./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:08:45,185 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:08:45,242 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:08:45,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:08:45,249 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:08:45,267 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:08:45,268 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:08:45,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:08:45,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:08:45,269 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:08:45,269 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:08:45,269 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:08:45,270 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:08:45,270 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:08:45,270 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:08:45,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:08:45,271 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:08:45,271 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:08:45,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:08:45,272 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:08:45,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:08:45,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:08:45,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:08:45,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:08:45,272 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:08:45,272 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:08:45,272 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:08:45,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:08:45,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:08:45,273 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:08:45,273 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:08:45,273 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:08:45,273 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 -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2025-02-05 15:08:45,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:08:45,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:08:45,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:08:45,474 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:08:45,475 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:08:45,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2025-02-05 15:08:46,589 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/42fc1743b/a2e487dda1034cab8802ea6001b219a1/FLAGbea21d698 [2025-02-05 15:08:46,808 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:08:46,812 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2025-02-05 15:08:46,817 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/42fc1743b/a2e487dda1034cab8802ea6001b219a1/FLAGbea21d698 [2025-02-05 15:08:47,160 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/42fc1743b/a2e487dda1034cab8802ea6001b219a1 [2025-02-05 15:08:47,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:08:47,163 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:08:47,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:08:47,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:08:47,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:08:47,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1aed7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47, skipping insertion in model container [2025-02-05 15:08:47,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,177 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:08:47,274 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/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2025-02-05 15:08:47,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:08:47,301 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:08:47,308 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/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2025-02-05 15:08:47,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:08:47,327 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:08:47,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47 WrapperNode [2025-02-05 15:08:47,328 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:08:47,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:08:47,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:08:47,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:08:47,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,338 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,353 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2025-02-05 15:08:47,354 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:08:47,355 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:08:47,355 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:08:47,355 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:08:47,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,362 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,376 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 15:08:47,377 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,377 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,380 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,384 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:08:47,385 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:08:47,386 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:08:47,386 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:08:47,386 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (1/1) ... [2025-02-05 15:08:47,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:08:47,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:47,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:08:47,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:08:47,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:08:47,434 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 15:08:47,434 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 15:08:47,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:08:47,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:08:47,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:08:47,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:08:47,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:08:47,478 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:08:47,480 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:08:47,588 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-02-05 15:08:47,588 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:08:47,593 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:08:47,593 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:08:47,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:47 BoogieIcfgContainer [2025-02-05 15:08:47,594 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:08:47,595 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:08:47,595 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:08:47,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:08:47,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:08:47" (1/3) ... [2025-02-05 15:08:47,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29083995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:08:47, skipping insertion in model container [2025-02-05 15:08:47,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:47" (2/3) ... [2025-02-05 15:08:47,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29083995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:08:47, skipping insertion in model container [2025-02-05 15:08:47,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:47" (3/3) ... [2025-02-05 15:08:47,599 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2025-02-05 15:08:47,608 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:08:47,609 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound10.c that has 3 procedures, 35 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 15:08:47,649 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:08:47,658 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;@634554e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:08:47,658 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:08:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-05 15:08:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:08:47,668 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:47,669 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:47,669 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:47,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash 517095282, now seen corresponding path program 1 times [2025-02-05 15:08:47,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:47,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379772027] [2025-02-05 15:08:47,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:47,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:47,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:08:47,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:08:47,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:47,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 15:08:47,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:47,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379772027] [2025-02-05 15:08:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379772027] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:47,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517267421] [2025-02-05 15:08:47,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:47,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:47,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:47,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:47,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:08:47,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:08:47,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:08:47,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:47,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:47,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 15:08:47,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 15:08:47,868 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:47,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517267421] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:47,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:47,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 15:08:47,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605447865] [2025-02-05 15:08:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:47,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:08:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:47,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:08:47,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:08:47,895 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 15:08:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:47,909 INFO L93 Difference]: Finished difference Result 67 states and 108 transitions. [2025-02-05 15:08:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:08:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2025-02-05 15:08:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:47,915 INFO L225 Difference]: With dead ends: 67 [2025-02-05 15:08:47,915 INFO L226 Difference]: Without dead ends: 31 [2025-02-05 15:08:47,917 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:08:47,920 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:47,922 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-05 15:08:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-02-05 15:08:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 15:08:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2025-02-05 15:08:47,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2025-02-05 15:08:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:47,948 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2025-02-05 15:08:47,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 15:08:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2025-02-05 15:08:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 15:08:47,949 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:47,949 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:47,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:08:48,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 15:08:48,150 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:48,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:48,151 INFO L85 PathProgramCache]: Analyzing trace with hash 253254996, now seen corresponding path program 1 times [2025-02-05 15:08:48,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:48,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766469143] [2025-02-05 15:08:48,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:48,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:48,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 15:08:48,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 15:08:48,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:48,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 15:08:48,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:48,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766469143] [2025-02-05 15:08:48,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766469143] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672087026] [2025-02-05 15:08:48,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:48,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:48,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:48,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:48,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:08:48,385 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 15:08:48,403 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 15:08:48,403 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:48,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:48,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 15:08:48,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 15:08:48,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:48,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672087026] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:48,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:48,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2025-02-05 15:08:48,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389487999] [2025-02-05 15:08:48,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:48,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:08:48,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:48,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:08:48,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:08:48,735 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:08:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:48,940 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2025-02-05 15:08:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:08:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 40 [2025-02-05 15:08:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:48,941 INFO L225 Difference]: With dead ends: 52 [2025-02-05 15:08:48,941 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:08:48,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:08:48,942 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:48,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 194 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:08:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2025-02-05 15:08:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2025-02-05 15:08:48,956 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 40 [2025-02-05 15:08:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:48,956 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2025-02-05 15:08:48,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:08:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2025-02-05 15:08:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 15:08:48,958 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:48,958 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:48,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:49,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:49,159 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:49,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:49,160 INFO L85 PathProgramCache]: Analyzing trace with hash -710041082, now seen corresponding path program 1 times [2025-02-05 15:08:49,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:49,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213116107] [2025-02-05 15:08:49,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:49,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:49,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:08:49,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:08:49,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:49,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:49,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020030674] [2025-02-05 15:08:49,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:49,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:49,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:49,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:49,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:08:49,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:08:49,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:08:49,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:49,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:49,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:49,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-05 15:08:49,249 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:49,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:49,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213116107] [2025-02-05 15:08:49,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:49,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020030674] [2025-02-05 15:08:49,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020030674] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:49,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:49,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:49,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146802832] [2025-02-05 15:08:49,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:49,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:49,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:49,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:49,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:49,252 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-05 15:08:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:49,289 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2025-02-05 15:08:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2025-02-05 15:08:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:49,290 INFO L225 Difference]: With dead ends: 62 [2025-02-05 15:08:49,290 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 15:08:49,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:08:49,291 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:49,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 15:08:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2025-02-05 15:08:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-05 15:08:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2025-02-05 15:08:49,304 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 41 [2025-02-05 15:08:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:49,304 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2025-02-05 15:08:49,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-05 15:08:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2025-02-05 15:08:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-05 15:08:49,305 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:49,305 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2025-02-05 15:08:49,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 15:08:49,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:49,505 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:49,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1754206818, now seen corresponding path program 1 times [2025-02-05 15:08:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886418820] [2025-02-05 15:08:49,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:49,511 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-05 15:08:49,528 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 15:08:49,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:49,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:49,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702806998] [2025-02-05 15:08:49,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:49,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:49,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:49,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:49,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:08:49,562 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-05 15:08:49,577 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 15:08:49,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:49,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:49,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:08:49,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-05 15:08:49,640 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:49,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:49,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886418820] [2025-02-05 15:08:49,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:49,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702806998] [2025-02-05 15:08:49,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702806998] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:49,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:49,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:49,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366363124] [2025-02-05 15:08:49,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:49,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:49,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:49,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:49,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:49,642 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 15:08:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:49,685 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2025-02-05 15:08:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2025-02-05 15:08:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:49,687 INFO L225 Difference]: With dead ends: 58 [2025-02-05 15:08:49,688 INFO L226 Difference]: Without dead ends: 56 [2025-02-05 15:08:49,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:08:49,689 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:49,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-05 15:08:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2025-02-05 15:08:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-05 15:08:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2025-02-05 15:08:49,703 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 46 [2025-02-05 15:08:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:49,704 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2025-02-05 15:08:49,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 15:08:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2025-02-05 15:08:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-05 15:08:49,706 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:49,706 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 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, 1, 1] [2025-02-05 15:08:49,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:49,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:49,911 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:49,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash -490653406, now seen corresponding path program 1 times [2025-02-05 15:08:49,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:49,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804459265] [2025-02-05 15:08:49,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:49,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:49,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-05 15:08:49,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 15:08:49,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:49,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:49,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512097056] [2025-02-05 15:08:49,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:49,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:49,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:49,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:49,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:08:49,962 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-05 15:08:49,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 15:08:49,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:49,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:49,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-05 15:08:50,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 15:08:50,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:50,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804459265] [2025-02-05 15:08:50,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512097056] [2025-02-05 15:08:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512097056] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:50,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-02-05 15:08:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565943359] [2025-02-05 15:08:50,262 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:50,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 15:08:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:50,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 15:08:50,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:50,263 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-05 15:08:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:50,360 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2025-02-05 15:08:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2025-02-05 15:08:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:50,364 INFO L225 Difference]: With dead ends: 62 [2025-02-05 15:08:50,364 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 15:08:50,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:08:50,365 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:50,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 15:08:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2025-02-05 15:08:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-05 15:08:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2025-02-05 15:08:50,374 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 56 [2025-02-05 15:08:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:50,374 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2025-02-05 15:08:50,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-05 15:08:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2025-02-05 15:08:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-02-05 15:08:50,375 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:50,375 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:50,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 15:08:50,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:50,576 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:50,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash -801998749, now seen corresponding path program 1 times [2025-02-05 15:08:50,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:50,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19570956] [2025-02-05 15:08:50,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:50,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:50,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-05 15:08:50,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-05 15:08:50,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:50,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:50,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049592367] [2025-02-05 15:08:50,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:50,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:50,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:50,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:50,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:08:50,636 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-05 15:08:50,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-05 15:08:50,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:50,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:50,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:08:50,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-05 15:08:50,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-05 15:08:50,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:50,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19570956] [2025-02-05 15:08:50,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:50,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049592367] [2025-02-05 15:08:50,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049592367] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:50,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:50,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-02-05 15:08:50,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996436859] [2025-02-05 15:08:50,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:50,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:50,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:50,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:50,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:50,803 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-05 15:08:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:50,889 INFO L93 Difference]: Finished difference Result 87 states and 118 transitions. [2025-02-05 15:08:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:50,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 63 [2025-02-05 15:08:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:50,890 INFO L225 Difference]: With dead ends: 87 [2025-02-05 15:08:50,891 INFO L226 Difference]: Without dead ends: 85 [2025-02-05 15:08:50,891 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:50,891 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:50,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 156 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-05 15:08:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2025-02-05 15:08:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2025-02-05 15:08:50,901 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 63 [2025-02-05 15:08:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:50,901 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2025-02-05 15:08:50,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-05 15:08:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2025-02-05 15:08:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-02-05 15:08:50,902 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:50,902 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:50,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:51,102 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,SelfDestructingSolverStorable5 [2025-02-05 15:08:51,103 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:51,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1476647327, now seen corresponding path program 1 times [2025-02-05 15:08:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:51,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589132085] [2025-02-05 15:08:51,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:51,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-02-05 15:08:51,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 15:08:51,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:51,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-05 15:08:51,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:51,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589132085] [2025-02-05 15:08:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589132085] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:51,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315922571] [2025-02-05 15:08:51,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:51,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:51,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:51,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:51,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:08:51,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-02-05 15:08:51,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 15:08:51,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:51,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:51,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:08:51,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-05 15:08:51,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-05 15:08:51,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315922571] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:51,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:51,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-02-05 15:08:51,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369763037] [2025-02-05 15:08:51,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:51,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:08:51,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:51,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:08:51,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:08:51,435 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-05 15:08:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:51,613 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2025-02-05 15:08:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:08:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 65 [2025-02-05 15:08:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:51,615 INFO L225 Difference]: With dead ends: 102 [2025-02-05 15:08:51,615 INFO L226 Difference]: Without dead ends: 94 [2025-02-05 15:08:51,615 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:08:51,616 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:51,616 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 303 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-02-05 15:08:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2025-02-05 15:08:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2025-02-05 15:08:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2025-02-05 15:08:51,631 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2025-02-05 15:08:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:51,631 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2025-02-05 15:08:51,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-05 15:08:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2025-02-05 15:08:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-02-05 15:08:51,635 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:51,635 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:51,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 15:08:51,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:51,836 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:51,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:51,836 INFO L85 PathProgramCache]: Analyzing trace with hash -9888337, now seen corresponding path program 1 times [2025-02-05 15:08:51,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:51,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670500093] [2025-02-05 15:08:51,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:51,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:51,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-02-05 15:08:51,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-02-05 15:08:51,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:51,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:51,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060009795] [2025-02-05 15:08:51,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:51,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:51,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:51,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:51,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:08:51,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-02-05 15:08:51,911 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-02-05 15:08:51,911 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:51,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:51,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 15:08:51,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-05 15:08:52,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:52,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:52,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670500093] [2025-02-05 15:08:52,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:52,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060009795] [2025-02-05 15:08:52,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060009795] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:52,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:52,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-02-05 15:08:52,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102557597] [2025-02-05 15:08:52,036 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:52,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:08:52,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:52,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:08:52,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:52,037 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-02-05 15:08:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:52,131 INFO L93 Difference]: Finished difference Result 120 states and 169 transitions. [2025-02-05 15:08:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:08:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2025-02-05 15:08:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:52,132 INFO L225 Difference]: With dead ends: 120 [2025-02-05 15:08:52,133 INFO L226 Difference]: Without dead ends: 117 [2025-02-05 15:08:52,134 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:52,134 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:52,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 198 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-02-05 15:08:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2025-02-05 15:08:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-02-05 15:08:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2025-02-05 15:08:52,161 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2025-02-05 15:08:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:52,163 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2025-02-05 15:08:52,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-02-05 15:08:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2025-02-05 15:08:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-05 15:08:52,164 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:52,165 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:52,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:52,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:52,366 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:52,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash 537813145, now seen corresponding path program 2 times [2025-02-05 15:08:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925442662] [2025-02-05 15:08:52,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:08:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:52,372 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-02-05 15:08:52,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 15:08:52,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:08:52,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:52,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648829857] [2025-02-05 15:08:52,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:08:52,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:52,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:52,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:52,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 15:08:52,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-02-05 15:08:52,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 15:08:52,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:08:52,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:52,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-05 15:08:52,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-05 15:08:52,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:52,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:52,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925442662] [2025-02-05 15:08:52,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:52,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648829857] [2025-02-05 15:08:52,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648829857] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:52,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:52,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-02-05 15:08:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652933706] [2025-02-05 15:08:52,635 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:52,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:52,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:52,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:52,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:52,636 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 15:08:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:52,744 INFO L93 Difference]: Finished difference Result 126 states and 172 transitions. [2025-02-05 15:08:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2025-02-05 15:08:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:52,745 INFO L225 Difference]: With dead ends: 126 [2025-02-05 15:08:52,745 INFO L226 Difference]: Without dead ends: 124 [2025-02-05 15:08:52,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:52,746 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:52,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 216 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:52,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-02-05 15:08:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2025-02-05 15:08:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-02-05 15:08:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2025-02-05 15:08:52,768 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 76 [2025-02-05 15:08:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:52,768 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2025-02-05 15:08:52,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 15:08:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2025-02-05 15:08:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-05 15:08:52,769 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:52,769 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:52,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 15:08:52,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:52,969 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:52,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:52,970 INFO L85 PathProgramCache]: Analyzing trace with hash -845985745, now seen corresponding path program 3 times [2025-02-05 15:08:52,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:52,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769508185] [2025-02-05 15:08:52,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:08:52,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:52,974 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 81 statements into 6 equivalence classes. [2025-02-05 15:08:52,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 15:08:52,996 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 15:08:52,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:52,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409338737] [2025-02-05 15:08:52,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:08:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:52,998 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:53,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 15:08:53,025 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 81 statements into 6 equivalence classes. [2025-02-05 15:08:53,044 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 50 of 81 statements. [2025-02-05 15:08:53,044 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:08:53,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:53,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-02-05 15:08:53,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-02-05 15:08:53,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:53,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:53,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769508185] [2025-02-05 15:08:53,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:53,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409338737] [2025-02-05 15:08:53,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409338737] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:53,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:53,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-02-05 15:08:53,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422364487] [2025-02-05 15:08:53,784 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:53,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:08:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:53,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:08:53,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:08:53,785 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2025-02-05 15:08:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:54,096 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2025-02-05 15:08:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:08:54,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2025-02-05 15:08:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:54,098 INFO L225 Difference]: With dead ends: 134 [2025-02-05 15:08:54,098 INFO L226 Difference]: Without dead ends: 132 [2025-02-05 15:08:54,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:08:54,099 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:54,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 197 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:08:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-05 15:08:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2025-02-05 15:08:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 73 states have (on average 1.178082191780822) internal successors, (86), 75 states have internal predecessors, (86), 45 states have call successors, (45), 11 states have call predecessors, (45), 11 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-02-05 15:08:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 174 transitions. [2025-02-05 15:08:54,132 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 174 transitions. Word has length 81 [2025-02-05 15:08:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:54,132 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 174 transitions. [2025-02-05 15:08:54,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2025-02-05 15:08:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 174 transitions. [2025-02-05 15:08:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-02-05 15:08:54,133 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:54,133 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:54,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:54,338 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,SelfDestructingSolverStorable9 [2025-02-05 15:08:54,338 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:54,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1133840962, now seen corresponding path program 1 times [2025-02-05 15:08:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:54,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409065372] [2025-02-05 15:08:54,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:54,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:54,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-02-05 15:08:54,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-02-05 15:08:54,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:54,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926053588] [2025-02-05 15:08:54,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:54,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:54,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:54,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 15:08:54,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-02-05 15:08:54,413 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-02-05 15:08:54,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:54,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:54,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-05 15:08:54,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2025-02-05 15:08:54,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-02-05 15:08:55,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:55,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409065372] [2025-02-05 15:08:55,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:55,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926053588] [2025-02-05 15:08:55,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926053588] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:55,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:55,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-02-05 15:08:55,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623304830] [2025-02-05 15:08:55,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:55,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:08:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:55,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:08:55,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:08:55,112 INFO L87 Difference]: Start difference. First operand 130 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-02-05 15:08:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:56,637 INFO L93 Difference]: Finished difference Result 230 states and 337 transitions. [2025-02-05 15:08:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 15:08:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2025-02-05 15:08:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:56,643 INFO L225 Difference]: With dead ends: 230 [2025-02-05 15:08:56,643 INFO L226 Difference]: Without dead ends: 226 [2025-02-05 15:08:56,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 15:08:56,644 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 74 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:56,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 592 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-05 15:08:56,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2025-02-05 15:08:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2025-02-05 15:08:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 118 states have internal predecessors, (142), 94 states have call successors, (94), 13 states have call predecessors, (94), 13 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2025-02-05 15:08:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2025-02-05 15:08:56,696 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 87 [2025-02-05 15:08:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:56,696 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2025-02-05 15:08:56,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-02-05 15:08:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2025-02-05 15:08:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-02-05 15:08:56,697 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:56,697 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:56,703 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 [2025-02-05 15:08:56,902 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,SelfDestructingSolverStorable10 [2025-02-05 15:08:56,902 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:56,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash -692096254, now seen corresponding path program 4 times [2025-02-05 15:08:56,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:56,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266535727] [2025-02-05 15:08:56,903 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:08:56,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:56,907 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 96 statements into 2 equivalence classes. [2025-02-05 15:08:56,915 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 91 of 96 statements. [2025-02-05 15:08:56,916 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:08:56,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-02-05 15:08:56,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:56,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266535727] [2025-02-05 15:08:56,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266535727] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:56,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:56,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:56,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763600743] [2025-02-05 15:08:56,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:56,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:56,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:56,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:56,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:56,982 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-02-05 15:08:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:57,082 INFO L93 Difference]: Finished difference Result 276 states and 404 transitions. [2025-02-05 15:08:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:08:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2025-02-05 15:08:57,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:57,084 INFO L225 Difference]: With dead ends: 276 [2025-02-05 15:08:57,084 INFO L226 Difference]: Without dead ends: 202 [2025-02-05 15:08:57,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:57,085 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:57,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-02-05 15:08:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 190. [2025-02-05 15:08:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 101 states have internal predecessors, (115), 78 states have call successors, (78), 13 states have call predecessors, (78), 13 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2025-02-05 15:08:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 269 transitions. [2025-02-05 15:08:57,127 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 269 transitions. Word has length 96 [2025-02-05 15:08:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:57,128 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 269 transitions. [2025-02-05 15:08:57,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-02-05 15:08:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 269 transitions. [2025-02-05 15:08:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-02-05 15:08:57,130 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:57,130 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:57,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-05 15:08:57,130 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:57,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash -298205812, now seen corresponding path program 1 times [2025-02-05 15:08:57,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:57,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046713574] [2025-02-05 15:08:57,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:57,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:57,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-02-05 15:08:57,157 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-02-05 15:08:57,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:57,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:57,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486402579] [2025-02-05 15:08:57,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:57,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:57,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:57,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:57,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 15:08:57,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-02-05 15:08:57,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-02-05 15:08:57,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:57,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:57,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-05 15:08:57,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-02-05 15:08:58,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:58,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:58,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046713574] [2025-02-05 15:08:58,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:58,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486402579] [2025-02-05 15:08:58,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486402579] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:58,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:58,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-02-05 15:08:58,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382024471] [2025-02-05 15:08:58,554 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:58,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:08:58,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:58,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:08:58,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:08:58,555 INFO L87 Difference]: Start difference. First operand 190 states and 269 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-02-05 15:08:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:59,179 INFO L93 Difference]: Finished difference Result 202 states and 279 transitions. [2025-02-05 15:08:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:08:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 103 [2025-02-05 15:08:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:59,181 INFO L225 Difference]: With dead ends: 202 [2025-02-05 15:08:59,181 INFO L226 Difference]: Without dead ends: 200 [2025-02-05 15:08:59,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:08:59,182 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:59,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 303 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 15:08:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-02-05 15:08:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 176. [2025-02-05 15:08:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 97 states have internal predecessors, (108), 69 states have call successors, (69), 13 states have call predecessors, (69), 13 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2025-02-05 15:08:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 244 transitions. [2025-02-05 15:08:59,225 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 244 transitions. Word has length 103 [2025-02-05 15:08:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:59,225 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 244 transitions. [2025-02-05 15:08:59,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-02-05 15:08:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 244 transitions. [2025-02-05 15:08:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-02-05 15:08:59,226 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:59,226 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:59,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-05 15:08:59,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:59,427 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:59,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:59,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1248935735, now seen corresponding path program 1 times [2025-02-05 15:08:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:59,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325451413] [2025-02-05 15:08:59,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:59,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:59,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-02-05 15:08:59,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-02-05 15:08:59,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:59,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-02-05 15:08:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325451413] [2025-02-05 15:08:59,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325451413] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273916172] [2025-02-05 15:08:59,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:59,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:59,562 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:59,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 15:08:59,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-02-05 15:08:59,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-02-05 15:08:59,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:59,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:59,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:59,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2025-02-05 15:08:59,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-02-05 15:08:59,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273916172] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:59,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:59,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2025-02-05 15:08:59,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345705648] [2025-02-05 15:08:59,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:59,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:59,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:59,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:59,715 INFO L87 Difference]: Start difference. First operand 176 states and 244 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-02-05 15:08:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:59,881 INFO L93 Difference]: Finished difference Result 206 states and 286 transitions. [2025-02-05 15:08:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:08:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 117 [2025-02-05 15:08:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:59,883 INFO L225 Difference]: With dead ends: 206 [2025-02-05 15:08:59,883 INFO L226 Difference]: Without dead ends: 194 [2025-02-05 15:08:59,883 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 231 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:08:59,884 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:59,884 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 325 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2025-02-05 15:08:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 164. [2025-02-05 15:08:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 88 states have internal predecessors, (100), 65 states have call successors, (65), 12 states have call predecessors, (65), 12 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2025-02-05 15:08:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2025-02-05 15:08:59,925 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 117 [2025-02-05 15:08:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:59,925 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2025-02-05 15:08:59,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-02-05 15:08:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2025-02-05 15:08:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-02-05 15:08:59,926 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:59,926 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:59,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-05 15:09:00,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:00,127 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:00,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:00,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2085521313, now seen corresponding path program 2 times [2025-02-05 15:09:00,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:00,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678592352] [2025-02-05 15:09:00,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:00,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:00,132 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-02-05 15:09:00,144 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-02-05 15:09:00,144 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:00,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:00,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132616042] [2025-02-05 15:09:00,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:00,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:00,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:00,152 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:00,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 15:09:00,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-02-05 15:09:00,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-02-05 15:09:00,213 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:00,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:00,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-02-05 15:09:00,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 61 proven. 50 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2025-02-05 15:09:00,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2025-02-05 15:09:00,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:00,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678592352] [2025-02-05 15:09:00,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:00,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132616042] [2025-02-05 15:09:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132616042] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:00,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:00,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-02-05 15:09:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664071736] [2025-02-05 15:09:00,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:00,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:09:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:00,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:09:00,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:09:00,779 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 19 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-02-05 15:09:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:01,922 INFO L93 Difference]: Finished difference Result 219 states and 309 transitions. [2025-02-05 15:09:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-05 15:09:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 19 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 118 [2025-02-05 15:09:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:01,925 INFO L225 Difference]: With dead ends: 219 [2025-02-05 15:09:01,925 INFO L226 Difference]: Without dead ends: 216 [2025-02-05 15:09:01,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 15:09:01,926 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 60 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:01,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 572 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 15:09:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2025-02-05 15:09:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2025-02-05 15:09:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 90 states have internal predecessors, (103), 63 states have call successors, (63), 13 states have call predecessors, (63), 13 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2025-02-05 15:09:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 228 transitions. [2025-02-05 15:09:01,975 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 228 transitions. Word has length 118 [2025-02-05 15:09:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:01,976 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 228 transitions. [2025-02-05 15:09:01,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 19 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-02-05 15:09:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 228 transitions. [2025-02-05 15:09:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-02-05 15:09:01,977 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:01,977 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:01,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 15:09:02,177 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,SelfDestructingSolverStorable14 [2025-02-05 15:09:02,178 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:02,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1601006241, now seen corresponding path program 3 times [2025-02-05 15:09:02,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:02,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484674398] [2025-02-05 15:09:02,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:09:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:02,183 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 120 statements into 7 equivalence classes. [2025-02-05 15:09:02,206 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 120 statements. [2025-02-05 15:09:02,206 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 15:09:02,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914072002] [2025-02-05 15:09:02,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:09:02,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:02,211 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:02,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 15:09:02,254 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 120 statements into 7 equivalence classes. [2025-02-05 15:09:02,275 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 79 of 120 statements. [2025-02-05 15:09:02,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 15:09:02,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:02,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-05 15:09:02,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 41 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2025-02-05 15:09:02,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:02,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484674398] [2025-02-05 15:09:02,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914072002] [2025-02-05 15:09:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914072002] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:02,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:09:02,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2025-02-05 15:09:02,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625189702] [2025-02-05 15:09:02,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:02,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:09:02,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:02,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:09:02,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:09:02,601 INFO L87 Difference]: Start difference. First operand 166 states and 228 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-02-05 15:09:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:02,775 INFO L93 Difference]: Finished difference Result 182 states and 241 transitions. [2025-02-05 15:09:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:09:02,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 120 [2025-02-05 15:09:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:02,776 INFO L225 Difference]: With dead ends: 182 [2025-02-05 15:09:02,776 INFO L226 Difference]: Without dead ends: 180 [2025-02-05 15:09:02,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:09:02,777 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:02,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 203 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:09:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2025-02-05 15:09:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2025-02-05 15:09:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 99 states have internal predecessors, (112), 63 states have call successors, (63), 16 states have call predecessors, (63), 16 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2025-02-05 15:09:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 237 transitions. [2025-02-05 15:09:02,818 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 237 transitions. Word has length 120 [2025-02-05 15:09:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:02,818 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 237 transitions. [2025-02-05 15:09:02,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-02-05 15:09:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 237 transitions. [2025-02-05 15:09:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2025-02-05 15:09:02,819 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:02,819 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:02,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-05 15:09:03,022 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,SelfDestructingSolverStorable15 [2025-02-05 15:09:03,023 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:03,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash -918342679, now seen corresponding path program 4 times [2025-02-05 15:09:03,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:03,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015798919] [2025-02-05 15:09:03,023 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:09:03,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:03,028 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 123 statements into 2 equivalence classes. [2025-02-05 15:09:03,046 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 123 of 123 statements. [2025-02-05 15:09:03,046 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 15:09:03,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:03,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346498815] [2025-02-05 15:09:03,047 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:09:03,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:03,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:03,053 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:03,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 15:09:03,081 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 123 statements into 2 equivalence classes. [2025-02-05 15:09:03,109 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 118 of 123 statements. [2025-02-05 15:09:03,109 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:09:03,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:03,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-02-05 15:09:03,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 57 proven. 47 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2025-02-05 15:09:03,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:04,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015798919] [2025-02-05 15:09:04,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346498815] [2025-02-05 15:09:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346498815] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:04,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:09:04,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-02-05 15:09:04,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296718967] [2025-02-05 15:09:04,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:04,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 15:09:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:04,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 15:09:04,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2025-02-05 15:09:04,145 INFO L87 Difference]: Start difference. First operand 178 states and 237 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-05 15:09:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:04,576 INFO L93 Difference]: Finished difference Result 241 states and 324 transitions. [2025-02-05 15:09:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:09:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 123 [2025-02-05 15:09:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:04,578 INFO L225 Difference]: With dead ends: 241 [2025-02-05 15:09:04,578 INFO L226 Difference]: Without dead ends: 239 [2025-02-05 15:09:04,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2025-02-05 15:09:04,579 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 24 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:04,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 424 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:09:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2025-02-05 15:09:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2025-02-05 15:09:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 128 states have (on average 1.140625) internal successors, (146), 129 states have internal predecessors, (146), 87 states have call successors, (87), 20 states have call predecessors, (87), 20 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2025-02-05 15:09:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 319 transitions. [2025-02-05 15:09:04,646 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 319 transitions. Word has length 123 [2025-02-05 15:09:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:04,646 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 319 transitions. [2025-02-05 15:09:04,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-05 15:09:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 319 transitions. [2025-02-05 15:09:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2025-02-05 15:09:04,647 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:04,647 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:04,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-05 15:09:04,851 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,SelfDestructingSolverStorable16 [2025-02-05 15:09:04,851 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:04,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash 225386281, now seen corresponding path program 5 times [2025-02-05 15:09:04,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:04,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725102175] [2025-02-05 15:09:04,855 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:09:04,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:04,859 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 125 statements into 7 equivalence classes. [2025-02-05 15:09:04,879 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 125 of 125 statements. [2025-02-05 15:09:04,879 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-05 15:09:04,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:04,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39205792] [2025-02-05 15:09:04,881 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:09:04,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:04,884 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:04,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 15:09:04,915 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 125 statements into 7 equivalence classes. [2025-02-05 15:09:04,953 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 125 of 125 statements. [2025-02-05 15:09:04,953 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-05 15:09:04,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:04,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-02-05 15:09:04,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 81 proven. 92 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-02-05 15:09:05,567 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:15,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:15,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725102175] [2025-02-05 15:09:15,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:15,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39205792] [2025-02-05 15:09:15,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39205792] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:15,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:09:15,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-02-05 15:09:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908740933] [2025-02-05 15:09:15,345 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:15,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 15:09:15,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:15,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 15:09:15,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=451, Unknown=1, NotChecked=0, Total=552 [2025-02-05 15:09:15,347 INFO L87 Difference]: Start difference. First operand 236 states and 319 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2025-02-05 15:09:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:16,381 INFO L93 Difference]: Finished difference Result 281 states and 373 transitions. [2025-02-05 15:09:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 15:09:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 125 [2025-02-05 15:09:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:16,383 INFO L225 Difference]: With dead ends: 281 [2025-02-05 15:09:16,384 INFO L226 Difference]: Without dead ends: 279 [2025-02-05 15:09:16,384 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=150, Invalid=661, Unknown=1, NotChecked=0, Total=812 [2025-02-05 15:09:16,384 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:16,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 413 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:09:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2025-02-05 15:09:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2025-02-05 15:09:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 152 states have (on average 1.131578947368421) internal successors, (172), 153 states have internal predecessors, (172), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2025-02-05 15:09:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 369 transitions. [2025-02-05 15:09:16,451 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 369 transitions. Word has length 125 [2025-02-05 15:09:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:16,451 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 369 transitions. [2025-02-05 15:09:16,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2025-02-05 15:09:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 369 transitions. [2025-02-05 15:09:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2025-02-05 15:09:16,452 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:16,452 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:16,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-05 15:09:16,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 15:09:16,652 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:16,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:16,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1542325983, now seen corresponding path program 6 times [2025-02-05 15:09:16,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:16,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751325087] [2025-02-05 15:09:16,653 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:09:16,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:16,657 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 128 statements into 6 equivalence classes. [2025-02-05 15:09:16,673 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 128 of 128 statements. [2025-02-05 15:09:16,673 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-05 15:09:16,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:16,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593242517] [2025-02-05 15:09:16,674 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:09:16,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:16,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:16,676 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:16,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 15:09:16,710 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 128 statements into 6 equivalence classes. [2025-02-05 15:09:16,787 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 103 of 128 statements. [2025-02-05 15:09:16,788 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 15:09:16,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:16,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-02-05 15:09:16,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 82 proven. 66 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2025-02-05 15:09:17,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:17,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:17,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751325087] [2025-02-05 15:09:17,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:17,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593242517] [2025-02-05 15:09:17,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593242517] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:17,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:09:17,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-02-05 15:09:17,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839675443] [2025-02-05 15:09:17,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:17,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:09:17,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:17,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:09:17,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:09:17,890 INFO L87 Difference]: Start difference. First operand 277 states and 369 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2025-02-05 15:09:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:18,339 INFO L93 Difference]: Finished difference Result 298 states and 386 transitions. [2025-02-05 15:09:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:09:18,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 128 [2025-02-05 15:09:18,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:18,341 INFO L225 Difference]: With dead ends: 298 [2025-02-05 15:09:18,341 INFO L226 Difference]: Without dead ends: 296 [2025-02-05 15:09:18,341 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:09:18,341 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:18,341 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 546 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:09:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2025-02-05 15:09:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 260. [2025-02-05 15:09:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 146 states have (on average 1.1232876712328768) internal successors, (164), 147 states have internal predecessors, (164), 87 states have call successors, (87), 26 states have call predecessors, (87), 26 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2025-02-05 15:09:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 337 transitions. [2025-02-05 15:09:18,410 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 337 transitions. Word has length 128 [2025-02-05 15:09:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:18,410 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 337 transitions. [2025-02-05 15:09:18,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2025-02-05 15:09:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 337 transitions. [2025-02-05 15:09:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2025-02-05 15:09:18,411 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:18,411 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:18,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-05 15:09:18,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:18,612 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:18,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash -578293650, now seen corresponding path program 2 times [2025-02-05 15:09:18,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:18,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720637192] [2025-02-05 15:09:18,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:18,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:18,617 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 134 statements into 2 equivalence classes. [2025-02-05 15:09:18,630 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 134 of 134 statements. [2025-02-05 15:09:18,630 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:18,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:18,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763957321] [2025-02-05 15:09:18,631 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:18,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:18,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:18,636 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:18,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 15:09:18,667 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 134 statements into 2 equivalence classes. [2025-02-05 15:09:18,703 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 134 of 134 statements. [2025-02-05 15:09:18,703 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:18,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:18,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-05 15:09:18,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-02-05 15:09:19,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-02-05 15:09:20,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:20,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720637192] [2025-02-05 15:09:20,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:20,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763957321] [2025-02-05 15:09:20,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763957321] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:20,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:20,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2025-02-05 15:09:20,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816512906] [2025-02-05 15:09:20,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:20,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 15:09:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:20,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 15:09:20,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:09:20,129 INFO L87 Difference]: Start difference. First operand 260 states and 337 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2025-02-05 15:09:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:24,519 INFO L93 Difference]: Finished difference Result 342 states and 463 transitions. [2025-02-05 15:09:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-05 15:09:24,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) Word has length 134 [2025-02-05 15:09:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:24,522 INFO L225 Difference]: With dead ends: 342 [2025-02-05 15:09:24,522 INFO L226 Difference]: Without dead ends: 338 [2025-02-05 15:09:24,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=534, Invalid=2118, Unknown=0, NotChecked=0, Total=2652 [2025-02-05 15:09:24,523 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 91 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:24,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 897 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2025-02-05 15:09:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2025-02-05 15:09:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 320. [2025-02-05 15:09:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 172 states have internal predecessors, (195), 119 states have call successors, (119), 29 states have call predecessors, (119), 29 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2025-02-05 15:09:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 432 transitions. [2025-02-05 15:09:24,649 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 432 transitions. Word has length 134 [2025-02-05 15:09:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:24,650 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 432 transitions. [2025-02-05 15:09:24,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2025-02-05 15:09:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 432 transitions. [2025-02-05 15:09:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2025-02-05 15:09:24,650 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:24,650 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:24,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-05 15:09:24,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:24,851 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:24,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -355687162, now seen corresponding path program 7 times [2025-02-05 15:09:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:24,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911821863] [2025-02-05 15:09:24,851 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:09:24,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:24,855 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 145 statements into 1 equivalence classes. [2025-02-05 15:09:24,863 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 145 of 145 statements. [2025-02-05 15:09:24,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:09:24,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:24,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486849744] [2025-02-05 15:09:24,864 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:09:24,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:24,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:24,865 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) [2025-02-05 15:09:24,867 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 [2025-02-05 15:09:24,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 145 statements into 1 equivalence classes. [2025-02-05 15:09:24,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 145 of 145 statements. [2025-02-05 15:09:24,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:09:24,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:24,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-02-05 15:09:24,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 83 proven. 78 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2025-02-05 15:09:25,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 87 proven. 59 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2025-02-05 15:09:26,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911821863] [2025-02-05 15:09:26,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486849744] [2025-02-05 15:09:26,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486849744] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:26,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:26,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2025-02-05 15:09:26,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620161621] [2025-02-05 15:09:26,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:26,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 15:09:26,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:26,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 15:09:26,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2025-02-05 15:09:26,389 INFO L87 Difference]: Start difference. First operand 320 states and 432 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) [2025-02-05 15:09:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:28,146 INFO L93 Difference]: Finished difference Result 407 states and 557 transitions. [2025-02-05 15:09:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-05 15:09:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) Word has length 145 [2025-02-05 15:09:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:28,149 INFO L225 Difference]: With dead ends: 407 [2025-02-05 15:09:28,149 INFO L226 Difference]: Without dead ends: 405 [2025-02-05 15:09:28,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=499, Invalid=1951, Unknown=0, NotChecked=0, Total=2450 [2025-02-05 15:09:28,150 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:28,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 572 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 15:09:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2025-02-05 15:09:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 338. [2025-02-05 15:09:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 184 states have (on average 1.1358695652173914) internal successors, (209), 186 states have internal predecessors, (209), 122 states have call successors, (122), 31 states have call predecessors, (122), 31 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) [2025-02-05 15:09:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 452 transitions. [2025-02-05 15:09:28,315 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 452 transitions. Word has length 145 [2025-02-05 15:09:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:28,315 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 452 transitions. [2025-02-05 15:09:28,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) [2025-02-05 15:09:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 452 transitions. [2025-02-05 15:09:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2025-02-05 15:09:28,316 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:28,316 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:28,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-05 15:09:28,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:28,521 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:28,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash -228541178, now seen corresponding path program 8 times [2025-02-05 15:09:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709539316] [2025-02-05 15:09:28,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:28,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:28,526 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 147 statements into 2 equivalence classes. [2025-02-05 15:09:28,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 147 of 147 statements. [2025-02-05 15:09:28,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:28,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:28,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612525830] [2025-02-05 15:09:28,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:28,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:28,540 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:28,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-05 15:09:28,568 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 147 statements into 2 equivalence classes. [2025-02-05 15:09:28,592 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 147 of 147 statements. [2025-02-05 15:09:28,592 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:28,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:28,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-02-05 15:09:28,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 132 proven. 66 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2025-02-05 15:09:29,308 INFO L312 TraceCheckSpWp]: Computing backward predicates...