./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum5.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 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:06:29,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:06:30,059 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:06:30,066 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:06:30,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:06:30,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:06:30,091 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:06:30,091 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:06:30,091 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:06:30,091 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:06:30,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:06:30,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:06:30,092 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:06:30,092 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:06:30,092 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:06:30,092 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:06:30,092 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:06:30,093 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:06:30,093 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:06:30,093 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:06:30,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:06:30,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:06:30,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:06:30,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:06:30,093 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:06:30,094 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:06:30,094 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:06:30,094 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:06:30,094 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:06:30,094 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:06:30,094 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:06:30,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:06:30,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:06:30,095 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:06:30,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:06:30,095 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:06:30,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:06:30,095 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:06:30,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:06:30,095 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:06:30,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:06:30,096 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:06:30,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:06:30,096 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 -> 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae [2025-02-07 17:06:30,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:06:30,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:06:30,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:06:30,399 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:06:30,399 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:06:30,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum5.c [2025-02-07 17:06:31,676 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/833b377d5/184c34f7e8bd4e03bbd9ac0a9e14b0c8/FLAGf5273647b [2025-02-07 17:06:31,908 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:06:31,908 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c [2025-02-07 17:06:31,926 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/833b377d5/184c34f7e8bd4e03bbd9ac0a9e14b0c8/FLAGf5273647b [2025-02-07 17:06:31,944 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/833b377d5/184c34f7e8bd4e03bbd9ac0a9e14b0c8 [2025-02-07 17:06:31,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:06:31,950 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:06:31,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:06:31,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:06:31,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:06:31,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:06:31" (1/1) ... [2025-02-07 17:06:31,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ce4f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:31, skipping insertion in model container [2025-02-07 17:06:31,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:06:31" (1/1) ... [2025-02-07 17:06:31,975 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:06:32,118 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c[400,413] [2025-02-07 17:06:32,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:06:32,157 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:06:32,166 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c[400,413] [2025-02-07 17:06:32,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:06:32,198 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:06:32,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32 WrapperNode [2025-02-07 17:06:32,199 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:06:32,200 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:06:32,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:06:32,200 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:06:32,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,216 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,236 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 119 [2025-02-07 17:06:32,236 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:06:32,237 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:06:32,237 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:06:32,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:06:32,244 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,247 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,261 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-07 17:06:32,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,271 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,272 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,276 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,277 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,278 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:06:32,279 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:06:32,282 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:06:32,283 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:06:32,284 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (1/1) ... [2025-02-07 17:06:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:06:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:32,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 17:06:32,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 17:06:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:06:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:06:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:06:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 17:06:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:06:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:06:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:06:32,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:06:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:06:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:06:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 17:06:32,406 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:06:32,408 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:06:32,632 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-07 17:06:32,632 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:06:32,642 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:06:32,644 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:06:32,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:06:32 BoogieIcfgContainer [2025-02-07 17:06:32,645 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:06:32,647 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:06:32,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:06:32,652 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:06:32,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:06:31" (1/3) ... [2025-02-07 17:06:32,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2960ad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:06:32, skipping insertion in model container [2025-02-07 17:06:32,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:32" (2/3) ... [2025-02-07 17:06:32,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2960ad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:06:32, skipping insertion in model container [2025-02-07 17:06:32,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:06:32" (3/3) ... [2025-02-07 17:06:32,657 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2025-02-07 17:06:32,672 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:06:32,674 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum5.c that has 1 procedures, 20 locations, 1 initial locations, 11 loop locations, and 1 error locations. [2025-02-07 17:06:32,731 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:06:32,742 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;@5ab31802, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:06:32,743 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:06:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 17:06:32,751 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:32,752 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:32,752 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:32,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash -714513936, now seen corresponding path program 1 times [2025-02-07 17:06:32,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:32,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313588431] [2025-02-07 17:06:32,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:32,829 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 17:06:32,845 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 17:06:32,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:32,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:33,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:33,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313588431] [2025-02-07 17:06:33,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313588431] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:06:33,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:06:33,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 17:06:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27955127] [2025-02-07 17:06:33,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:06:33,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 17:06:33,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:33,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 17:06:33,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:06:33,030 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:33,131 INFO L93 Difference]: Finished difference Result 38 states and 61 transitions. [2025-02-07 17:06:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 17:06:33,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-07 17:06:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:33,140 INFO L225 Difference]: With dead ends: 38 [2025-02-07 17:06:33,140 INFO L226 Difference]: Without dead ends: 17 [2025-02-07 17:06:33,143 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:06:33,151 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:33,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-02-07 17:06:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-02-07 17:06:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2025-02-07 17:06:33,182 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 15 [2025-02-07 17:06:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:33,183 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2025-02-07 17:06:33,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2025-02-07 17:06:33,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 17:06:33,183 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:33,183 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:33,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:06:33,184 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:33,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash 503628819, now seen corresponding path program 1 times [2025-02-07 17:06:33,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:33,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476621052] [2025-02-07 17:06:33,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:33,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:33,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:06:33,216 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:06:33,216 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:33,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:06:33,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:33,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476621052] [2025-02-07 17:06:33,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476621052] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:06:33,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:06:33,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:06:33,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898433360] [2025-02-07 17:06:33,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:06:33,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:06:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:33,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:06:33,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:06:33,310 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:33,405 INFO L93 Difference]: Finished difference Result 39 states and 67 transitions. [2025-02-07 17:06:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:06:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) Word has length 16 [2025-02-07 17:06:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:33,406 INFO L225 Difference]: With dead ends: 39 [2025-02-07 17:06:33,406 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 17:06:33,407 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:06:33,407 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:33,408 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 17:06:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-07 17:06:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2025-02-07 17:06:33,414 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2025-02-07 17:06:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:33,414 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2025-02-07 17:06:33,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2025-02-07 17:06:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 17:06:33,415 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:33,415 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:33,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:06:33,415 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:33,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1080579373, now seen corresponding path program 1 times [2025-02-07 17:06:33,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:33,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423870621] [2025-02-07 17:06:33,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:33,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:33,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-07 17:06:33,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:06:33,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:33,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:33,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:33,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423870621] [2025-02-07 17:06:33,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423870621] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272742818] [2025-02-07 17:06:33,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:33,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:33,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:33,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:33,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 17:06:33,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-07 17:06:33,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:06:33,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:33,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:06:33,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:33,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:33,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272742818] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:33,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:33,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 17:06:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228447796] [2025-02-07 17:06:33,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:33,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 17:06:33,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:33,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 17:06:33,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:06:33,834 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:33,892 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2025-02-07 17:06:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:06:33,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-07 17:06:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:33,893 INFO L225 Difference]: With dead ends: 51 [2025-02-07 17:06:33,894 INFO L226 Difference]: Without dead ends: 28 [2025-02-07 17:06:33,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:06:33,895 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:33,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-07 17:06:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-02-07 17:06:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2025-02-07 17:06:33,905 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 26 [2025-02-07 17:06:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:33,905 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2025-02-07 17:06:33,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2025-02-07 17:06:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 17:06:33,906 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:33,906 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:33,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 17:06:34,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:34,111 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:34,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1498110768, now seen corresponding path program 2 times [2025-02-07 17:06:34,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:34,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101479384] [2025-02-07 17:06:34,111 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:34,128 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-07 17:06:34,165 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 17:06:34,165 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:34,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:06:34,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:34,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101479384] [2025-02-07 17:06:34,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101479384] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:34,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926204846] [2025-02-07 17:06:34,273 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:34,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:34,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:34,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:34,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 17:06:34,329 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-07 17:06:34,356 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 17:06:34,357 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:34,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:34,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:06:34,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:06:34,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:06:34,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926204846] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:34,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:34,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 17:06:34,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545082202] [2025-02-07 17:06:34,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:34,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 17:06:34,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:34,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 17:06:34,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:06:34,500 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:34,622 INFO L93 Difference]: Finished difference Result 59 states and 87 transitions. [2025-02-07 17:06:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 17:06:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-02-07 17:06:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:34,627 INFO L225 Difference]: With dead ends: 59 [2025-02-07 17:06:34,627 INFO L226 Difference]: Without dead ends: 38 [2025-02-07 17:06:34,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:06:34,628 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:34,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-07 17:06:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-07 17:06:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2025-02-07 17:06:34,636 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2025-02-07 17:06:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:34,636 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2025-02-07 17:06:34,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2025-02-07 17:06:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 17:06:34,637 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:34,637 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:34,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 17:06:34,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:34,841 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:34,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1770121712, now seen corresponding path program 3 times [2025-02-07 17:06:34,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:34,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106478868] [2025-02-07 17:06:34,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:34,856 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 2 equivalence classes. [2025-02-07 17:06:34,910 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 17:06:34,910 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:06:34,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:37,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:37,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106478868] [2025-02-07 17:06:37,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106478868] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:37,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346785062] [2025-02-07 17:06:37,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:37,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:37,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:37,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 17:06:37,474 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 2 equivalence classes. [2025-02-07 17:06:37,508 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 17:06:37,508 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:06:37,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:37,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-02-07 17:06:37,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:37,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:38,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:06:38,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-02-07 17:06:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:38,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346785062] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:38,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:38,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2025-02-07 17:06:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626719225] [2025-02-07 17:06:38,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:38,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 17:06:38,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:38,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 17:06:38,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:06:38,176 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:38,493 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2025-02-07 17:06:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 17:06:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-02-07 17:06:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:38,495 INFO L225 Difference]: With dead ends: 69 [2025-02-07 17:06:38,495 INFO L226 Difference]: Without dead ends: 66 [2025-02-07 17:06:38,495 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:06:38,496 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:38,496 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:06:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-02-07 17:06:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2025-02-07 17:06:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2025-02-07 17:06:38,506 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 37 [2025-02-07 17:06:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:38,506 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2025-02-07 17:06:38,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2025-02-07 17:06:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-07 17:06:38,507 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:38,508 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:38,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 17:06:38,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:38,712 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:38,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash 960833523, now seen corresponding path program 4 times [2025-02-07 17:06:38,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:38,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300972869] [2025-02-07 17:06:38,713 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:38,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:38,724 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-02-07 17:06:38,731 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 34 of 38 statements. [2025-02-07 17:06:38,732 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:38,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-07 17:06:38,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:38,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300972869] [2025-02-07 17:06:38,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300972869] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:38,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967491429] [2025-02-07 17:06:38,833 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:38,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:38,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:38,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 17:06:38,879 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-02-07 17:06:38,898 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 34 of 38 statements. [2025-02-07 17:06:38,898 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:38,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:38,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:38,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-07 17:06:38,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-07 17:06:39,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967491429] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:39,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:39,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:06:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516456103] [2025-02-07 17:06:39,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:39,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:06:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:39,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:06:39,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:06:39,070 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:39,331 INFO L93 Difference]: Finished difference Result 130 states and 173 transitions. [2025-02-07 17:06:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 17:06:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 38 [2025-02-07 17:06:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:39,332 INFO L225 Difference]: With dead ends: 130 [2025-02-07 17:06:39,332 INFO L226 Difference]: Without dead ends: 75 [2025-02-07 17:06:39,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:06:39,333 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:39,334 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-02-07 17:06:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2025-02-07 17:06:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2025-02-07 17:06:39,346 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 38 [2025-02-07 17:06:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:39,346 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2025-02-07 17:06:39,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2025-02-07 17:06:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-07 17:06:39,347 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:39,347 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:39,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:39,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-07 17:06:39,552 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:39,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash 257190867, now seen corresponding path program 5 times [2025-02-07 17:06:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051336531] [2025-02-07 17:06:39,553 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:39,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:39,564 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 3 equivalence classes. [2025-02-07 17:06:39,582 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 17:06:39,583 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:06:39,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-07 17:06:39,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:39,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051336531] [2025-02-07 17:06:39,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051336531] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:39,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724684007] [2025-02-07 17:06:39,695 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:39,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:39,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:39,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:39,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 17:06:39,742 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 3 equivalence classes. [2025-02-07 17:06:39,818 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 17:06:39,819 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:06:39,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:39,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:39,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-07 17:06:39,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-07 17:06:40,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724684007] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:40,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:40,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:06:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616227231] [2025-02-07 17:06:40,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:40,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:06:40,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:40,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:06:40,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:06:40,003 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:40,214 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2025-02-07 17:06:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:06:40,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 38 [2025-02-07 17:06:40,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:40,217 INFO L225 Difference]: With dead ends: 75 [2025-02-07 17:06:40,217 INFO L226 Difference]: Without dead ends: 48 [2025-02-07 17:06:40,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-02-07 17:06:40,218 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:40,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-07 17:06:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-02-07 17:06:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2025-02-07 17:06:40,226 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 38 [2025-02-07 17:06:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:40,226 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2025-02-07 17:06:40,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2025-02-07 17:06:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-07 17:06:40,227 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:40,227 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:40,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 17:06:40,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:40,428 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:40,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash -422699888, now seen corresponding path program 6 times [2025-02-07 17:06:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626597090] [2025-02-07 17:06:40,429 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:40,442 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 3 equivalence classes. [2025-02-07 17:06:40,459 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 47 of 47 statements. [2025-02-07 17:06:40,459 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:06:40,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-07 17:06:40,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626597090] [2025-02-07 17:06:40,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626597090] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380416049] [2025-02-07 17:06:40,592 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:40,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:40,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:40,596 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:40,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 17:06:40,643 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 3 equivalence classes. [2025-02-07 17:06:40,675 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 47 of 47 statements. [2025-02-07 17:06:40,675 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:06:40,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:40,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:40,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-07 17:06:40,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-07 17:06:40,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380416049] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:40,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:40,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-02-07 17:06:40,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495929160] [2025-02-07 17:06:40,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:40,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 17:06:40,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:40,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 17:06:40,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:06:40,854 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:40,939 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2025-02-07 17:06:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:06:40,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-02-07 17:06:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:40,941 INFO L225 Difference]: With dead ends: 92 [2025-02-07 17:06:40,941 INFO L226 Difference]: Without dead ends: 49 [2025-02-07 17:06:40,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:06:40,944 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:40,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-07 17:06:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-02-07 17:06:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2025-02-07 17:06:40,952 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 47 [2025-02-07 17:06:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:40,952 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2025-02-07 17:06:40,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2025-02-07 17:06:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-07 17:06:40,953 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:40,954 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:40,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 17:06:41,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-07 17:06:41,155 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:41,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash -840944973, now seen corresponding path program 7 times [2025-02-07 17:06:41,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:41,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078933896] [2025-02-07 17:06:41,157 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:41,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-07 17:06:41,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:06:41,312 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:41,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:45,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078933896] [2025-02-07 17:06:45,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078933896] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:45,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547720334] [2025-02-07 17:06:45,252 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:45,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:45,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:45,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:45,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 17:06:45,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-07 17:06:45,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:06:45,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:45,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:45,349 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 138 conjuncts are in the unsatisfiable core [2025-02-07 17:06:45,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:45,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:45,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:46,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547720334] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:46,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:46,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 15, 11] total 47 [2025-02-07 17:06:46,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681617771] [2025-02-07 17:06:46,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:46,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-02-07 17:06:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:46,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-02-07 17:06:46,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2025-02-07 17:06:46,278 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 47 states, 47 states have (on average 2.74468085106383) internal successors, (129), 47 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) [2025-02-07 17:06:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:49,044 INFO L93 Difference]: Finished difference Result 203 states and 261 transitions. [2025-02-07 17:06:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-02-07 17:06:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.74468085106383) internal successors, (129), 47 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) Word has length 48 [2025-02-07 17:06:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:49,045 INFO L225 Difference]: With dead ends: 203 [2025-02-07 17:06:49,045 INFO L226 Difference]: Without dead ends: 141 [2025-02-07 17:06:49,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=500, Invalid=4612, Unknown=0, NotChecked=0, Total=5112 [2025-02-07 17:06:49,049 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:49,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 61 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-02-07 17:06:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-02-07 17:06:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 80. [2025-02-07 17:06:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.240506329113924) internal successors, (98), 79 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2025-02-07 17:06:49,068 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 48 [2025-02-07 17:06:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:49,068 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2025-02-07 17:06:49,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.74468085106383) internal successors, (129), 47 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) [2025-02-07 17:06:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2025-02-07 17:06:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 17:06:49,069 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:49,069 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:49,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 17:06:49,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:49,272 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:49,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:49,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1493940499, now seen corresponding path program 8 times [2025-02-07 17:06:49,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:49,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129439644] [2025-02-07 17:06:49,273 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:49,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:49,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-07 17:06:49,290 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:06:49,291 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:49,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-02-07 17:06:49,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:49,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129439644] [2025-02-07 17:06:49,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129439644] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:49,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026335886] [2025-02-07 17:06:49,418 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:49,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:49,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:49,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 17:06:49,470 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-07 17:06:49,504 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:06:49,504 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:49,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:49,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:06:49,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-02-07 17:06:49,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-02-07 17:06:49,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026335886] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:49,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:49,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:06:49,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825059934] [2025-02-07 17:06:49,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:49,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:06:49,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:49,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:06:49,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:49,659 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:49,835 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2025-02-07 17:06:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:06:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-02-07 17:06:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:49,837 INFO L225 Difference]: With dead ends: 129 [2025-02-07 17:06:49,838 INFO L226 Difference]: Without dead ends: 60 [2025-02-07 17:06:49,838 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:06:49,839 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:49,839 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 20 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-07 17:06:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-02-07 17:06:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2025-02-07 17:06:49,857 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 50 [2025-02-07 17:06:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:49,857 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2025-02-07 17:06:49,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2025-02-07 17:06:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-07 17:06:49,858 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:49,859 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:49,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 17:06:50,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:50,062 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:50,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash 365359664, now seen corresponding path program 9 times [2025-02-07 17:06:50,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:50,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440884322] [2025-02-07 17:06:50,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:50,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:50,073 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 3 equivalence classes. [2025-02-07 17:06:50,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 59 of 59 statements. [2025-02-07 17:06:50,177 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:06:50,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:54,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:54,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440884322] [2025-02-07 17:06:54,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440884322] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:54,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980275845] [2025-02-07 17:06:54,690 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:54,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:54,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:54,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:54,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 17:06:54,740 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 3 equivalence classes. [2025-02-07 17:06:54,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 59 of 59 statements. [2025-02-07 17:06:54,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:06:54,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:54,778 WARN L254 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 192 conjuncts are in the unsatisfiable core [2025-02-07 17:06:54,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:56,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:06:56,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2025-02-07 17:06:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:56,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:57,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:06:57,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 177 [2025-02-07 17:06:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980275845] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:59,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:59,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 21, 34] total 95 [2025-02-07 17:06:59,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897862368] [2025-02-07 17:06:59,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:59,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2025-02-07 17:06:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:59,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2025-02-07 17:06:59,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=8342, Unknown=0, NotChecked=0, Total=8930 [2025-02-07 17:06:59,253 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 95 states, 95 states have (on average 1.7789473684210526) internal successors, (169), 95 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:02,079 INFO L93 Difference]: Finished difference Result 174 states and 214 transitions. [2025-02-07 17:07:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-07 17:07:02,080 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.7789473684210526) internal successors, (169), 95 states have internal predecessors, (169), 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 [2025-02-07 17:07:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:02,082 INFO L225 Difference]: With dead ends: 174 [2025-02-07 17:07:02,082 INFO L226 Difference]: Without dead ends: 171 [2025-02-07 17:07:02,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4893 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=870, Invalid=11562, Unknown=0, NotChecked=0, Total=12432 [2025-02-07 17:07:02,084 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4294 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 4641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 4294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:02,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 4641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 4294 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2025-02-07 17:07:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-02-07 17:07:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 158. [2025-02-07 17:07:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.2420382165605095) internal successors, (195), 157 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2025-02-07 17:07:02,126 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 59 [2025-02-07 17:07:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:02,126 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2025-02-07 17:07:02,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.7789473684210526) internal successors, (169), 95 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2025-02-07 17:07:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-02-07 17:07:02,127 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:02,127 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:02,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 17:07:02,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:02,328 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:02,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1623364685, now seen corresponding path program 10 times [2025-02-07 17:07:02,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:02,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895765149] [2025-02-07 17:07:02,329 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:02,336 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 60 statements into 2 equivalence classes. [2025-02-07 17:07:02,342 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 54 of 60 statements. [2025-02-07 17:07:02,342 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:02,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-07 17:07:02,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:02,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895765149] [2025-02-07 17:07:02,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895765149] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:02,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106654754] [2025-02-07 17:07:02,460 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:02,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:02,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:02,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:02,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 17:07:02,503 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 60 statements into 2 equivalence classes. [2025-02-07 17:07:02,527 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 54 of 60 statements. [2025-02-07 17:07:02,527 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:02,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:02,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:07:02,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-07 17:07:02,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-07 17:07:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106654754] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:02,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:02,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:07:02,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804677726] [2025-02-07 17:07:02,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:02,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:07:02,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:02,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:07:02,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:07:02,710 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:02,985 INFO L93 Difference]: Finished difference Result 299 states and 367 transitions. [2025-02-07 17:07:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 17:07:02,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 60 [2025-02-07 17:07:02,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:02,987 INFO L225 Difference]: With dead ends: 299 [2025-02-07 17:07:02,987 INFO L226 Difference]: Without dead ends: 119 [2025-02-07 17:07:02,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:07:02,988 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:02,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-02-07 17:07:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2025-02-07 17:07:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2025-02-07 17:07:03,009 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 60 [2025-02-07 17:07:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:03,009 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2025-02-07 17:07:03,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2025-02-07 17:07:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-02-07 17:07:03,010 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:03,010 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:03,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 17:07:03,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 17:07:03,211 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:03,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash 687586227, now seen corresponding path program 11 times [2025-02-07 17:07:03,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:03,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367514362] [2025-02-07 17:07:03,212 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:03,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:03,219 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 60 statements into 4 equivalence classes. [2025-02-07 17:07:03,237 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 60 of 60 statements. [2025-02-07 17:07:03,237 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:07:03,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-07 17:07:03,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:03,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367514362] [2025-02-07 17:07:03,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367514362] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:03,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874493744] [2025-02-07 17:07:03,376 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:03,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:03,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:03,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 17:07:03,431 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 60 statements into 4 equivalence classes. [2025-02-07 17:07:03,565 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 60 of 60 statements. [2025-02-07 17:07:03,565 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:07:03,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:03,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:07:03,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-07 17:07:03,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-07 17:07:03,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874493744] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:03,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:03,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:07:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186383267] [2025-02-07 17:07:03,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:03,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:07:03,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:03,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:07:03,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:07:03,747 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:04,022 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2025-02-07 17:07:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:07:04,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 60 [2025-02-07 17:07:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:04,023 INFO L225 Difference]: With dead ends: 113 [2025-02-07 17:07:04,023 INFO L226 Difference]: Without dead ends: 70 [2025-02-07 17:07:04,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:07:04,024 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:04,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-02-07 17:07:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-02-07 17:07:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 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) [2025-02-07 17:07:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2025-02-07 17:07:04,037 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 60 [2025-02-07 17:07:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:04,037 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2025-02-07 17:07:04,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2025-02-07 17:07:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-07 17:07:04,037 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:04,037 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:04,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:04,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-07 17:07:04,242 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:04,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:04,242 INFO L85 PathProgramCache]: Analyzing trace with hash -63043408, now seen corresponding path program 12 times [2025-02-07 17:07:04,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:04,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968107335] [2025-02-07 17:07:04,242 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:04,250 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 69 statements into 4 equivalence classes. [2025-02-07 17:07:04,276 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 69 of 69 statements. [2025-02-07 17:07:04,276 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:07:04,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-02-07 17:07:04,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:04,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968107335] [2025-02-07 17:07:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968107335] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:04,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689271710] [2025-02-07 17:07:04,422 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:04,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:04,424 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:04,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 17:07:04,483 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 69 statements into 4 equivalence classes. [2025-02-07 17:07:04,537 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 69 of 69 statements. [2025-02-07 17:07:04,537 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:07:04,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:04,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:07:04,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-02-07 17:07:04,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-02-07 17:07:04,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689271710] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:04,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:04,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-02-07 17:07:04,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256753850] [2025-02-07 17:07:04,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:04,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:07:04,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:04,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:07:04,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:07:04,750 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 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) [2025-02-07 17:07:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:04,837 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2025-02-07 17:07:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:07:04,837 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 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) Word has length 69 [2025-02-07 17:07:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:04,838 INFO L225 Difference]: With dead ends: 134 [2025-02-07 17:07:04,838 INFO L226 Difference]: Without dead ends: 71 [2025-02-07 17:07:04,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:07:04,839 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:04,839 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-02-07 17:07:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2025-02-07 17:07:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2025-02-07 17:07:04,859 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 69 [2025-02-07 17:07:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:04,859 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2025-02-07 17:07:04,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 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) [2025-02-07 17:07:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2025-02-07 17:07:04,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-02-07 17:07:04,862 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:04,862 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:04,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 17:07:05,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:05,063 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:05,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -775712109, now seen corresponding path program 13 times [2025-02-07 17:07:05,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:05,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277066544] [2025-02-07 17:07:05,064 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:05,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:05,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-02-07 17:07:05,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-02-07 17:07:05,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:05,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:11,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:11,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277066544] [2025-02-07 17:07:11,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277066544] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:11,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632507416] [2025-02-07 17:07:11,805 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:11,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:11,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:11,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:11,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 17:07:11,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-02-07 17:07:11,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-02-07 17:07:11,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:11,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:11,911 WARN L254 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 222 conjuncts are in the unsatisfiable core [2025-02-07 17:07:11,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:11,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:12,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:07:13,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632507416] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:13,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:13,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 21, 15] total 68 [2025-02-07 17:07:13,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004629105] [2025-02-07 17:07:13,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:13,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2025-02-07 17:07:13,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:13,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2025-02-07 17:07:13,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=4295, Unknown=0, NotChecked=0, Total=4556 [2025-02-07 17:07:13,218 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 68 states, 68 states have (on average 2.7941176470588234) internal successors, (190), 68 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:16,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:16,342 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2025-02-07 17:07:16,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-07 17:07:16,343 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.7941176470588234) internal successors, (190), 68 states have internal predecessors, (190), 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 70 [2025-02-07 17:07:16,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:16,344 INFO L225 Difference]: With dead ends: 155 [2025-02-07 17:07:16,344 INFO L226 Difference]: Without dead ends: 152 [2025-02-07 17:07:16,346 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=642, Invalid=8288, Unknown=0, NotChecked=0, Total=8930 [2025-02-07 17:07:16,346 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3484 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 4234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 3484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:16,347 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 76 Invalid, 4234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 3484 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2025-02-07 17:07:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-02-07 17:07:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 73. [2025-02-07 17:07:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2025-02-07 17:07:16,365 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 70 [2025-02-07 17:07:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:16,365 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2025-02-07 17:07:16,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.7941176470588234) internal successors, (190), 68 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2025-02-07 17:07:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-02-07 17:07:16,366 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:16,366 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:16,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 17:07:16,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:16,567 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:16,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:16,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1722760144, now seen corresponding path program 14 times [2025-02-07 17:07:16,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:16,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174389135] [2025-02-07 17:07:16,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:16,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:16,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-02-07 17:07:16,588 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-02-07 17:07:16,588 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:16,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-02-07 17:07:16,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:16,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174389135] [2025-02-07 17:07:16,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174389135] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:16,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074250735] [2025-02-07 17:07:16,774 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:16,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:16,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:16,777 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:16,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 17:07:16,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-02-07 17:07:16,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-02-07 17:07:16,881 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:16,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:16,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:07:16,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-02-07 17:07:17,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-02-07 17:07:17,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074250735] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:17,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:17,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:07:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086574081] [2025-02-07 17:07:17,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:17,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:07:17,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:17,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:07:17,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:07:17,195 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:17,409 INFO L93 Difference]: Finished difference Result 194 states and 225 transitions. [2025-02-07 17:07:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:07:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2025-02-07 17:07:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:17,410 INFO L225 Difference]: With dead ends: 194 [2025-02-07 17:07:17,410 INFO L226 Difference]: Without dead ends: 74 [2025-02-07 17:07:17,411 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:07:17,411 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:17,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-02-07 17:07:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2025-02-07 17:07:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2025-02-07 17:07:17,431 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 71 [2025-02-07 17:07:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:17,431 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2025-02-07 17:07:17,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2025-02-07 17:07:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-02-07 17:07:17,431 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:17,431 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:17,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 17:07:17,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 17:07:17,632 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:17,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash -252061453, now seen corresponding path program 15 times [2025-02-07 17:07:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588589756] [2025-02-07 17:07:17,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:17,641 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 72 statements into 4 equivalence classes. [2025-02-07 17:07:17,673 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 72 of 72 statements. [2025-02-07 17:07:17,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:07:17,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2025-02-07 17:07:17,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:17,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588589756] [2025-02-07 17:07:17,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588589756] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:17,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254391231] [2025-02-07 17:07:17,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:17,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:17,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:17,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 17:07:17,918 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 72 statements into 4 equivalence classes. [2025-02-07 17:07:17,981 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 72 of 72 statements. [2025-02-07 17:07:17,981 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:07:17,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:17,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:07:17,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2025-02-07 17:07:18,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2025-02-07 17:07:18,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254391231] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:18,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:18,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:07:18,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292458343] [2025-02-07 17:07:18,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:18,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:07:18,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:18,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:07:18,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:07:18,221 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:18,528 INFO L93 Difference]: Finished difference Result 193 states and 229 transitions. [2025-02-07 17:07:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 17:07:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2025-02-07 17:07:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:18,529 INFO L225 Difference]: With dead ends: 193 [2025-02-07 17:07:18,529 INFO L226 Difference]: Without dead ends: 85 [2025-02-07 17:07:18,529 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 130 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:07:18,530 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:18,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 20 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-07 17:07:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2025-02-07 17:07:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2025-02-07 17:07:18,554 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 72 [2025-02-07 17:07:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:18,554 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2025-02-07 17:07:18,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2025-02-07 17:07:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-07 17:07:18,555 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:18,555 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:18,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 17:07:18,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 17:07:18,756 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:18,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash -876902381, now seen corresponding path program 16 times [2025-02-07 17:07:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:18,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167652366] [2025-02-07 17:07:18,756 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:18,765 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 80 statements into 2 equivalence classes. [2025-02-07 17:07:18,775 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 72 of 80 statements. [2025-02-07 17:07:18,775 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:18,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-02-07 17:07:18,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:18,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167652366] [2025-02-07 17:07:18,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167652366] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:18,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910966316] [2025-02-07 17:07:18,945 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:18,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:18,947 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:18,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 17:07:19,011 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 80 statements into 2 equivalence classes. [2025-02-07 17:07:19,052 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 72 of 80 statements. [2025-02-07 17:07:19,052 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:19,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:19,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:07:19,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-02-07 17:07:19,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-02-07 17:07:19,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910966316] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:19,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:19,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-02-07 17:07:19,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001452552] [2025-02-07 17:07:19,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:19,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 17:07:19,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:19,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 17:07:19,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:07:19,350 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:19,629 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2025-02-07 17:07:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:07:19,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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 80 [2025-02-07 17:07:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:19,630 INFO L225 Difference]: With dead ends: 85 [2025-02-07 17:07:19,630 INFO L226 Difference]: Without dead ends: 82 [2025-02-07 17:07:19,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 141 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:07:19,631 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:19,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 19 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-07 17:07:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-02-07 17:07:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2025-02-07 17:07:19,659 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 80 [2025-02-07 17:07:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:19,659 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2025-02-07 17:07:19,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2025-02-07 17:07:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-07 17:07:19,659 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:19,659 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:19,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:19,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 17:07:19,860 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:19,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1414138288, now seen corresponding path program 17 times [2025-02-07 17:07:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:19,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716109602] [2025-02-07 17:07:19,860 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:19,868 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 81 statements into 4 equivalence classes. [2025-02-07 17:07:20,248 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 17:07:20,248 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:07:20,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716109602] [2025-02-07 17:07:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716109602] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229940936] [2025-02-07 17:07:27,632 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:27,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:27,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:27,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:27,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 17:07:27,722 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 81 statements into 4 equivalence classes. [2025-02-07 17:07:27,951 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 17:07:27,951 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:07:27,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:27,960 WARN L254 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 265 conjuncts are in the unsatisfiable core [2025-02-07 17:07:27,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:28,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:28,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:28,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:29,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:07:29,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229940936] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:29,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:29,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24, 17] total 59 [2025-02-07 17:07:29,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074846167] [2025-02-07 17:07:29,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:29,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-02-07 17:07:29,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:29,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-02-07 17:07:29,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3229, Unknown=0, NotChecked=0, Total=3422 [2025-02-07 17:07:29,623 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:30,939 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2025-02-07 17:07:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 17:07:30,940 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 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 81 [2025-02-07 17:07:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:30,941 INFO L225 Difference]: With dead ends: 149 [2025-02-07 17:07:30,941 INFO L226 Difference]: Without dead ends: 146 [2025-02-07 17:07:30,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=3229, Unknown=0, NotChecked=0, Total=3422 [2025-02-07 17:07:30,942 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2804 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:30,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 179 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2804 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-07 17:07:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-02-07 17:07:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2025-02-07 17:07:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.143884892086331) internal successors, (159), 139 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2025-02-07 17:07:30,980 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 81 [2025-02-07 17:07:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:30,980 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2025-02-07 17:07:30,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2025-02-07 17:07:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-02-07 17:07:30,981 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:30,981 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:30,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-07 17:07:31,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:31,181 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:31,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:31,182 INFO L85 PathProgramCache]: Analyzing trace with hash -888582221, now seen corresponding path program 18 times [2025-02-07 17:07:31,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:31,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42365109] [2025-02-07 17:07:31,182 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:31,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:31,192 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 82 statements into 5 equivalence classes. [2025-02-07 17:07:31,212 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 82 of 82 statements. [2025-02-07 17:07:31,212 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:07:31,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-02-07 17:07:31,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:31,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42365109] [2025-02-07 17:07:31,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42365109] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:31,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427227804] [2025-02-07 17:07:31,475 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:31,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:31,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:31,479 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:31,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 17:07:31,552 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 82 statements into 5 equivalence classes. [2025-02-07 17:07:31,617 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 82 of 82 statements. [2025-02-07 17:07:31,618 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:07:31,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:31,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:07:31,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-02-07 17:07:31,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-02-07 17:07:32,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427227804] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:32,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:32,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2025-02-07 17:07:32,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050821703] [2025-02-07 17:07:32,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:32,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:07:32,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:32,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:07:32,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:07:32,014 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:32,581 INFO L93 Difference]: Finished difference Result 289 states and 335 transitions. [2025-02-07 17:07:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 17:07:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 82 [2025-02-07 17:07:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:32,583 INFO L225 Difference]: With dead ends: 289 [2025-02-07 17:07:32,583 INFO L226 Difference]: Without dead ends: 152 [2025-02-07 17:07:32,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 143 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 17:07:32,584 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:32,584 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 17:07:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-02-07 17:07:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2025-02-07 17:07:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.129251700680272) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2025-02-07 17:07:32,628 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 82 [2025-02-07 17:07:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:32,628 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2025-02-07 17:07:32,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2025-02-07 17:07:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-02-07 17:07:32,629 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:32,629 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:32,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 17:07:32,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:32,830 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:32,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 538100368, now seen corresponding path program 19 times [2025-02-07 17:07:32,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:32,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905122125] [2025-02-07 17:07:32,831 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:32,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:32,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-02-07 17:07:32,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-02-07 17:07:32,847 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:32,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:33,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:33,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905122125] [2025-02-07 17:07:33,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905122125] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:33,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742021539] [2025-02-07 17:07:33,082 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:33,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:33,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:33,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:33,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 17:07:33,150 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-02-07 17:07:33,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-02-07 17:07:33,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:33,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:33,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:07:33,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:33,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:33,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742021539] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:33,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:33,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-02-07 17:07:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973335868] [2025-02-07 17:07:33,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:33,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:07:33,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:33,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:07:33,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:07:33,414 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2025-02-07 17:07:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:33,631 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2025-02-07 17:07:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:07:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) Word has length 83 [2025-02-07 17:07:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:33,633 INFO L225 Difference]: With dead ends: 152 [2025-02-07 17:07:33,633 INFO L226 Difference]: Without dead ends: 93 [2025-02-07 17:07:33,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 143 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:07:33,634 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:33,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 16 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-02-07 17:07:33,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-02-07 17:07:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2025-02-07 17:07:33,664 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 83 [2025-02-07 17:07:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:33,665 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2025-02-07 17:07:33,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2025-02-07 17:07:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2025-02-07 17:07:33,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-02-07 17:07:33,665 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:33,665 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:33,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-07 17:07:33,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:33,866 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:33,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:33,866 INFO L85 PathProgramCache]: Analyzing trace with hash -477115789, now seen corresponding path program 20 times [2025-02-07 17:07:33,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:33,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840440956] [2025-02-07 17:07:33,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:33,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 92 statements into 2 equivalence classes. [2025-02-07 17:07:33,955 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-02-07 17:07:33,959 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:33,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:43,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:43,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840440956] [2025-02-07 17:07:43,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840440956] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:43,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959741613] [2025-02-07 17:07:43,294 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:43,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:43,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:43,296 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:43,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 17:07:43,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 92 statements into 2 equivalence classes. [2025-02-07 17:07:43,421 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-02-07 17:07:43,421 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:43,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:43,427 WARN L254 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 303 conjuncts are in the unsatisfiable core [2025-02-07 17:07:43,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:43,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1