] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760144872] [2025-02-07 17:06:31,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:31,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:31,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:31,577 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:31,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 17:06:31,630 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-07 17:06:31,654 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 17:06:31,654 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:06:31,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:31,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:06:31,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 17:06:31,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 17:06:31,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760144872] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:31,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:31,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-02-07 17:06:31,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29452038] [2025-02-07 17:06:31,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:31,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 17:06:31,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:31,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 17:06:31,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:06:31,926 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:32,003 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2025-02-07 17:06:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:06:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-02-07 17:06:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:32,004 INFO L225 Difference]: With dead ends: 60 [2025-02-07 17:06:32,004 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 17:06:32,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:06:32,005 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:32,005 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 17:06:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-07 17:06:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2025-02-07 17:06:32,013 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2025-02-07 17:06:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:32,014 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2025-02-07 17:06:32,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2025-02-07 17:06:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 17:06:32,014 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:32,014 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:32,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-07 17:06:32,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-07 17:06:32,215 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:32,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash -928948261, now seen corresponding path program 22 times [2025-02-07 17:06:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:32,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807746552] [2025-02-07 17:06:32,215 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:32,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:32,221 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-07 17:06:32,223 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 30 statements. [2025-02-07 17:06:32,224 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:32,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:32,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:32,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807746552] [2025-02-07 17:06:32,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807746552] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:32,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544621212] [2025-02-07 17:06:32,380 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:32,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:32,383 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:32,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-07 17:06:32,444 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-07 17:06:32,455 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 30 statements. [2025-02-07 17:06:32,456 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:32,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:32,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:06:32,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:32,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544621212] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:32,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:32,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2025-02-07 17:06:32,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436587344] [2025-02-07 17:06:32,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:32,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:06:32,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:32,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:06:32,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:06:32,711 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:32,796 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2025-02-07 17:06:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:06:32,797 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-02-07 17:06:32,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:32,797 INFO L225 Difference]: With dead ends: 44 [2025-02-07 17:06:32,797 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 17:06:32,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 17:06:32,798 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:32,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 17:06:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2025-02-07 17:06:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2025-02-07 17:06:32,809 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 30 [2025-02-07 17:06:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:32,809 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2025-02-07 17:06:32,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2025-02-07 17:06:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 17:06:32,809 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:32,810 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:32,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-07 17:06:33,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-07 17:06:33,010 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:33,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:33,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1698150395, now seen corresponding path program 23 times [2025-02-07 17:06:33,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:33,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643621739] [2025-02-07 17:06:33,011 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:33,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:33,018 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 5 equivalence classes. [2025-02-07 17:06:33,027 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:06:33,028 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 17:06:33,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:33,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:33,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643621739] [2025-02-07 17:06:33,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643621739] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:33,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965045934] [2025-02-07 17:06:33,225 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:33,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:33,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:33,227 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:33,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-07 17:06:33,291 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 5 equivalence classes. [2025-02-07 17:06:33,384 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:06:33,384 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 17:06:33,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:06:33,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:33,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:33,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965045934] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:33,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:33,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2025-02-07 17:06:33,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237957489] [2025-02-07 17:06:33,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:33,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-07 17:06:33,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:33,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-07 17:06:33,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:06:33,905 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:34,095 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2025-02-07 17:06:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 17:06:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-02-07 17:06:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:34,096 INFO L225 Difference]: With dead ends: 35 [2025-02-07 17:06:34,096 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 17:06:34,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 17 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2025-02-07 17:06:34,098 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:34,098 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 17:06:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-07 17:06:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2025-02-07 17:06:34,108 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2025-02-07 17:06:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:34,108 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2025-02-07 17:06:34,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2025-02-07 17:06:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 17:06:34,108 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:34,108 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:34,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:34,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-07 17:06:34,309 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:34,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:34,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1103086440, now seen corresponding path program 24 times [2025-02-07 17:06:34,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:34,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705080902] [2025-02-07 17:06:34,310 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:34,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:34,316 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 5 equivalence classes. [2025-02-07 17:06:34,346 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:06:34,346 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:06:34,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:35,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:35,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705080902] [2025-02-07 17:06:35,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705080902] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:35,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815682156] [2025-02-07 17:06:35,825 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:35,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:35,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:35,829 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-07 17:06:35,896 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 5 equivalence classes. [2025-02-07 17:06:35,925 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:06:35,925 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:06:35,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:35,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-02-07 17:06:35,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:36,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:06:36,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2025-02-07 17:06:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:36,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:45,085 INFO L349 Elim1Store]: treesize reduction 58, result has 87.9 percent of original size [2025-02-07 17:06:45,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 119 treesize of output 441 [2025-02-07 17:06:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:50,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815682156] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:50,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:50,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 74 [2025-02-07 17:06:50,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562761] [2025-02-07 17:06:50,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:50,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-02-07 17:06:50,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:50,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-02-07 17:06:50,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=4925, Unknown=2, NotChecked=0, Total=5402 [2025-02-07 17:06:50,531 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:52,922 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2025-02-07 17:06:52,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-07 17:06:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-02-07 17:06:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:52,922 INFO L225 Difference]: With dead ends: 58 [2025-02-07 17:06:52,922 INFO L226 Difference]: Without dead ends: 55 [2025-02-07 17:06:52,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=649, Invalid=6155, Unknown=2, NotChecked=0, Total=6806 [2025-02-07 17:06:52,924 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:52,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 17:06:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-07 17:06:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2025-02-07 17:06:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2025-02-07 17:06:52,938 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 31 [2025-02-07 17:06:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:52,938 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2025-02-07 17:06:52,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2025-02-07 17:06:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 17:06:52,938 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:52,939 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:52,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-07 17:06:53,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-07 17:06:53,139 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:53,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:53,140 INFO L85 PathProgramCache]: Analyzing trace with hash -164026981, now seen corresponding path program 25 times [2025-02-07 17:06:53,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089006928] [2025-02-07 17:06:53,140 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:53,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:53,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 17:06:53,152 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:06:53,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:53,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:53,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:53,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089006928] [2025-02-07 17:06:53,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089006928] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:53,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060938845] [2025-02-07 17:06:53,432 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:53,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:53,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:53,434 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:53,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-07 17:06:53,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 17:06:53,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:06:53,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:53,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:53,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:06:53,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:53,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:53,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060938845] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:53,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:53,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-02-07 17:06:53,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367147570] [2025-02-07 17:06:53,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:53,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:06:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:53,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:06:53,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:06:53,928 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:54,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:54,047 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2025-02-07 17:06:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:06:54,047 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-02-07 17:06:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:54,047 INFO L225 Difference]: With dead ends: 65 [2025-02-07 17:06:54,048 INFO L226 Difference]: Without dead ends: 33 [2025-02-07 17:06:54,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:06:54,048 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:54,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-07 17:06:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-02-07 17:06:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2025-02-07 17:06:54,058 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 32 [2025-02-07 17:06:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:54,058 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2025-02-07 17:06:54,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2025-02-07 17:06:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 17:06:54,058 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:54,058 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:54,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:54,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 17:06:54,259 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:54,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:54,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2139914651, now seen corresponding path program 26 times [2025-02-07 17:06:54,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:54,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795496417] [2025-02-07 17:06:54,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:54,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:54,267 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-07 17:06:54,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:06:54,272 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:54,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795496417] [2025-02-07 17:06:54,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795496417] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:54,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335239539] [2025-02-07 17:06:54,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:54,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:54,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:54,548 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:54,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-07 17:06:54,618 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-07 17:06:54,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:06:54,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:54,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:54,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:06:54,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:54,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:54,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335239539] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:54,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:54,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-02-07 17:06:54,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766830808] [2025-02-07 17:06:54,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:54,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:06:54,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:54,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:06:54,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:06:54,938 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:55,023 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2025-02-07 17:06:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:06:55,023 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-02-07 17:06:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:55,024 INFO L225 Difference]: With dead ends: 47 [2025-02-07 17:06:55,024 INFO L226 Difference]: Without dead ends: 35 [2025-02-07 17:06:55,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:06:55,025 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:55,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-07 17:06:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-02-07 17:06:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2025-02-07 17:06:55,036 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2025-02-07 17:06:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:55,037 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2025-02-07 17:06:55,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2025-02-07 17:06:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 17:06:55,037 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:55,037 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:55,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-02-07 17:06:55,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-07 17:06:55,238 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:55,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1629300901, now seen corresponding path program 27 times [2025-02-07 17:06:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:55,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113300998] [2025-02-07 17:06:55,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:55,244 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 6 equivalence classes. [2025-02-07 17:06:55,277 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 17:06:55,278 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:06:55,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:56,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113300998] [2025-02-07 17:06:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113300998] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148147879] [2025-02-07 17:06:56,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:56,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:56,884 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:56,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-07 17:06:56,956 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 6 equivalence classes. [2025-02-07 17:06:57,058 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 17:06:57,059 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:06:57,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:57,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 100 conjuncts are in the unsatisfiable core [2025-02-07 17:06:57,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:57,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-07 17:06:58,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:06:58,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:06:58,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:06:58,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:06:58,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:06:58,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:06:58,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:06:58,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 113 [2025-02-07 17:06:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 6 proven. 114 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:58,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:06:59,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148147879] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:59,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:59,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 25] total 65 [2025-02-07 17:06:59,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403389191] [2025-02-07 17:06:59,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:59,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-02-07 17:06:59,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:59,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-02-07 17:06:59,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3957, Unknown=0, NotChecked=0, Total=4160 [2025-02-07 17:06:59,599 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 65 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:00,447 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2025-02-07 17:07:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-07 17:07:00,448 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-02-07 17:07:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:00,448 INFO L225 Difference]: With dead ends: 49 [2025-02-07 17:07:00,448 INFO L226 Difference]: Without dead ends: 46 [2025-02-07 17:07:00,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=239, Invalid=4453, Unknown=0, NotChecked=0, Total=4692 [2025-02-07 17:07:00,449 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:00,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 17:07:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-07 17:07:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2025-02-07 17:07:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2025-02-07 17:07:00,463 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 34 [2025-02-07 17:07:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:00,463 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2025-02-07 17:07:00,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2025-02-07 17:07:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-07 17:07:00,464 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:00,464 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:00,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-07 17:07:00,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-07 17:07:00,664 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:00,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1031311368, now seen corresponding path program 28 times [2025-02-07 17:07:00,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:00,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764938254] [2025-02-07 17:07:00,665 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:00,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:00,674 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-07 17:07:00,677 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 35 statements. [2025-02-07 17:07:00,677 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:00,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:07:00,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:00,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764938254] [2025-02-07 17:07:00,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764938254] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:00,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301104935] [2025-02-07 17:07:00,945 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:00,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:00,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:00,947 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:00,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-07 17:07:01,017 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-07 17:07:01,028 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 35 statements. [2025-02-07 17:07:01,028 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:01,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:01,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 17:07:01,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:07:01,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:07:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301104935] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:01,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 36 [2025-02-07 17:07:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377843359] [2025-02-07 17:07:01,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:01,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-07 17:07:01,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:01,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-07 17:07:01,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 17:07:01,392 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:01,545 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2025-02-07 17:07:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 17:07:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-02-07 17:07:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:01,546 INFO L225 Difference]: With dead ends: 51 [2025-02-07 17:07:01,546 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 17:07:01,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=1603, Unknown=0, NotChecked=0, Total=2070 [2025-02-07 17:07:01,546 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:01,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 17:07:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2025-02-07 17:07:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2025-02-07 17:07:01,564 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 35 [2025-02-07 17:07:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:01,564 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2025-02-07 17:07:01,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2025-02-07 17:07:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-07 17:07:01,565 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:01,565 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:01,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-02-07 17:07:01,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:01,766 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:01,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash 232349736, now seen corresponding path program 29 times [2025-02-07 17:07:01,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:01,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561738567] [2025-02-07 17:07:01,766 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:01,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:01,775 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 6 equivalence classes. [2025-02-07 17:07:01,789 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 17:07:01,790 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:07:01,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:07:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561738567] [2025-02-07 17:07:02,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561738567] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436585598] [2025-02-07 17:07:02,088 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:02,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:02,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:02,090 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:02,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-07 17:07:02,176 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 6 equivalence classes. [2025-02-07 17:07:02,314 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 17:07:02,315 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:07:02,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:02,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 17:07:02,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:07:02,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:07:02,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436585598] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:02,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:02,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 33 [2025-02-07 17:07:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951441175] [2025-02-07 17:07:02,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:02,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 17:07:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:02,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 17:07:02,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:07:02,698 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:02,845 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2025-02-07 17:07:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 17:07:02,846 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-02-07 17:07:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:02,846 INFO L225 Difference]: With dead ends: 40 [2025-02-07 17:07:02,846 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 17:07:02,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 21 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 17:07:02,847 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:02,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 17:07:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2025-02-07 17:07:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2025-02-07 17:07:02,865 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2025-02-07 17:07:02,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:02,865 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2025-02-07 17:07:02,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2025-02-07 17:07:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-07 17:07:02,866 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:02,866 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:02,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-07 17:07:03,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:03,067 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:03,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1387061029, now seen corresponding path program 30 times [2025-02-07 17:07:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:03,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811027326] [2025-02-07 17:07:03,067 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:03,073 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 36 statements into 6 equivalence classes. [2025-02-07 17:07:03,092 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 17:07:03,092 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:07:03,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:07:03,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:03,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811027326] [2025-02-07 17:07:03,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811027326] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:03,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547628215] [2025-02-07 17:07:03,353 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:03,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:03,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:03,355 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:03,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-07 17:07:03,428 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 36 statements into 6 equivalence classes. [2025-02-07 17:07:03,472 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 17:07:03,472 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:07:03,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:03,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 17:07:03,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:07:03,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:07:03,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547628215] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:03,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:03,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 35 [2025-02-07 17:07:03,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7861106] [2025-02-07 17:07:03,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:03,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-07 17:07:03,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:03,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-07 17:07:03,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:07:03,825 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:03,892 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2025-02-07 17:07:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:07:03,892 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2025-02-07 17:07:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:03,893 INFO L225 Difference]: With dead ends: 63 [2025-02-07 17:07:03,893 INFO L226 Difference]: Without dead ends: 38 [2025-02-07 17:07:03,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 18 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:07:03,893 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:03,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-07 17:07:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-07 17:07:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2025-02-07 17:07:03,910 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 36 [2025-02-07 17:07:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:03,910 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2025-02-07 17:07:03,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2025-02-07 17:07:03,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 17:07:03,911 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:03,911 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:03,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-02-07 17:07:04,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-02-07 17:07:04,111 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:04,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:04,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1093383544, now seen corresponding path program 31 times [2025-02-07 17:07:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:04,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368166100] [2025-02-07 17:07:04,112 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:04,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:04,118 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 17:07:04,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 17:07:04,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:04,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:06,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368166100] [2025-02-07 17:07:06,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368166100] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240990145] [2025-02-07 17:07:06,154 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:06,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:06,158 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:06,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-02-07 17:07:06,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 17:07:06,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 17:07:06,257 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:06,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:06,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 112 conjuncts are in the unsatisfiable core [2025-02-07 17:07:06,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:06,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:07,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:07:08,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240990145] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:08,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:08,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 25] total 74 [2025-02-07 17:07:08,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944913069] [2025-02-07 17:07:08,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:08,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-02-07 17:07:08,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:08,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-02-07 17:07:08,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5144, Unknown=0, NotChecked=0, Total=5402 [2025-02-07 17:07:08,708 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 74 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:10,126 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2025-02-07 17:07:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-07 17:07:10,126 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-02-07 17:07:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:10,126 INFO L225 Difference]: With dead ends: 53 [2025-02-07 17:07:10,126 INFO L226 Difference]: Without dead ends: 50 [2025-02-07 17:07:10,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=372, Invalid=6768, Unknown=0, NotChecked=0, Total=7140 [2025-02-07 17:07:10,127 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:10,127 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-07 17:07:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-02-07 17:07:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2025-02-07 17:07:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2025-02-07 17:07:10,143 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 37 [2025-02-07 17:07:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:10,143 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2025-02-07 17:07:10,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2025-02-07 17:07:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-07 17:07:10,143 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:10,143 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:10,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:10,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-02-07 17:07:10,344 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:10,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 464880251, now seen corresponding path program 32 times [2025-02-07 17:07:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:10,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168452921] [2025-02-07 17:07:10,344 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:10,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:10,352 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-07 17:07:10,357 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 17:07:10,358 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:10,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:07:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168452921] [2025-02-07 17:07:10,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168452921] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217454145] [2025-02-07 17:07:10,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:10,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:10,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:10,666 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:10,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-02-07 17:07:10,746 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-07 17:07:10,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 17:07:10,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:10,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:10,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 17:07:10,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:07:11,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:07:11,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217454145] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:11,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:11,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2025-02-07 17:07:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558747404] [2025-02-07 17:07:11,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:11,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-07 17:07:11,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:11,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-07 17:07:11,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 17:07:11,215 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:11,332 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2025-02-07 17:07:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 17:07:11,332 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-02-07 17:07:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:11,333 INFO L225 Difference]: With dead ends: 78 [2025-02-07 17:07:11,333 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 17:07:11,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 21 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 17:07:11,333 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:11,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 17:07:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-02-07 17:07:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2025-02-07 17:07:11,350 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2025-02-07 17:07:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:11,350 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2025-02-07 17:07:11,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2025-02-07 17:07:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 17:07:11,351 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:11,351 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:11,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-02-07 17:07:11,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-02-07 17:07:11,551 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:11,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -778898200, now seen corresponding path program 33 times [2025-02-07 17:07:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:11,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038483307] [2025-02-07 17:07:11,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:11,558 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 7 equivalence classes. [2025-02-07 17:07:11,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:07:11,579 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 17:07:11,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 17:07:11,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:11,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038483307] [2025-02-07 17:07:11,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038483307] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:11,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501584767] [2025-02-07 17:07:11,865 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:11,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:11,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:11,867 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:11,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-02-07 17:07:11,947 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 7 equivalence classes. [2025-02-07 17:07:12,003 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:07:12,003 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 17:07:12,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:12,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 17:07:12,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 17:07:12,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 17:07:12,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501584767] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:12,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:12,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2025-02-07 17:07:12,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501445455] [2025-02-07 17:07:12,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:12,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-07 17:07:12,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:12,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-07 17:07:12,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 17:07:12,393 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:12,495 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2025-02-07 17:07:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-07 17:07:12,496 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-02-07 17:07:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:12,496 INFO L225 Difference]: With dead ends: 56 [2025-02-07 17:07:12,496 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 17:07:12,497 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 17:07:12,497 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:12,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 17:07:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-02-07 17:07:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2025-02-07 17:07:12,511 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 39 [2025-02-07 17:07:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:12,511 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2025-02-07 17:07:12,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2025-02-07 17:07:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 17:07:12,511 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:12,511 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:12,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-02-07 17:07:12,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:12,712 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:12,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1673958341, now seen corresponding path program 34 times [2025-02-07 17:07:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:12,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625926597] [2025-02-07 17:07:12,712 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:12,719 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-02-07 17:07:12,726 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:07:12,726 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:07:12,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 17:07:13,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:13,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625926597] [2025-02-07 17:07:13,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625926597] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:13,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882476877] [2025-02-07 17:07:13,982 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:13,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:13,984 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:13,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-02-07 17:07:14,066 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-02-07 17:07:14,094 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:07:14,094 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:07:14,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:14,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 119 conjuncts are in the unsatisfiable core [2025-02-07 17:07:14,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:14,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:15,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 17:07:17,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882476877] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:17,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:17,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 39, 27] total 87 [2025-02-07 17:07:17,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171602073] [2025-02-07 17:07:17,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:17,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2025-02-07 17:07:17,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:17,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2025-02-07 17:07:17,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=7057, Unknown=0, NotChecked=0, Total=7482 [2025-02-07 17:07:17,328 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:19,299 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2025-02-07 17:07:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-02-07 17:07:19,299 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-02-07 17:07:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:19,300 INFO L225 Difference]: With dead ends: 59 [2025-02-07 17:07:19,300 INFO L226 Difference]: Without dead ends: 56 [2025-02-07 17:07:19,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3415 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=668, Invalid=9838, Unknown=0, NotChecked=0, Total=10506 [2025-02-07 17:07:19,301 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:19,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 114 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-07 17:07:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-07 17:07:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2025-02-07 17:07:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2025-02-07 17:07:19,335 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 40 [2025-02-07 17:07:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:19,335 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2025-02-07 17:07:19,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2025-02-07 17:07:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-07 17:07:19,336 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:19,336 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:19,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-02-07 17:07:19,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:19,541 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:19,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:19,541 INFO L85 PathProgramCache]: Analyzing trace with hash -353069272, now seen corresponding path program 35 times [2025-02-07 17:07:19,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:19,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862690860] [2025-02-07 17:07:19,541 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:19,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:19,549 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 7 equivalence classes. [2025-02-07 17:07:19,562 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:07:19,562 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-07 17:07:19,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 17:07:19,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:19,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862690860] [2025-02-07 17:07:19,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862690860] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:19,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634297231] [2025-02-07 17:07:19,927 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:19,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:19,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:19,929 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:19,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-02-07 17:07:20,017 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 7 equivalence classes. [2025-02-07 17:07:20,153 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:07:20,153 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-07 17:07:20,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:20,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-07 17:07:20,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 17:07:20,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 17:07:20,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634297231] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:20,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:20,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 51 [2025-02-07 17:07:20,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311122957] [2025-02-07 17:07:20,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:20,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-02-07 17:07:20,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:20,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-02-07 17:07:20,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2097, Unknown=0, NotChecked=0, Total=2550 [2025-02-07 17:07:20,985 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:21,268 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2025-02-07 17:07:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-07 17:07:21,269 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-02-07 17:07:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:21,269 INFO L225 Difference]: With dead ends: 85 [2025-02-07 17:07:21,269 INFO L226 Difference]: Without dead ends: 44 [2025-02-07 17:07:21,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 23 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=723, Invalid=3183, Unknown=0, NotChecked=0, Total=3906 [2025-02-07 17:07:21,271 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:21,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-07 17:07:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-02-07 17:07:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2025-02-07 17:07:21,296 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2025-02-07 17:07:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:21,296 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2025-02-07 17:07:21,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2025-02-07 17:07:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-07 17:07:21,296 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:21,296 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:21,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-02-07 17:07:21,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-02-07 17:07:21,497 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:21,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1907292584, now seen corresponding path program 36 times [2025-02-07 17:07:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:21,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591455619] [2025-02-07 17:07:21,497 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:21,506 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 43 statements into 7 equivalence classes. [2025-02-07 17:07:21,542 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 17:07:21,542 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 17:07:21,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-07 17:07:23,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591455619] [2025-02-07 17:07:23,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591455619] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464328413] [2025-02-07 17:07:23,135 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:23,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:23,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:23,137 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:23,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-02-07 17:07:23,227 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 43 statements into 7 equivalence classes. [2025-02-07 17:07:23,341 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 17:07:23,341 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 17:07:23,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:23,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 137 conjuncts are in the unsatisfiable core [2025-02-07 17:07:23,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:23,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-07 17:07:24,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:25,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:07:25,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 108 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 128 treesize of output 383 [2025-02-07 17:07:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 3 proven. 228 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:07:25,762 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:07:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464328413] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:28,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:28,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 40, 32] total 85 [2025-02-07 17:07:28,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015231425] [2025-02-07 17:07:28,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:28,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2025-02-07 17:07:28,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:28,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2025-02-07 17:07:28,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=6792, Unknown=0, NotChecked=0, Total=7140 [2025-02-07 17:07:28,172 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 85 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)