./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 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/hard-u_unwindbound5.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 082e5acb2a505af9e43ec1a894890509a127a32d8ecd4c5193a456bddcb0f4a3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 03:28:42,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:28:42,255 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:28:42,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:28:42,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:28:42,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:28:42,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:28:42,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:28:42,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:28:42,282 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:28:42,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:28:42,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:28:42,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:28:42,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:28:42,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:28:42,283 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:28:42,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:28:42,284 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:28:42,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:28:42,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:28:42,284 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 -> 082e5acb2a505af9e43ec1a894890509a127a32d8ecd4c5193a456bddcb0f4a3 [2025-01-09 03:28:42,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:28:42,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:28:42,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:28:42,526 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:28:42,526 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:28:42,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2025-01-09 03:28:43,729 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5669ca6c5/b1357b595ca0449390b82e147c27de72/FLAG73d25366d [2025-01-09 03:28:43,980 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:28:43,980 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2025-01-09 03:28:43,986 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5669ca6c5/b1357b595ca0449390b82e147c27de72/FLAG73d25366d [2025-01-09 03:28:43,997 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5669ca6c5/b1357b595ca0449390b82e147c27de72 [2025-01-09 03:28:44,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:28:44,015 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:28:44,016 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:28:44,017 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:28:44,020 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:28:44,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11af817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44, skipping insertion in model container [2025-01-09 03:28:44,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,032 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:28:44,124 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/hard-u_unwindbound5.c[537,550] [2025-01-09 03:28:44,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:28:44,143 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:28:44,152 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/hard-u_unwindbound5.c[537,550] [2025-01-09 03:28:44,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:28:44,169 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:28:44,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44 WrapperNode [2025-01-09 03:28:44,171 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:28:44,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:28:44,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:28:44,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:28:44,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,181 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,191 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2025-01-09 03:28:44,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:28:44,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:28:44,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:28:44,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:28:44,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,199 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,207 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]. [2025-01-09 03:28:44,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,207 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,209 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,211 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,217 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,217 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,218 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:28:44,218 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:28:44,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:28:44,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:28:44,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (1/1) ... [2025-01-09 03:28:44,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:28:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:28:44,242 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) [2025-01-09 03:28:44,244 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 [2025-01-09 03:28:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:28:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:28:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:28:44,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:28:44,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 03:28:44,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 03:28:44,304 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:28:44,305 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:28:44,383 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-01-09 03:28:44,383 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:28:44,389 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:28:44,389 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-01-09 03:28:44,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:28:44 BoogieIcfgContainer [2025-01-09 03:28:44,390 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:28:44,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:28:44,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:28:44,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:28:44,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:28:44" (1/3) ... [2025-01-09 03:28:44,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d15b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:28:44, skipping insertion in model container [2025-01-09 03:28:44,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:28:44" (2/3) ... [2025-01-09 03:28:44,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d15b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:28:44, skipping insertion in model container [2025-01-09 03:28:44,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:28:44" (3/3) ... [2025-01-09 03:28:44,396 INFO L128 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2025-01-09 03:28:44,404 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:28:44,405 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-u_unwindbound5.c that has 2 procedures, 28 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 03:28:44,434 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:28:44,441 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;@389de7ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:28:44,441 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:28:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-09 03:28:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-09 03:28:44,447 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:44,448 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:44,448 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:44,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2025-01-09 03:28:44,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:44,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9264515] [2025-01-09 03:28:44,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:44,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:44,497 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 03:28:44,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 03:28:44,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:44,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:28:44,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:28:44,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9264515] [2025-01-09 03:28:44,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9264515] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:28:44,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:28:44,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 03:28:44,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507949788] [2025-01-09 03:28:44,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:28:44,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 03:28:44,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:28:44,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 03:28:44,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:28:44,547 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:28:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:28:44,557 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2025-01-09 03:28:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 03:28:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-09 03:28:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:28:44,561 INFO L225 Difference]: With dead ends: 53 [2025-01-09 03:28:44,561 INFO L226 Difference]: Without dead ends: 24 [2025-01-09 03:28:44,563 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:28:44,565 INFO L435 NwaCegarLoop]: 38 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, 38 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 [2025-01-09 03:28:44,565 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:28:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-01-09 03:28:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-01-09 03:28:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:28:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2025-01-09 03:28:44,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2025-01-09 03:28:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:28:44,585 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2025-01-09 03:28:44,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:28:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2025-01-09 03:28:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-09 03:28:44,585 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:44,585 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:44,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 03:28:44,586 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:44,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2015332289, now seen corresponding path program 1 times [2025-01-09 03:28:44,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:44,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19921820] [2025-01-09 03:28:44,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:44,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:44,595 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 03:28:44,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 03:28:44,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:44,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:28:44,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:28:44,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19921820] [2025-01-09 03:28:44,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19921820] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:28:44,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:28:44,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:28:44,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673586602] [2025-01-09 03:28:44,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:28:44,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:28:44,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:28:44,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:28:44,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:28:44,760 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:28:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:28:44,829 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2025-01-09 03:28:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:28:44,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-09 03:28:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:28:44,833 INFO L225 Difference]: With dead ends: 38 [2025-01-09 03:28:44,833 INFO L226 Difference]: Without dead ends: 36 [2025-01-09 03:28:44,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:28:44,834 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:28:44,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:28:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-01-09 03:28:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2025-01-09 03:28:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:28:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-01-09 03:28:44,844 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2025-01-09 03:28:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:28:44,844 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-01-09 03:28:44,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:28:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-01-09 03:28:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-01-09 03:28:44,845 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:44,845 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:44,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 03:28:44,845 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:44,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:44,849 INFO L85 PathProgramCache]: Analyzing trace with hash 902164894, now seen corresponding path program 1 times [2025-01-09 03:28:44,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:44,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241487290] [2025-01-09 03:28:44,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:44,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:44,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-09 03:28:44,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 03:28:44,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:44,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:28:44,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:28:44,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241487290] [2025-01-09 03:28:44,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241487290] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:28:44,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:28:44,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 03:28:44,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050053732] [2025-01-09 03:28:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:28:44,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 03:28:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:28:44,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 03:28:44,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:28:44,930 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:28:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:28:44,951 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2025-01-09 03:28:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:28:44,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-01-09 03:28:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:28:44,954 INFO L225 Difference]: With dead ends: 44 [2025-01-09 03:28:44,954 INFO L226 Difference]: Without dead ends: 30 [2025-01-09 03:28:44,954 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:28:44,954 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:28:44,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:28:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-01-09 03:28:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-01-09 03:28:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:28:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2025-01-09 03:28:44,962 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2025-01-09 03:28:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:28:44,962 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2025-01-09 03:28:44,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:28:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2025-01-09 03:28:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-09 03:28:44,962 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:44,962 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:44,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 03:28:44,962 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:44,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:44,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1435955584, now seen corresponding path program 1 times [2025-01-09 03:28:44,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:44,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242361274] [2025-01-09 03:28:44,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:44,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:44,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 03:28:44,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 03:28:44,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:44,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:28:45,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:28:45,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242361274] [2025-01-09 03:28:45,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242361274] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:28:45,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:28:45,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:28:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687025268] [2025-01-09 03:28:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:28:45,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:28:45,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:28:45,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:28:45,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:28:45,147 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 03:28:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:28:45,220 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2025-01-09 03:28:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:28:45,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-01-09 03:28:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:28:45,222 INFO L225 Difference]: With dead ends: 44 [2025-01-09 03:28:45,222 INFO L226 Difference]: Without dead ends: 42 [2025-01-09 03:28:45,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:28:45,222 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:28:45,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:28:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-01-09 03:28:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2025-01-09 03:28:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:28:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2025-01-09 03:28:45,231 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2025-01-09 03:28:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:28:45,232 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2025-01-09 03:28:45,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 03:28:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2025-01-09 03:28:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-09 03:28:45,232 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:45,232 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:45,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 03:28:45,232 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:45,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1121341599, now seen corresponding path program 1 times [2025-01-09 03:28:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909108848] [2025-01-09 03:28:45,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:45,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 03:28:45,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 03:28:45,252 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:45,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:28:45,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554206436] [2025-01-09 03:28:45,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:45,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:28:45,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:28:45,257 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) [2025-01-09 03:28:45,261 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 [2025-01-09 03:28:45,288 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 03:28:45,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 03:28:45,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:45,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:45,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 03:28:45,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:28:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:28:45,471 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:28:45,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:28:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909108848] [2025-01-09 03:28:45,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:28:45,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554206436] [2025-01-09 03:28:45,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554206436] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:28:45,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:28:45,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-09 03:28:45,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048152312] [2025-01-09 03:28:45,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:28:45,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 03:28:45,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:28:45,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 03:28:45,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:28:45,475 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:28:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:28:45,570 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2025-01-09 03:28:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 03:28:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2025-01-09 03:28:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:28:45,572 INFO L225 Difference]: With dead ends: 63 [2025-01-09 03:28:45,572 INFO L226 Difference]: Without dead ends: 48 [2025-01-09 03:28:45,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:28:45,573 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:28:45,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 129 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:28:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-01-09 03:28:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-01-09 03:28:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-01-09 03:28:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2025-01-09 03:28:45,579 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2025-01-09 03:28:45,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:28:45,580 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2025-01-09 03:28:45,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:28:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2025-01-09 03:28:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 03:28:45,580 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:45,580 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:45,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 03:28:45,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:28:45,785 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:45,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1012149342, now seen corresponding path program 1 times [2025-01-09 03:28:45,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886170528] [2025-01-09 03:28:45,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:45,793 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 03:28:45,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 03:28:45,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:45,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:28:45,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572971018] [2025-01-09 03:28:45,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:28:45,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:28:45,809 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) [2025-01-09 03:28:45,810 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 [2025-01-09 03:28:45,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 03:28:45,848 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 03:28:45,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:45,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:45,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 03:28:45,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:28:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:28:46,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:28:46,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:28:46,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886170528] [2025-01-09 03:28:46,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:28:46,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572971018] [2025-01-09 03:28:46,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572971018] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:28:46,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:28:46,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2025-01-09 03:28:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536736883] [2025-01-09 03:28:46,345 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:28:46,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 03:28:46,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:28:46,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 03:28:46,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-01-09 03:28:46,345 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 03:28:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:28:46,530 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2025-01-09 03:28:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 03:28:46,531 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2025-01-09 03:28:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:28:46,532 INFO L225 Difference]: With dead ends: 64 [2025-01-09 03:28:46,532 INFO L226 Difference]: Without dead ends: 50 [2025-01-09 03:28:46,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2025-01-09 03:28:46,533 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:28:46,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 157 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:28:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-01-09 03:28:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-01-09 03:28:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-01-09 03:28:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2025-01-09 03:28:46,544 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 28 [2025-01-09 03:28:46,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:28:46,544 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2025-01-09 03:28:46,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 03:28:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2025-01-09 03:28:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-09 03:28:46,545 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:46,545 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:46,552 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 [2025-01-09 03:28:46,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:28:46,745 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:46,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:46,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2060763589, now seen corresponding path program 1 times [2025-01-09 03:28:46,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:46,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119814800] [2025-01-09 03:28:46,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:46,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:46,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 03:28:46,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 03:28:46,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:46,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 03:28:46,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:28:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119814800] [2025-01-09 03:28:46,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119814800] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:28:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028426275] [2025-01-09 03:28:46,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:46,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:28:46,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:28:46,801 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) [2025-01-09 03:28:46,803 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 [2025-01-09 03:28:46,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 03:28:46,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 03:28:46,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:46,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:46,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 03:28:46,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:28:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 03:28:46,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:28:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 03:28:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028426275] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:28:46,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:28:46,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2025-01-09 03:28:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726158626] [2025-01-09 03:28:46,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:28:46,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 03:28:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:28:46,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 03:28:46,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:28:46,900 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-09 03:28:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:28:46,991 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2025-01-09 03:28:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 03:28:46,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2025-01-09 03:28:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:28:46,992 INFO L225 Difference]: With dead ends: 115 [2025-01-09 03:28:46,992 INFO L226 Difference]: Without dead ends: 101 [2025-01-09 03:28:46,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-01-09 03:28:46,993 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:28:46,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 141 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:28:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-01-09 03:28:47,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2025-01-09 03:28:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2025-01-09 03:28:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2025-01-09 03:28:47,004 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 30 [2025-01-09 03:28:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:28:47,004 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2025-01-09 03:28:47,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-09 03:28:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2025-01-09 03:28:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-01-09 03:28:47,005 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:47,005 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:47,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 03:28:47,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:28:47,210 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:47,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash -897447482, now seen corresponding path program 1 times [2025-01-09 03:28:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:47,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188039078] [2025-01-09 03:28:47,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:47,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 03:28:47,240 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 03:28:47,240 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:47,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:28:47,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481823044] [2025-01-09 03:28:47,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:47,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:28:47,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:28:47,246 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) [2025-01-09 03:28:47,247 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 [2025-01-09 03:28:47,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 03:28:47,319 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 03:28:47,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:47,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:47,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:28:47,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:28:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-09 03:28:47,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:28:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-09 03:28:47,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:28:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188039078] [2025-01-09 03:28:47,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:28:47,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481823044] [2025-01-09 03:28:47,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481823044] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 03:28:47,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:28:47,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2025-01-09 03:28:47,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126971568] [2025-01-09 03:28:47,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:28:47,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 03:28:47,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:28:47,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 03:28:47,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:28:47,492 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 03:28:51,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:28:55,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:28:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:28:55,582 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2025-01-09 03:28:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:28:55,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2025-01-09 03:28:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:28:55,584 INFO L225 Difference]: With dead ends: 114 [2025-01-09 03:28:55,584 INFO L226 Difference]: Without dead ends: 112 [2025-01-09 03:28:55,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:28:55,584 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:28:55,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 96 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2025-01-09 03:28:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-01-09 03:28:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2025-01-09 03:28:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 73 states have internal predecessors, (82), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2025-01-09 03:28:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2025-01-09 03:28:55,605 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 38 [2025-01-09 03:28:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:28:55,605 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2025-01-09 03:28:55,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 03:28:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2025-01-09 03:28:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-01-09 03:28:55,606 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:28:55,606 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:28:55,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 03:28:55,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-09 03:28:55,810 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:28:55,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:28:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash -207368571, now seen corresponding path program 1 times [2025-01-09 03:28:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:28:55,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674552938] [2025-01-09 03:28:55,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:55,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:28:55,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-09 03:28:55,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 03:28:55,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:55,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:28:55,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416533182] [2025-01-09 03:28:55,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:28:55,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:28:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:28:55,835 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) [2025-01-09 03:28:55,842 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 [2025-01-09 03:28:55,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-09 03:28:55,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 03:28:55,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:28:55,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:28:55,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-09 03:28:55,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:28:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-09 03:28:56,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:29:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-09 03:29:01,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:29:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674552938] [2025-01-09 03:29:01,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:29:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416533182] [2025-01-09 03:29:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416533182] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:29:01,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:29:01,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2025-01-09 03:29:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965229020] [2025-01-09 03:29:01,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:29:01,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 03:29:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:29:01,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 03:29:01,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2025-01-09 03:29:01,264 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2025-01-09 03:29:05,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:29:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:29:05,639 INFO L93 Difference]: Finished difference Result 138 states and 169 transitions. [2025-01-09 03:29:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 03:29:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 46 [2025-01-09 03:29:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:29:05,642 INFO L225 Difference]: With dead ends: 138 [2025-01-09 03:29:05,642 INFO L226 Difference]: Without dead ends: 134 [2025-01-09 03:29:05,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:29:05,646 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:29:05,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 195 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 168 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2025-01-09 03:29:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2025-01-09 03:29:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2025-01-09 03:29:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 85 states have internal predecessors, (96), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2025-01-09 03:29:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2025-01-09 03:29:05,666 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 46 [2025-01-09 03:29:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:29:05,668 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2025-01-09 03:29:05,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2025-01-09 03:29:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2025-01-09 03:29:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-09 03:29:05,669 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:29:05,669 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:29:05,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 03:29:05,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:29:05,870 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:29:05,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:29:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1829451524, now seen corresponding path program 1 times [2025-01-09 03:29:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:29:05,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224067589] [2025-01-09 03:29:05,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:29:05,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:29:05,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-09 03:29:05,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-09 03:29:05,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:29:05,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:29:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-01-09 03:29:05,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:29:05,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224067589] [2025-01-09 03:29:05,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224067589] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:29:05,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59039971] [2025-01-09 03:29:05,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:29:05,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:29:05,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:29:05,983 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) [2025-01-09 03:29:05,984 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 [2025-01-09 03:29:06,004 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-09 03:29:06,016 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-09 03:29:06,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:29:06,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:29:06,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:29:06,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:29:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-01-09 03:29:06,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:29:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-01-09 03:29:06,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59039971] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:29:06,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:29:06,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2025-01-09 03:29:06,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13398158] [2025-01-09 03:29:06,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:29:06,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 03:29:06,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:29:06,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 03:29:06,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:29:06,169 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2025-01-09 03:29:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:29:06,293 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2025-01-09 03:29:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 03:29:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 51 [2025-01-09 03:29:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:29:06,294 INFO L225 Difference]: With dead ends: 201 [2025-01-09 03:29:06,295 INFO L226 Difference]: Without dead ends: 180 [2025-01-09 03:29:06,295 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-01-09 03:29:06,295 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:29:06,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 175 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:29:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2025-01-09 03:29:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2025-01-09 03:29:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 123 states have internal predecessors, (137), 38 states have call successors, (38), 21 states have call predecessors, (38), 20 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2025-01-09 03:29:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 210 transitions. [2025-01-09 03:29:06,311 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 210 transitions. Word has length 51 [2025-01-09 03:29:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:29:06,311 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 210 transitions. [2025-01-09 03:29:06,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2025-01-09 03:29:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 210 transitions. [2025-01-09 03:29:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-01-09 03:29:06,312 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:29:06,312 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:29:06,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 03:29:06,512 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,SelfDestructingSolverStorable9 [2025-01-09 03:29:06,513 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:29:06,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:29:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1713257457, now seen corresponding path program 1 times [2025-01-09 03:29:06,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:29:06,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177636151] [2025-01-09 03:29:06,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:29:06,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:29:06,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-01-09 03:29:06,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-01-09 03:29:06,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:29:06,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:29:06,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355863888] [2025-01-09 03:29:06,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:29:06,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:29:06,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:29:06,545 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) [2025-01-09 03:29:06,546 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 [2025-01-09 03:29:06,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-01-09 03:29:06,925 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-01-09 03:29:06,925 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:29:06,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:29:06,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-01-09 03:29:06,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:29:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 40 proven. 30 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-01-09 03:29:07,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:29:58,729 WARN L286 SmtUtils]: Spent 7.78s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-01-09 03:30:08,651 WARN L286 SmtUtils]: Spent 9.78s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)