./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono3_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/Mono3_1.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:52:38,222 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:52:38,275 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:52:38,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:52:38,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:52:38,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:52:38,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:52:38,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:52:38,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:52:38,310 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:52:38,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:52:38,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:52:38,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:52:38,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:52:38,311 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:52:38,311 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:52:38,312 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:52:38,313 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:52:38,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:52:38,313 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:52:38,314 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 -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2025-02-05 14:52:38,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:52:38,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:52:38,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:52:38,592 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:52:38,592 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:52:38,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2025-02-05 14:52:39,824 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/da2881bc1/25b762c357834f45979b6b885d7e1bd4/FLAG0a6a5a6db [2025-02-05 14:52:40,052 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:52:40,054 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2025-02-05 14:52:40,061 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/da2881bc1/25b762c357834f45979b6b885d7e1bd4/FLAG0a6a5a6db [2025-02-05 14:52:40,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/da2881bc1/25b762c357834f45979b6b885d7e1bd4 [2025-02-05 14:52:40,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:52:40,405 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:52:40,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:52:40,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:52:40,408 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:52:40,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,410 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dba5444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40, skipping insertion in model container [2025-02-05 14:52:40,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,419 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:52:40,515 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2025-02-05 14:52:40,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:52:40,534 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:52:40,541 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2025-02-05 14:52:40,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:52:40,555 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:52:40,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40 WrapperNode [2025-02-05 14:52:40,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:52:40,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:52:40,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:52:40,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:52:40,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,568 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,576 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2025-02-05 14:52:40,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:52:40,578 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:52:40,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:52:40,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:52:40,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,586 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,593 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 14:52:40,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,595 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:52:40,597 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:52:40,597 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:52:40,597 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:52:40,598 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (1/1) ... [2025-02-05 14:52:40,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:52:40,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:40,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 14:52:40,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 14:52:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:52:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:52:40,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:52:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:52:40,684 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:52:40,685 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:52:40,778 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-05 14:52:40,780 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:52:40,788 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:52:40,789 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:52:40,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:52:40 BoogieIcfgContainer [2025-02-05 14:52:40,789 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:52:40,791 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:52:40,791 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:52:40,795 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:52:40,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:52:40" (1/3) ... [2025-02-05 14:52:40,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3b262d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:52:40, skipping insertion in model container [2025-02-05 14:52:40,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:40" (2/3) ... [2025-02-05 14:52:40,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3b262d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:52:40, skipping insertion in model container [2025-02-05 14:52:40,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:52:40" (3/3) ... [2025-02-05 14:52:40,798 INFO L128 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2025-02-05 14:52:40,816 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:52:40,821 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Mono3_1.c that has 1 procedures, 12 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-05 14:52:40,872 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:52:40,888 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;@54f02d5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:52:40,888 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:52:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) 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) [2025-02-05 14:52:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-02-05 14:52:40,897 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:40,898 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-02-05 14:52:40,898 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:40,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash 40044997, now seen corresponding path program 1 times [2025-02-05 14:52:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:40,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585413222] [2025-02-05 14:52:40,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:40,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:40,966 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-05 14:52:40,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-05 14:52:40,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:40,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:41,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:41,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585413222] [2025-02-05 14:52:41,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585413222] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:52:41,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:52:41,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 14:52:41,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327590469] [2025-02-05 14:52:41,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:52:41,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 14:52:41,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:41,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 14:52:41,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 14:52:41,085 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:41,107 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2025-02-05 14:52:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 14:52:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-02-05 14:52:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:41,113 INFO L225 Difference]: With dead ends: 25 [2025-02-05 14:52:41,113 INFO L226 Difference]: Without dead ends: 11 [2025-02-05 14:52:41,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 14:52:41,117 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:41,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-05 14:52:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2025-02-05 14:52:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2025-02-05 14:52:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2025-02-05 14:52:41,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2025-02-05 14:52:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:41,137 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2025-02-05 14:52:41,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2025-02-05 14:52:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-05 14:52:41,138 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:41,138 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:41,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 14:52:41,138 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:41,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash -902066916, now seen corresponding path program 1 times [2025-02-05 14:52:41,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:41,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705528650] [2025-02-05 14:52:41,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:41,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:41,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 14:52:41,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 14:52:41,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:41,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:41,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705528650] [2025-02-05 14:52:41,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705528650] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575067949] [2025-02-05 14:52:41,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:41,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:41,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:41,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:41,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 14:52:41,309 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 14:52:41,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 14:52:41,316 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:41,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:41,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 14:52:41,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:41,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:41,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575067949] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:41,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:41,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2025-02-05 14:52:41,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915207075] [2025-02-05 14:52:41,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:41,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 14:52:41,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:41,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 14:52:41,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:52:41,495 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:41,593 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2025-02-05 14:52:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 14:52:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 [2025-02-05 14:52:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:41,593 INFO L225 Difference]: With dead ends: 26 [2025-02-05 14:52:41,593 INFO L226 Difference]: Without dead ends: 19 [2025-02-05 14:52:41,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2025-02-05 14:52:41,594 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:41,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-05 14:52:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2025-02-05 14:52:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2025-02-05 14:52:41,598 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2025-02-05 14:52:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:41,598 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2025-02-05 14:52:41,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2025-02-05 14:52:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 14:52:41,599 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:41,599 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:41,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 14:52:41,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:41,804 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:41,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1603154941, now seen corresponding path program 1 times [2025-02-05 14:52:41,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:41,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452819635] [2025-02-05 14:52:41,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:41,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-05 14:52:41,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 14:52:41,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:41,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:41,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:41,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452819635] [2025-02-05 14:52:41,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452819635] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70130414] [2025-02-05 14:52:41,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:41,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:41,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:41,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:41,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 14:52:41,985 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-05 14:52:41,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 14:52:41,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:41,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:41,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 14:52:41,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:52:42,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:52:42,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70130414] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:42,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:42,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2025-02-05 14:52:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056269945] [2025-02-05 14:52:42,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:42,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 14:52:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:42,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 14:52:42,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:52:42,098 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2025-02-05 14:52:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:42,262 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2025-02-05 14:52:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 14:52:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) Word has length 14 [2025-02-05 14:52:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:42,263 INFO L225 Difference]: With dead ends: 47 [2025-02-05 14:52:42,264 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 14:52:42,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:52:42,264 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:42,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:52:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 14:52:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-02-05 14:52:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 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) [2025-02-05 14:52:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2025-02-05 14:52:42,270 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 14 [2025-02-05 14:52:42,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:42,271 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2025-02-05 14:52:42,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2025-02-05 14:52:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2025-02-05 14:52:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 14:52:42,271 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:42,271 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1] [2025-02-05 14:52:42,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 14:52:42,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:42,472 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:42,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash -886904772, now seen corresponding path program 2 times [2025-02-05 14:52:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303817067] [2025-02-05 14:52:42,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:52:42,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:42,478 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-05 14:52:42,484 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:52:42,484 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:52:42,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:52:42,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:42,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303817067] [2025-02-05 14:52:42,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303817067] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:42,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002540163] [2025-02-05 14:52:42,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:52:42,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:42,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:42,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:42,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 14:52:42,629 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-05 14:52:42,637 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:52:42,637 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:52:42,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:42,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 14:52:42,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:52:42,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 14:52:42,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002540163] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:42,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:42,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2025-02-05 14:52:42,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559240270] [2025-02-05 14:52:42,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:42,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 14:52:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:42,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 14:52:42,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:52:42,772 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2025-02-05 14:52:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:43,087 INFO L93 Difference]: Finished difference Result 138 states and 188 transitions. [2025-02-05 14:52:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-05 14:52:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 20 [2025-02-05 14:52:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:43,089 INFO L225 Difference]: With dead ends: 138 [2025-02-05 14:52:43,089 INFO L226 Difference]: Without dead ends: 135 [2025-02-05 14:52:43,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2025-02-05 14:52:43,090 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:43,090 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:52:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2025-02-05 14:52:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 62. [2025-02-05 14:52:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2025-02-05 14:52:43,107 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 20 [2025-02-05 14:52:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:43,107 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2025-02-05 14:52:43,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2025-02-05 14:52:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2025-02-05 14:52:43,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 14:52:43,109 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:43,109 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1] [2025-02-05 14:52:43,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 14:52:43,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:43,313 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:43,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:43,314 INFO L85 PathProgramCache]: Analyzing trace with hash 978001606, now seen corresponding path program 3 times [2025-02-05 14:52:43,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:43,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523398229] [2025-02-05 14:52:43,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:52:43,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:43,323 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 7 equivalence classes. [2025-02-05 14:52:43,336 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 14:52:43,338 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 14:52:43,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:43,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523398229] [2025-02-05 14:52:43,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523398229] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003018999] [2025-02-05 14:52:43,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:52:43,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:43,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:43,462 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:43,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 14:52:43,482 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 7 equivalence classes. [2025-02-05 14:52:43,492 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 14:52:43,492 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 14:52:43,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:43,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 14:52:43,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:43,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:43,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003018999] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:43,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:43,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2025-02-05 14:52:43,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683972960] [2025-02-05 14:52:43,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:43,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 14:52:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:43,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 14:52:43,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2025-02-05 14:52:43,706 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2025-02-05 14:52:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:44,132 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2025-02-05 14:52:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 14:52:44,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 23 [2025-02-05 14:52:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:44,133 INFO L225 Difference]: With dead ends: 100 [2025-02-05 14:52:44,133 INFO L226 Difference]: Without dead ends: 48 [2025-02-05 14:52:44,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:52:44,138 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:44,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:52:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-05 14:52:44,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-02-05 14:52:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2025-02-05 14:52:44,144 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 23 [2025-02-05 14:52:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:44,144 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2025-02-05 14:52:44,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2025-02-05 14:52:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2025-02-05 14:52:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 14:52:44,145 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:44,145 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:44,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 14:52:44,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:44,349 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:44,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1802797478, now seen corresponding path program 4 times [2025-02-05 14:52:44,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:44,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275696167] [2025-02-05 14:52:44,349 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:52:44,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:44,355 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-02-05 14:52:44,362 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 14:52:44,363 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:52:44,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:44,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:44,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275696167] [2025-02-05 14:52:44,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275696167] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:44,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950549064] [2025-02-05 14:52:44,572 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:52:44,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:44,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:44,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:44,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 14:52:44,598 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-02-05 14:52:44,611 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 14:52:44,612 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:52:44,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:44,615 WARN L254 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-02-05 14:52:44,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:45,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:52:45,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950549064] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:45,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:45,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29, 17] total 57 [2025-02-05 14:52:45,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146230636] [2025-02-05 14:52:45,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:45,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-05 14:52:45,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:45,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-05 14:52:45,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 14:52:45,782 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:54,223 INFO L93 Difference]: Finished difference Result 531 states and 730 transitions. [2025-02-05 14:52:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2025-02-05 14:52:54,224 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 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 47 [2025-02-05 14:52:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:54,226 INFO L225 Difference]: With dead ends: 531 [2025-02-05 14:52:54,226 INFO L226 Difference]: Without dead ends: 522 [2025-02-05 14:52:54,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7784 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5768, Invalid=17184, Unknown=0, NotChecked=0, Total=22952 [2025-02-05 14:52:54,234 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:54,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 127 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-05 14:52:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2025-02-05 14:52:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 498. [2025-02-05 14:52:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.3722334004024146) internal successors, (682), 497 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 682 transitions. [2025-02-05 14:52:54,301 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 682 transitions. Word has length 47 [2025-02-05 14:52:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:54,301 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 682 transitions. [2025-02-05 14:52:54,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 682 transitions. [2025-02-05 14:52:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-05 14:52:54,302 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:54,302 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1] [2025-02-05 14:52:54,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 14:52:54,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:54,507 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:54,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash -27749595, now seen corresponding path program 5 times [2025-02-05 14:52:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:54,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650603203] [2025-02-05 14:52:54,508 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:52:54,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:54,514 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 17 equivalence classes. [2025-02-05 14:52:54,570 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 14:52:54,571 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-05 14:52:54,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 73 proven. 301 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:52:54,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:54,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650603203] [2025-02-05 14:52:54,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650603203] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:54,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436422354] [2025-02-05 14:52:54,851 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:52:54,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:54,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:54,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:54,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 14:52:54,881 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 17 equivalence classes. [2025-02-05 14:52:54,942 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 14:52:54,942 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-05 14:52:54,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:54,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-05 14:52:54,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 14:52:55,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 14:52:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436422354] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:55,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:55,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2025-02-05 14:52:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983888841] [2025-02-05 14:52:55,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:55,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-05 14:52:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:55,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-05 14:52:55,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1927, Unknown=0, NotChecked=0, Total=2256 [2025-02-05 14:52:55,863 INFO L87 Difference]: Start difference. First operand 498 states and 682 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:07,661 INFO L93 Difference]: Finished difference Result 1471 states and 2051 transitions. [2025-02-05 14:53:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2025-02-05 14:53:07,661 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 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 53 [2025-02-05 14:53:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:07,668 INFO L225 Difference]: With dead ends: 1471 [2025-02-05 14:53:07,668 INFO L226 Difference]: Without dead ends: 1018 [2025-02-05 14:53:07,678 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12005 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=8622, Invalid=24684, Unknown=0, NotChecked=0, Total=33306 [2025-02-05 14:53:07,679 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:07,680 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 118 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-05 14:53:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2025-02-05 14:53:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 548. [2025-02-05 14:53:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.3674588665447898) internal successors, (748), 547 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 748 transitions. [2025-02-05 14:53:07,747 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 748 transitions. Word has length 53 [2025-02-05 14:53:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:07,747 INFO L471 AbstractCegarLoop]: Abstraction has 548 states and 748 transitions. [2025-02-05 14:53:07,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 748 transitions. [2025-02-05 14:53:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-05 14:53:07,751 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:07,751 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 15, 3, 1, 1, 1, 1, 1] [2025-02-05 14:53:07,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:07,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 14:53:07,952 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:07,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash 292172422, now seen corresponding path program 6 times [2025-02-05 14:53:07,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:07,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345908111] [2025-02-05 14:53:07,952 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:07,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:07,957 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 19 equivalence classes. [2025-02-05 14:53:07,973 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 41 of 59 statements. [2025-02-05 14:53:07,973 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 14:53:07,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 161 proven. 15 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2025-02-05 14:53:08,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345908111] [2025-02-05 14:53:08,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345908111] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759102513] [2025-02-05 14:53:08,106 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:08,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:08,107 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:08,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 14:53:08,137 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 19 equivalence classes. [2025-02-05 14:53:08,166 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 41 of 59 statements. [2025-02-05 14:53:08,166 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 14:53:08,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:08,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 14:53:08,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 161 proven. 15 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2025-02-05 14:53:08,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 161 proven. 15 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2025-02-05 14:53:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759102513] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:08,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:08,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-05 14:53:08,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765347606] [2025-02-05 14:53:08,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:08,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 14:53:08,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:08,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 14:53:08,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:53:08,290 INFO L87 Difference]: Start difference. First operand 548 states and 748 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:12,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:16,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:20,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:24,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:28,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:32,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:36,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:40,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:44,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:48,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:48,979 INFO L93 Difference]: Finished difference Result 3488 states and 5202 transitions. [2025-02-05 14:53:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 14:53:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 59 [2025-02-05 14:53:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:48,989 INFO L225 Difference]: With dead ends: 3488 [2025-02-05 14:53:48,989 INFO L226 Difference]: Without dead ends: 3485 [2025-02-05 14:53:48,989 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2025-02-05 14:53:48,990 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 12 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:48,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 26 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 88 Invalid, 10 Unknown, 0 Unchecked, 40.2s Time] [2025-02-05 14:53:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2025-02-05 14:53:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 78. [2025-02-05 14:53:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.12987012987013) internal successors, (87), 77 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:49,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2025-02-05 14:53:49,017 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 59 [2025-02-05 14:53:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:49,018 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2025-02-05 14:53:49,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2025-02-05 14:53:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-02-05 14:53:49,018 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:49,019 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 15, 9, 1, 1, 1, 1, 1] [2025-02-05 14:53:49,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:49,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:49,219 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:49,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:49,220 INFO L85 PathProgramCache]: Analyzing trace with hash -59410618, now seen corresponding path program 7 times [2025-02-05 14:53:49,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:49,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742978643] [2025-02-05 14:53:49,220 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:49,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:49,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 14:53:49,240 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 14:53:49,240 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:49,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 407 proven. 345 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-05 14:53:49,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:49,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742978643] [2025-02-05 14:53:49,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742978643] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:49,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909108848] [2025-02-05 14:53:49,523 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:49,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:49,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:49,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:49,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 14:53:49,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 14:53:49,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 14:53:49,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:49,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:49,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-02-05 14:53:49,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 14:53:50,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 14:53:50,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909108848] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:50,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:50,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 19] total 57 [2025-02-05 14:53:50,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529554422] [2025-02-05 14:53:50,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:50,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-05 14:53:50,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:50,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-05 14:53:50,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=2705, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 14:53:50,993 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 57 states, 57 states have (on average 3.0) internal successors, (171), 57 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:12,952 INFO L93 Difference]: Finished difference Result 2321 states and 3085 transitions. [2025-02-05 14:54:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2025-02-05 14:54:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.0) internal successors, (171), 57 states have internal predecessors, (171), 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 77 [2025-02-05 14:54:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:12,959 INFO L225 Difference]: With dead ends: 2321 [2025-02-05 14:54:12,959 INFO L226 Difference]: Without dead ends: 2288 [2025-02-05 14:54:12,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13974 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=8783, Invalid=29829, Unknown=0, NotChecked=0, Total=38612 [2025-02-05 14:54:12,962 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:12,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 121 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-02-05 14:54:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2025-02-05 14:54:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2001. [2025-02-05 14:54:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 1.3285) internal successors, (2657), 2000 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2657 transitions. [2025-02-05 14:54:14,104 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2657 transitions. Word has length 77 [2025-02-05 14:54:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:14,104 INFO L471 AbstractCegarLoop]: Abstraction has 2001 states and 2657 transitions. [2025-02-05 14:54:14,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.0) internal successors, (171), 57 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2657 transitions. [2025-02-05 14:54:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-02-05 14:54:14,107 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:14,108 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 16, 10, 1, 1, 1, 1, 1] [2025-02-05 14:54:14,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:14,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:14,312 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:14,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1677640645, now seen corresponding path program 8 times [2025-02-05 14:54:14,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:14,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200173513] [2025-02-05 14:54:14,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:14,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:14,317 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 83 statements into 2 equivalence classes. [2025-02-05 14:54:14,331 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 83 of 83 statements. [2025-02-05 14:54:14,331 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:14,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 974 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-05 14:54:14,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200173513] [2025-02-05 14:54:14,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200173513] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680990690] [2025-02-05 14:54:14,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:14,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:14,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:14,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:14,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 14:54:14,821 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 83 statements into 2 equivalence classes. [2025-02-05 14:54:14,839 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 83 of 83 statements. [2025-02-05 14:54:14,839 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:14,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:14,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-05 14:54:14,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-05 14:54:14,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-05 14:54:15,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680990690] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:15,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:15,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 39 [2025-02-05 14:54:15,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163347324] [2025-02-05 14:54:15,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:15,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-05 14:54:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:15,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-05 14:54:15,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 14:54:15,639 INFO L87 Difference]: Start difference. First operand 2001 states and 2657 transitions. Second operand has 39 states, 39 states have (on average 3.3076923076923075) internal successors, (129), 39 states have internal predecessors, (129), 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)