./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/relax-2-2.i -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 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 09:49:44,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 09:49:45,029 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 09:49:45,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 09:49:45,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 09:49:45,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 09:49:45,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 09:49:45,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 09:49:45,058 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 09:49:45,058 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 09:49:45,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 09:49:45,059 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 09:49:45,059 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 09:49:45,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 09:49:45,059 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 09:49:45,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 09:49:45,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 09:49:45,060 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 09:49:45,061 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 09:49:45,061 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 09:49:45,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 09:49:45,061 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 09:49:45,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 09:49:45,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 09:49:45,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 09:49:45,062 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 09:49:45,062 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 -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2025-02-05 09:49:45,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 09:49:45,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 09:49:45,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 09:49:45,287 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 09:49:45,287 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 09:49:45,288 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2025-02-05 09:49:46,439 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5802fe670/4e294c6e97344d6584e145e2dadde89e/FLAGf5edb9f15 [2025-02-05 09:49:46,726 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 09:49:46,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2025-02-05 09:49:46,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5802fe670/4e294c6e97344d6584e145e2dadde89e/FLAGf5edb9f15 [2025-02-05 09:49:47,012 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5802fe670/4e294c6e97344d6584e145e2dadde89e [2025-02-05 09:49:47,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 09:49:47,014 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 09:49:47,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 09:49:47,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 09:49:47,018 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 09:49:47,018 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,019 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6755a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47, skipping insertion in model container [2025-02-05 09:49:47,019 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,043 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 09:49:47,138 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2025-02-05 09:49:47,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 09:49:47,210 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 09:49:47,217 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2025-02-05 09:49:47,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 09:49:47,264 INFO L204 MainTranslator]: Completed translation [2025-02-05 09:49:47,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47 WrapperNode [2025-02-05 09:49:47,265 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 09:49:47,266 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 09:49:47,266 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 09:49:47,266 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 09:49:47,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,292 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 125 [2025-02-05 09:49:47,292 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 09:49:47,293 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 09:49:47,293 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 09:49:47,293 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 09:49:47,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,301 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,311 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-02-05 09:49:47,311 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,311 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,315 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,317 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,318 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 09:49:47,319 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 09:49:47,319 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 09:49:47,319 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 09:49:47,319 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (1/1) ... [2025-02-05 09:49:47,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 09:49:47,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:47,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 09:49:47,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 09:49:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 09:49:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 09:49:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 09:49:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 09:49:47,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 09:49:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 09:49:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 09:49:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 09:49:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 09:49:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 09:49:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-05 09:49:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 09:49:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 09:49:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 09:49:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 09:49:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 09:49:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 09:49:47,437 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 09:49:47,439 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 09:49:47,620 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2025-02-05 09:49:47,621 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 09:49:47,627 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 09:49:47,627 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 09:49:47,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 09:49:47 BoogieIcfgContainer [2025-02-05 09:49:47,627 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 09:49:47,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 09:49:47,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 09:49:47,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 09:49:47,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 09:49:47" (1/3) ... [2025-02-05 09:49:47,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ef07a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 09:49:47, skipping insertion in model container [2025-02-05 09:49:47,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:49:47" (2/3) ... [2025-02-05 09:49:47,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ef07a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 09:49:47, skipping insertion in model container [2025-02-05 09:49:47,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 09:49:47" (3/3) ... [2025-02-05 09:49:47,634 INFO L128 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2025-02-05 09:49:47,646 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 09:49:47,648 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG relax-2-2.i that has 3 procedures, 48 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-02-05 09:49:47,692 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 09:49:47,704 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;@2095be5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 09:49:47,705 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 09:49:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 41 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 09:49:47,715 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:47,716 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:47,716 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:47,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1204547487, now seen corresponding path program 1 times [2025-02-05 09:49:47,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:47,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136617702] [2025-02-05 09:49:47,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:47,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:47,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-05 09:49:47,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 09:49:47,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:47,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 09:49:47,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:47,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136617702] [2025-02-05 09:49:47,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136617702] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:47,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906234911] [2025-02-05 09:49:47,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:47,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:47,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:47,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:47,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 09:49:47,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-05 09:49:47,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 09:49:47,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:47,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:47,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 09:49:47,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 09:49:47,968 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 09:49:47,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906234911] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:47,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 09:49:47,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 09:49:47,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972131234] [2025-02-05 09:49:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:47,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 09:49:47,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:47,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 09:49:47,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 09:49:47,992 INFO L87 Difference]: Start difference. First operand has 48 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 41 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 09:49:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:48,008 INFO L93 Difference]: Finished difference Result 93 states and 145 transitions. [2025-02-05 09:49:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 09:49:48,009 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2025-02-05 09:49:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:48,014 INFO L225 Difference]: With dead ends: 93 [2025-02-05 09:49:48,014 INFO L226 Difference]: Without dead ends: 43 [2025-02-05 09:49:48,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 09:49:48,021 INFO L435 NwaCegarLoop]: 69 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, 69 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:48,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-02-05 09:49:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-02-05 09:49:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 37 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 09:49:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 62 transitions. [2025-02-05 09:49:48,053 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 62 transitions. Word has length 22 [2025-02-05 09:49:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:48,054 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 62 transitions. [2025-02-05 09:49:48,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 09:49:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 62 transitions. [2025-02-05 09:49:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 09:49:48,056 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:48,056 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:48,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 09:49:48,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 09:49:48,261 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:48,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1799944449, now seen corresponding path program 1 times [2025-02-05 09:49:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:48,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107765182] [2025-02-05 09:49:48,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:48,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-05 09:49:48,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 09:49:48,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:48,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:48,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107765182] [2025-02-05 09:49:48,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107765182] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:48,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:48,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 09:49:48,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051032304] [2025-02-05 09:49:48,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:48,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 09:49:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:48,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 09:49:48,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:49:48,487 INFO L87 Difference]: Start difference. First operand 43 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 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) [2025-02-05 09:49:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:48,522 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2025-02-05 09:49:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 09:49:48,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 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 22 [2025-02-05 09:49:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:48,525 INFO L225 Difference]: With dead ends: 67 [2025-02-05 09:49:48,525 INFO L226 Difference]: Without dead ends: 45 [2025-02-05 09:49:48,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:49:48,526 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:48,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 173 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-05 09:49:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2025-02-05 09:49:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.457142857142857) internal successors, (51), 39 states have internal predecessors, (51), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 09:49:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2025-02-05 09:49:48,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 22 [2025-02-05 09:49:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:48,534 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2025-02-05 09:49:48,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 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) [2025-02-05 09:49:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2025-02-05 09:49:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 09:49:48,536 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:48,537 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:48,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 09:49:48,537 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:48,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:48,538 INFO L85 PathProgramCache]: Analyzing trace with hash 695209794, now seen corresponding path program 1 times [2025-02-05 09:49:48,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:48,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956002781] [2025-02-05 09:49:48,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:48,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:48,551 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 09:49:48,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 09:49:48,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:48,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:48,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:48,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956002781] [2025-02-05 09:49:48,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956002781] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:48,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:48,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 09:49:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071298912] [2025-02-05 09:49:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:48,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 09:49:48,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:48,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 09:49:48,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 09:49:48,777 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 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) [2025-02-05 09:49:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:48,877 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2025-02-05 09:49:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 09:49:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 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 24 [2025-02-05 09:49:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:48,879 INFO L225 Difference]: With dead ends: 93 [2025-02-05 09:49:48,880 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 09:49:48,880 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-05 09:49:48,881 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:48,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 250 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:49:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 09:49:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2025-02-05 09:49:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 52 states have internal predecessors, (71), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 09:49:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2025-02-05 09:49:48,891 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 24 [2025-02-05 09:49:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:48,892 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2025-02-05 09:49:48,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 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) [2025-02-05 09:49:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2025-02-05 09:49:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 09:49:48,892 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:48,892 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:48,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 09:49:48,893 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:48,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1771403104, now seen corresponding path program 1 times [2025-02-05 09:49:48,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:48,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268270914] [2025-02-05 09:49:48,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:48,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:48,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 09:49:48,916 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 09:49:48,917 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:48,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:49,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:49,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268270914] [2025-02-05 09:49:49,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268270914] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:49,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:49,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 09:49:49,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691881056] [2025-02-05 09:49:49,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:49,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 09:49:49,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:49,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 09:49:49,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 09:49:49,116 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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) [2025-02-05 09:49:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:49,176 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2025-02-05 09:49:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 09:49:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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 25 [2025-02-05 09:49:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:49,180 INFO L225 Difference]: With dead ends: 78 [2025-02-05 09:49:49,181 INFO L226 Difference]: Without dead ends: 66 [2025-02-05 09:49:49,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 09:49:49,181 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:49,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 194 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-02-05 09:49:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2025-02-05 09:49:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.490909090909091) internal successors, (82), 59 states have internal predecessors, (82), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 09:49:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 95 transitions. [2025-02-05 09:49:49,192 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 95 transitions. Word has length 25 [2025-02-05 09:49:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:49,192 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 95 transitions. [2025-02-05 09:49:49,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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) [2025-02-05 09:49:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 95 transitions. [2025-02-05 09:49:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 09:49:49,193 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:49,193 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:49,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-05 09:49:49,193 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:49,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1817014310, now seen corresponding path program 1 times [2025-02-05 09:49:49,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:49,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58516808] [2025-02-05 09:49:49,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:49,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:49,203 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 09:49:49,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 09:49:49,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:49,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:49,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:49,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58516808] [2025-02-05 09:49:49,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58516808] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:49,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550827965] [2025-02-05 09:49:49,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:49,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:49,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:49,442 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:49,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 09:49:49,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 09:49:49,503 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 09:49:49,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:49,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:49,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 09:49:49,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:49,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550827965] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:49:49,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:49:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-02-05 09:49:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121928790] [2025-02-05 09:49:49,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:49:49,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 09:49:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:49,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 09:49:49,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2025-02-05 09:49:49,873 INFO L87 Difference]: Start difference. First operand 65 states and 95 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:50,196 INFO L93 Difference]: Finished difference Result 165 states and 247 transitions. [2025-02-05 09:49:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 09:49:50,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2025-02-05 09:49:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:50,197 INFO L225 Difference]: With dead ends: 165 [2025-02-05 09:49:50,197 INFO L226 Difference]: Without dead ends: 136 [2025-02-05 09:49:50,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2025-02-05 09:49:50,199 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 122 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:50,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 929 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:49:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-02-05 09:49:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 92. [2025-02-05 09:49:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.5125) internal successors, (121), 85 states have internal predecessors, (121), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 136 transitions. [2025-02-05 09:49:50,213 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 136 transitions. Word has length 25 [2025-02-05 09:49:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:50,214 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 136 transitions. [2025-02-05 09:49:50,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 136 transitions. [2025-02-05 09:49:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 09:49:50,215 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:50,215 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:50,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 09:49:50,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:50,415 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:50,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1190881188, now seen corresponding path program 1 times [2025-02-05 09:49:50,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:50,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321100360] [2025-02-05 09:49:50,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:50,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:50,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 09:49:50,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 09:49:50,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:50,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:50,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321100360] [2025-02-05 09:49:50,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321100360] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:50,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:50,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 09:49:50,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165099605] [2025-02-05 09:49:50,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:50,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 09:49:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:50,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 09:49:50,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 09:49:50,515 INFO L87 Difference]: Start difference. First operand 92 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 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) [2025-02-05 09:49:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:50,553 INFO L93 Difference]: Finished difference Result 108 states and 154 transitions. [2025-02-05 09:49:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 09:49:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 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 26 [2025-02-05 09:49:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:50,555 INFO L225 Difference]: With dead ends: 108 [2025-02-05 09:49:50,555 INFO L226 Difference]: Without dead ends: 86 [2025-02-05 09:49:50,555 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 09:49:50,557 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:50,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-02-05 09:49:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2025-02-05 09:49:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.457142857142857) internal successors, (102), 75 states have internal predecessors, (102), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2025-02-05 09:49:50,569 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 26 [2025-02-05 09:49:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:50,569 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2025-02-05 09:49:50,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 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) [2025-02-05 09:49:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2025-02-05 09:49:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 09:49:50,571 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:50,571 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:50,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-05 09:49:50,572 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:50,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:50,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1356124997, now seen corresponding path program 1 times [2025-02-05 09:49:50,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167119661] [2025-02-05 09:49:50,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:50,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:50,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 09:49:50,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 09:49:50,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:50,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:50,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:50,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167119661] [2025-02-05 09:49:50,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167119661] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:50,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445899137] [2025-02-05 09:49:50,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:50,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:50,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:50,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:50,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 09:49:50,857 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 09:49:50,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 09:49:50,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:50,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:50,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 09:49:50,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:51,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:51,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445899137] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:51,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-05 09:49:51,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 7] total 16 [2025-02-05 09:49:51,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250176371] [2025-02-05 09:49:51,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:51,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 09:49:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:51,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 09:49:51,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2025-02-05 09:49:51,142 INFO L87 Difference]: Start difference. First operand 82 states and 117 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 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) [2025-02-05 09:49:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:51,200 INFO L93 Difference]: Finished difference Result 103 states and 140 transitions. [2025-02-05 09:49:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 09:49:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 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 26 [2025-02-05 09:49:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:51,201 INFO L225 Difference]: With dead ends: 103 [2025-02-05 09:49:51,201 INFO L226 Difference]: Without dead ends: 84 [2025-02-05 09:49:51,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2025-02-05 09:49:51,202 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 8 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:51,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 304 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-05 09:49:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2025-02-05 09:49:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 75 states have internal predecessors, (99), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 114 transitions. [2025-02-05 09:49:51,208 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 114 transitions. Word has length 26 [2025-02-05 09:49:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:51,209 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 114 transitions. [2025-02-05 09:49:51,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 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) [2025-02-05 09:49:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 114 transitions. [2025-02-05 09:49:51,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 09:49:51,209 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:51,209 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:51,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 09:49:51,410 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 [2025-02-05 09:49:51,410 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:51,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:51,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2061751358, now seen corresponding path program 2 times [2025-02-05 09:49:51,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:51,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27969165] [2025-02-05 09:49:51,411 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:49:51,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:51,417 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-05 09:49:51,427 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 26 statements. [2025-02-05 09:49:51,427 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-05 09:49:51,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 09:49:51,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:51,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27969165] [2025-02-05 09:49:51,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27969165] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:51,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:51,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-05 09:49:51,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313344437] [2025-02-05 09:49:51,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:51,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 09:49:51,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:51,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 09:49:51,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-02-05 09:49:51,654 INFO L87 Difference]: Start difference. First operand 82 states and 114 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 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) [2025-02-05 09:49:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:51,786 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2025-02-05 09:49:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 09:49:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 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 26 [2025-02-05 09:49:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:51,787 INFO L225 Difference]: With dead ends: 106 [2025-02-05 09:49:51,787 INFO L226 Difference]: Without dead ends: 104 [2025-02-05 09:49:51,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-05 09:49:51,788 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 56 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:51,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 247 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:49:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-05 09:49:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2025-02-05 09:49:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 65 states have internal predecessors, (84), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 09:49:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2025-02-05 09:49:51,795 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 26 [2025-02-05 09:49:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:51,795 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2025-02-05 09:49:51,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 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) [2025-02-05 09:49:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2025-02-05 09:49:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 09:49:51,796 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:51,796 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:51,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-05 09:49:51,796 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:51,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash -587120961, now seen corresponding path program 1 times [2025-02-05 09:49:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:51,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310879525] [2025-02-05 09:49:51,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:51,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:51,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 09:49:51,804 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 09:49:51,805 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:51,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:51,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:51,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310879525] [2025-02-05 09:49:51,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310879525] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:51,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:51,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 09:49:51,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709791324] [2025-02-05 09:49:51,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:51,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 09:49:51,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:51,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 09:49:51,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:49:51,835 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 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) [2025-02-05 09:49:51,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:51,848 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2025-02-05 09:49:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 09:49:51,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 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 27 [2025-02-05 09:49:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:51,849 INFO L225 Difference]: With dead ends: 89 [2025-02-05 09:49:51,849 INFO L226 Difference]: Without dead ends: 63 [2025-02-05 09:49:51,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:49:51,850 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:51,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-05 09:49:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2025-02-05 09:49:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 56 states have internal predecessors, (71), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 09:49:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2025-02-05 09:49:51,855 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 27 [2025-02-05 09:49:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:51,855 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2025-02-05 09:49:51,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 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) [2025-02-05 09:49:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2025-02-05 09:49:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 09:49:51,856 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:51,856 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:51,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-05 09:49:51,856 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:51,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 342788508, now seen corresponding path program 1 times [2025-02-05 09:49:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546471207] [2025-02-05 09:49:51,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:51,862 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-05 09:49:51,864 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 09:49:51,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:51,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:51,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:51,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546471207] [2025-02-05 09:49:51,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546471207] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:51,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:51,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 09:49:51,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99042447] [2025-02-05 09:49:51,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:51,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 09:49:51,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:51,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 09:49:51,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 09:49:51,884 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 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) [2025-02-05 09:49:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:51,897 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2025-02-05 09:49:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 09:49:51,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 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 28 [2025-02-05 09:49:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:51,898 INFO L225 Difference]: With dead ends: 92 [2025-02-05 09:49:51,898 INFO L226 Difference]: Without dead ends: 72 [2025-02-05 09:49:51,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 09:49:51,899 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:51,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 111 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-02-05 09:49:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2025-02-05 09:49:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.360655737704918) internal successors, (83), 65 states have internal predecessors, (83), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 09:49:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2025-02-05 09:49:51,904 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 28 [2025-02-05 09:49:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:51,904 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2025-02-05 09:49:51,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 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) [2025-02-05 09:49:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2025-02-05 09:49:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 09:49:51,905 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:51,905 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:51,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-05 09:49:51,906 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:51,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash 193081311, now seen corresponding path program 1 times [2025-02-05 09:49:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:51,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489449727] [2025-02-05 09:49:51,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:51,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 09:49:51,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 09:49:51,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:51,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:52,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489449727] [2025-02-05 09:49:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489449727] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903990726] [2025-02-05 09:49:52,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:52,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:52,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:52,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 09:49:52,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 09:49:52,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 09:49:52,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:52,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:52,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-05 09:49:52,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 09:49:52,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:52,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903990726] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:49:52,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:49:52,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 12] total 20 [2025-02-05 09:49:52,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264985505] [2025-02-05 09:49:52,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:49:52,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 09:49:52,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:52,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 09:49:52,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2025-02-05 09:49:52,369 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:52,500 INFO L93 Difference]: Finished difference Result 124 states and 164 transitions. [2025-02-05 09:49:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 09:49:52,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2025-02-05 09:49:52,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:52,503 INFO L225 Difference]: With dead ends: 124 [2025-02-05 09:49:52,503 INFO L226 Difference]: Without dead ends: 62 [2025-02-05 09:49:52,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2025-02-05 09:49:52,504 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 7 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:52,504 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 826 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:49:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-05 09:49:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2025-02-05 09:49:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 53 states have internal predecessors, (67), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 09:49:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2025-02-05 09:49:52,509 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 32 [2025-02-05 09:49:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:52,510 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2025-02-05 09:49:52,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2025-02-05 09:49:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 09:49:52,510 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:52,510 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:52,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 09:49:52,716 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,SelfDestructingSolverStorable10 [2025-02-05 09:49:52,716 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:52,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1169565923, now seen corresponding path program 1 times [2025-02-05 09:49:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:52,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268515409] [2025-02-05 09:49:52,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:52,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 09:49:52,733 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 09:49:52,733 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:52,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:52,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:52,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268515409] [2025-02-05 09:49:52,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268515409] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:52,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452617232] [2025-02-05 09:49:52,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:52,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:52,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:52,817 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:52,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 09:49:52,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 09:49:52,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 09:49:52,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:52,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:52,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 09:49:52,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:52,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:53,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452617232] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:49:53,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:49:53,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2025-02-05 09:49:53,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788264504] [2025-02-05 09:49:53,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:49:53,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 09:49:53,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:53,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 09:49:53,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2025-02-05 09:49:53,094 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand has 15 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:53,207 INFO L93 Difference]: Finished difference Result 126 states and 177 transitions. [2025-02-05 09:49:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 09:49:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2025-02-05 09:49:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:53,208 INFO L225 Difference]: With dead ends: 126 [2025-02-05 09:49:53,208 INFO L226 Difference]: Without dead ends: 106 [2025-02-05 09:49:53,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2025-02-05 09:49:53,209 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 56 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:53,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 529 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:49:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-02-05 09:49:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2025-02-05 09:49:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.375) internal successors, (99), 76 states have internal predecessors, (99), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2025-02-05 09:49:53,219 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 33 [2025-02-05 09:49:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:53,220 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2025-02-05 09:49:53,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2025-02-05 09:49:53,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 09:49:53,221 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:53,221 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:53,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 09:49:53,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 09:49:53,422 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:53,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:53,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1170489444, now seen corresponding path program 1 times [2025-02-05 09:49:53,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:53,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796527898] [2025-02-05 09:49:53,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:53,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:53,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 09:49:53,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 09:49:53,439 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:53,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:53,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:53,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796527898] [2025-02-05 09:49:53,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796527898] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:53,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569548551] [2025-02-05 09:49:53,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:53,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:53,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:53,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:53,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 09:49:53,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 09:49:53,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 09:49:53,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:53,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:53,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 09:49:53,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 09:49:53,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 09:49:53,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569548551] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:53,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-05 09:49:53,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2025-02-05 09:49:53,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66165180] [2025-02-05 09:49:53,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:53,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 09:49:53,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:53,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 09:49:53,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-05 09:49:53,733 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 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) [2025-02-05 09:49:53,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:53,794 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2025-02-05 09:49:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 09:49:53,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 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 33 [2025-02-05 09:49:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:53,796 INFO L225 Difference]: With dead ends: 104 [2025-02-05 09:49:53,796 INFO L226 Difference]: Without dead ends: 96 [2025-02-05 09:49:53,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-05 09:49:53,797 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:53,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 180 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-05 09:49:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2025-02-05 09:49:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 79 states have internal predecessors, (103), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 118 transitions. [2025-02-05 09:49:53,806 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 118 transitions. Word has length 33 [2025-02-05 09:49:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:53,806 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 118 transitions. [2025-02-05 09:49:53,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 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) [2025-02-05 09:49:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 118 transitions. [2025-02-05 09:49:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-05 09:49:53,807 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:53,807 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:53,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 09:49:54,008 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,SelfDestructingSolverStorable12 [2025-02-05 09:49:54,008 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:54,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash 122521727, now seen corresponding path program 2 times [2025-02-05 09:49:54,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:54,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738902875] [2025-02-05 09:49:54,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:49:54,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:54,016 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-05 09:49:54,032 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-05 09:49:54,032 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:49:54,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:49:54,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:54,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738902875] [2025-02-05 09:49:54,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738902875] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:54,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:54,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 09:49:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18975316] [2025-02-05 09:49:54,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:54,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 09:49:54,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:54,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 09:49:54,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-05 09:49:54,091 INFO L87 Difference]: Start difference. First operand 87 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 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) [2025-02-05 09:49:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:54,132 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2025-02-05 09:49:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 09:49:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 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 34 [2025-02-05 09:49:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:54,137 INFO L225 Difference]: With dead ends: 106 [2025-02-05 09:49:54,137 INFO L226 Difference]: Without dead ends: 98 [2025-02-05 09:49:54,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-05 09:49:54,138 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 25 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:54,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 148 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-02-05 09:49:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2025-02-05 09:49:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.364864864864865) internal successors, (101), 78 states have internal predecessors, (101), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2025-02-05 09:49:54,147 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 34 [2025-02-05 09:49:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:54,147 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2025-02-05 09:49:54,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 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) [2025-02-05 09:49:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2025-02-05 09:49:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-05 09:49:54,148 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:54,149 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:54,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-05 09:49:54,149 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:54,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1529205731, now seen corresponding path program 1 times [2025-02-05 09:49:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:54,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467826043] [2025-02-05 09:49:54,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:54,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:54,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 09:49:54,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 09:49:54,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:54,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:54,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:54,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467826043] [2025-02-05 09:49:54,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467826043] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:54,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541207676] [2025-02-05 09:49:54,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:54,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:54,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:54,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:54,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 09:49:54,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 09:49:54,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 09:49:54,526 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:54,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:54,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-02-05 09:49:54,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:54,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 09:49:54,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 09:49:54,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2025-02-05 09:49:54,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2025-02-05 09:49:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 09:49:54,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 09:49:55,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541207676] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:55,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-05 09:49:55,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 13] total 30 [2025-02-05 09:49:55,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513381507] [2025-02-05 09:49:55,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:55,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 09:49:55,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:55,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 09:49:55,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2025-02-05 09:49:55,077 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 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) [2025-02-05 09:49:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:55,376 INFO L93 Difference]: Finished difference Result 157 states and 219 transitions. [2025-02-05 09:49:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 09:49:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 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 36 [2025-02-05 09:49:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:55,378 INFO L225 Difference]: With dead ends: 157 [2025-02-05 09:49:55,378 INFO L226 Difference]: Without dead ends: 149 [2025-02-05 09:49:55,379 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 09:49:55,379 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 112 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:55,379 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 489 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:49:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2025-02-05 09:49:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2025-02-05 09:49:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.4038461538461537) internal successors, (146), 108 states have internal predecessors, (146), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 161 transitions. [2025-02-05 09:49:55,393 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 161 transitions. Word has length 36 [2025-02-05 09:49:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:55,393 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 161 transitions. [2025-02-05 09:49:55,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 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) [2025-02-05 09:49:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 161 transitions. [2025-02-05 09:49:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-05 09:49:55,394 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:55,394 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:55,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 09:49:55,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:55,595 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:55,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash -213604604, now seen corresponding path program 1 times [2025-02-05 09:49:55,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:55,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563938507] [2025-02-05 09:49:55,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:55,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 09:49:55,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 09:49:55,619 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:55,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 09:49:55,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563938507] [2025-02-05 09:49:55,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563938507] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146025567] [2025-02-05 09:49:55,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:55,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:55,878 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:55,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 09:49:55,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 09:49:55,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 09:49:55,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:55,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:55,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-05 09:49:55,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 09:49:56,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:56,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146025567] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:49:56,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:49:56,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12] total 23 [2025-02-05 09:49:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256822199] [2025-02-05 09:49:56,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:49:56,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 09:49:56,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:56,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 09:49:56,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2025-02-05 09:49:56,264 INFO L87 Difference]: Start difference. First operand 116 states and 161 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:56,713 INFO L93 Difference]: Finished difference Result 222 states and 303 transitions. [2025-02-05 09:49:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 09:49:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2025-02-05 09:49:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:56,715 INFO L225 Difference]: With dead ends: 222 [2025-02-05 09:49:56,716 INFO L226 Difference]: Without dead ends: 178 [2025-02-05 09:49:56,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2025-02-05 09:49:56,717 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:56,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1228 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 09:49:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2025-02-05 09:49:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 117. [2025-02-05 09:49:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.3904761904761904) internal successors, (146), 109 states have internal predecessors, (146), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2025-02-05 09:49:56,751 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 36 [2025-02-05 09:49:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:56,752 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2025-02-05 09:49:56,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2025-02-05 09:49:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 09:49:56,752 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:56,753 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:56,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 09:49:56,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 09:49:56,954 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:56,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1171859563, now seen corresponding path program 1 times [2025-02-05 09:49:56,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:56,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348439255] [2025-02-05 09:49:56,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:56,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:56,966 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 09:49:56,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 09:49:56,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:56,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 09:49:57,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:57,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348439255] [2025-02-05 09:49:57,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348439255] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:57,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195315044] [2025-02-05 09:49:57,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:57,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:57,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:57,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:57,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 09:49:57,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 09:49:57,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 09:49:57,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:57,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:57,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 09:49:57,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 09:49:57,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:57,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195315044] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:49:57,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:49:57,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12] total 20 [2025-02-05 09:49:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019529615] [2025-02-05 09:49:57,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:49:57,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 09:49:57,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:57,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 09:49:57,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-05 09:49:57,422 INFO L87 Difference]: Start difference. First operand 117 states and 161 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:57,605 INFO L93 Difference]: Finished difference Result 160 states and 216 transitions. [2025-02-05 09:49:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 09:49:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2025-02-05 09:49:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:57,606 INFO L225 Difference]: With dead ends: 160 [2025-02-05 09:49:57,606 INFO L226 Difference]: Without dead ends: 104 [2025-02-05 09:49:57,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2025-02-05 09:49:57,607 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 51 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:57,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 842 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:49:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-05 09:49:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-02-05 09:49:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.3703703703703705) internal successors, (111), 85 states have internal predecessors, (111), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2025-02-05 09:49:57,620 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 37 [2025-02-05 09:49:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:57,621 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2025-02-05 09:49:57,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2025-02-05 09:49:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-05 09:49:57,621 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:57,621 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:57,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 09:49:57,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:57,826 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:57,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1079401634, now seen corresponding path program 1 times [2025-02-05 09:49:57,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:57,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526469120] [2025-02-05 09:49:57,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:57,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:57,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-05 09:49:57,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 09:49:57,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:57,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 09:49:57,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:57,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526469120] [2025-02-05 09:49:57,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526469120] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:57,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:57,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 09:49:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549871659] [2025-02-05 09:49:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:57,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 09:49:57,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:57,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 09:49:57,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:49:57,889 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 09:49:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:57,926 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2025-02-05 09:49:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 09:49:57,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2025-02-05 09:49:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:57,927 INFO L225 Difference]: With dead ends: 119 [2025-02-05 09:49:57,927 INFO L226 Difference]: Without dead ends: 91 [2025-02-05 09:49:57,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:49:57,928 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 1 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 172 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 [2025-02-05 09:49:57,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 172 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:49:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-02-05 09:49:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2025-02-05 09:49:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 83 states have internal predecessors, (108), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2025-02-05 09:49:57,940 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 38 [2025-02-05 09:49:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:57,940 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2025-02-05 09:49:57,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 09:49:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2025-02-05 09:49:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 09:49:57,941 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:57,941 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:57,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-05 09:49:57,941 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:57,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:57,941 INFO L85 PathProgramCache]: Analyzing trace with hash -912857274, now seen corresponding path program 1 times [2025-02-05 09:49:57,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:57,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475941743] [2025-02-05 09:49:57,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:57,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:57,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 09:49:57,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 09:49:57,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:57,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:49:58,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:58,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475941743] [2025-02-05 09:49:58,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475941743] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:49:58,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825914070] [2025-02-05 09:49:58,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:49:58,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:58,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:49:58,350 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:49:58,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 09:49:58,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 09:49:58,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 09:49:58,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:49:58,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:58,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-02-05 09:49:58,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:49:58,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 09:49:58,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2025-02-05 09:49:58,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2025-02-05 09:49:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:49:58,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:49:58,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:49:58,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2025-02-05 09:49:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:49:58,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825914070] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:49:58,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:49:58,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2025-02-05 09:49:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773901329] [2025-02-05 09:49:58,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:49:58,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-05 09:49:58,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:58,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-05 09:49:58,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2025-02-05 09:49:58,844 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:59,383 INFO L93 Difference]: Finished difference Result 147 states and 201 transitions. [2025-02-05 09:49:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 09:49:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2025-02-05 09:49:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:59,385 INFO L225 Difference]: With dead ends: 147 [2025-02-05 09:49:59,385 INFO L226 Difference]: Without dead ends: 127 [2025-02-05 09:49:59,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2025-02-05 09:49:59,387 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 135 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:59,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 889 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 09:49:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-02-05 09:49:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2025-02-05 09:49:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.369047619047619) internal successors, (115), 88 states have internal predecessors, (115), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:49:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2025-02-05 09:49:59,400 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 37 [2025-02-05 09:49:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:49:59,400 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2025-02-05 09:49:59,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:49:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2025-02-05 09:49:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 09:49:59,401 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:49:59,401 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:49:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 09:49:59,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:49:59,605 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:49:59,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:49:59,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1640223208, now seen corresponding path program 2 times [2025-02-05 09:49:59,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:49:59,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605952715] [2025-02-05 09:49:59,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:49:59,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:49:59,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 09:49:59,623 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 37 statements. [2025-02-05 09:49:59,623 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-05 09:49:59,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:49:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 09:49:59,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:49:59,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605952715] [2025-02-05 09:49:59,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605952715] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:49:59,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:49:59,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 09:49:59,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765906176] [2025-02-05 09:49:59,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:49:59,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 09:49:59,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:49:59,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 09:49:59,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 09:49:59,866 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 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) [2025-02-05 09:49:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:49:59,993 INFO L93 Difference]: Finished difference Result 133 states and 179 transitions. [2025-02-05 09:49:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 09:49:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 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 37 [2025-02-05 09:49:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:49:59,994 INFO L225 Difference]: With dead ends: 133 [2025-02-05 09:49:59,994 INFO L226 Difference]: Without dead ends: 125 [2025-02-05 09:49:59,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 09:49:59,995 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 20 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:49:59,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 208 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:49:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-02-05 09:50:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2025-02-05 09:50:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 103 states have internal predecessors, (133), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2025-02-05 09:50:00,008 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 37 [2025-02-05 09:50:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:00,009 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2025-02-05 09:50:00,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 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) [2025-02-05 09:50:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2025-02-05 09:50:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 09:50:00,009 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:00,009 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:00,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-05 09:50:00,010 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:00,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash 966445989, now seen corresponding path program 1 times [2025-02-05 09:50:00,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:00,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751915232] [2025-02-05 09:50:00,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:00,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 09:50:00,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 09:50:00,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:00,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:00,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751915232] [2025-02-05 09:50:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751915232] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:50:00,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:50:00,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 09:50:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962824006] [2025-02-05 09:50:00,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:50:00,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 09:50:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:00,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 09:50:00,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:50:00,073 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 09:50:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:00,104 INFO L93 Difference]: Finished difference Result 136 states and 181 transitions. [2025-02-05 09:50:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 09:50:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2025-02-05 09:50:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:00,106 INFO L225 Difference]: With dead ends: 136 [2025-02-05 09:50:00,106 INFO L226 Difference]: Without dead ends: 118 [2025-02-05 09:50:00,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:50:00,106 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 3 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:00,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 107 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:50:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-02-05 09:50:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2025-02-05 09:50:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 106 states have internal predecessors, (137), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 152 transitions. [2025-02-05 09:50:00,119 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 152 transitions. Word has length 39 [2025-02-05 09:50:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:00,119 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 152 transitions. [2025-02-05 09:50:00,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 09:50:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 152 transitions. [2025-02-05 09:50:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-05 09:50:00,120 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:00,120 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:00,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-05 09:50:00,120 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:00,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:00,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1489020409, now seen corresponding path program 2 times [2025-02-05 09:50:00,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:00,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531340806] [2025-02-05 09:50:00,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:50:00,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:00,126 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-05 09:50:00,140 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 09:50:00,140 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:50:00,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:00,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531340806] [2025-02-05 09:50:00,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531340806] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45746308] [2025-02-05 09:50:00,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:50:00,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:00,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:00,249 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:00,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 09:50:00,299 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-05 09:50:00,317 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 09:50:00,317 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:50:00,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:00,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 09:50:00,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:00,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:00,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45746308] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:00,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:00,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-02-05 09:50:00,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725690833] [2025-02-05 09:50:00,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:00,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 09:50:00,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:00,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 09:50:00,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2025-02-05 09:50:00,504 INFO L87 Difference]: Start difference. First operand 114 states and 152 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 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) [2025-02-05 09:50:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:00,681 INFO L93 Difference]: Finished difference Result 235 states and 325 transitions. [2025-02-05 09:50:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 09:50:00,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 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 38 [2025-02-05 09:50:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:00,683 INFO L225 Difference]: With dead ends: 235 [2025-02-05 09:50:00,683 INFO L226 Difference]: Without dead ends: 211 [2025-02-05 09:50:00,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2025-02-05 09:50:00,684 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 65 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:00,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 717 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:50:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-02-05 09:50:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 139. [2025-02-05 09:50:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 126 states have (on average 1.380952380952381) internal successors, (174), 130 states have internal predecessors, (174), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 191 transitions. [2025-02-05 09:50:00,703 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 191 transitions. Word has length 38 [2025-02-05 09:50:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:00,703 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 191 transitions. [2025-02-05 09:50:00,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 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) [2025-02-05 09:50:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 191 transitions. [2025-02-05 09:50:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 09:50:00,704 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:00,704 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:00,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 09:50:00,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-02-05 09:50:00,905 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:00,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash 745288651, now seen corresponding path program 3 times [2025-02-05 09:50:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893535972] [2025-02-05 09:50:00,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:50:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:00,914 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 2 equivalence classes. [2025-02-05 09:50:00,931 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 09:50:00,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 09:50:00,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 09:50:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893535972] [2025-02-05 09:50:01,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893535972] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550425398] [2025-02-05 09:50:01,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:50:01,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:01,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:01,136 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:01,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 09:50:01,191 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 2 equivalence classes. [2025-02-05 09:50:01,211 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 09:50:01,212 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 09:50:01,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:01,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 09:50:01,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 09:50:01,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 09:50:01,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550425398] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:01,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:01,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2025-02-05 09:50:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208875853] [2025-02-05 09:50:01,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:01,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 09:50:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:01,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 09:50:01,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2025-02-05 09:50:01,423 INFO L87 Difference]: Start difference. First operand 139 states and 191 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 2 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) [2025-02-05 09:50:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:01,769 INFO L93 Difference]: Finished difference Result 219 states and 305 transitions. [2025-02-05 09:50:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 09:50:01,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 2 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 39 [2025-02-05 09:50:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:01,770 INFO L225 Difference]: With dead ends: 219 [2025-02-05 09:50:01,770 INFO L226 Difference]: Without dead ends: 211 [2025-02-05 09:50:01,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2025-02-05 09:50:01,771 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 75 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:01,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 775 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:50:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-02-05 09:50:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2025-02-05 09:50:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 131 states have (on average 1.381679389312977) internal successors, (181), 135 states have internal predecessors, (181), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 198 transitions. [2025-02-05 09:50:01,789 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 198 transitions. Word has length 39 [2025-02-05 09:50:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:01,789 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 198 transitions. [2025-02-05 09:50:01,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 2 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) [2025-02-05 09:50:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 198 transitions. [2025-02-05 09:50:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 09:50:01,791 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:01,791 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:01,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:01,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:01,992 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:01,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash 615917720, now seen corresponding path program 1 times [2025-02-05 09:50:01,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:01,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917198820] [2025-02-05 09:50:01,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:01,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:01,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 09:50:02,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 09:50:02,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:02,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:02,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917198820] [2025-02-05 09:50:02,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917198820] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521088755] [2025-02-05 09:50:02,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:02,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:02,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:02,197 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:02,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 09:50:02,246 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 09:50:02,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 09:50:02,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:02,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:02,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 09:50:02,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:50:02,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:02,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521088755] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:02,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:02,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 21 [2025-02-05 09:50:02,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845206485] [2025-02-05 09:50:02,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:02,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 09:50:02,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:02,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 09:50:02,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2025-02-05 09:50:02,643 INFO L87 Difference]: Start difference. First operand 144 states and 198 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 2 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) [2025-02-05 09:50:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:02,926 INFO L93 Difference]: Finished difference Result 234 states and 312 transitions. [2025-02-05 09:50:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 09:50:02,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 2 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 40 [2025-02-05 09:50:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:02,927 INFO L225 Difference]: With dead ends: 234 [2025-02-05 09:50:02,927 INFO L226 Difference]: Without dead ends: 171 [2025-02-05 09:50:02,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2025-02-05 09:50:02,928 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 50 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:02,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 909 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:50:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-02-05 09:50:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2025-02-05 09:50:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 126 states have internal predecessors, (163), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 180 transitions. [2025-02-05 09:50:02,944 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 180 transitions. Word has length 40 [2025-02-05 09:50:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:02,945 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 180 transitions. [2025-02-05 09:50:02,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 2 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) [2025-02-05 09:50:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 180 transitions. [2025-02-05 09:50:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 09:50:02,945 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:02,945 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:02,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:03,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:03,146 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:03,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash 620584831, now seen corresponding path program 1 times [2025-02-05 09:50:03,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:03,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797250800] [2025-02-05 09:50:03,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:03,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:03,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 09:50:03,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 09:50:03,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:03,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 09:50:03,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797250800] [2025-02-05 09:50:03,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797250800] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569401461] [2025-02-05 09:50:03,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:03,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:03,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:03,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 09:50:03,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 09:50:03,319 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 09:50:03,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:03,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:03,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 09:50:03,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 09:50:03,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:03,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569401461] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:03,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:03,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-02-05 09:50:03,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516172050] [2025-02-05 09:50:03,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:03,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 09:50:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:03,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 09:50:03,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2025-02-05 09:50:03,513 INFO L87 Difference]: Start difference. First operand 135 states and 180 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:03,756 INFO L93 Difference]: Finished difference Result 220 states and 297 transitions. [2025-02-05 09:50:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 09:50:03,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2025-02-05 09:50:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:03,757 INFO L225 Difference]: With dead ends: 220 [2025-02-05 09:50:03,758 INFO L226 Difference]: Without dead ends: 190 [2025-02-05 09:50:03,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2025-02-05 09:50:03,758 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 33 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:03,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1052 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:50:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2025-02-05 09:50:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 144. [2025-02-05 09:50:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 131 states have (on average 1.3511450381679388) internal successors, (177), 135 states have internal predecessors, (177), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 194 transitions. [2025-02-05 09:50:03,782 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 194 transitions. Word has length 40 [2025-02-05 09:50:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:03,782 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 194 transitions. [2025-02-05 09:50:03,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 194 transitions. [2025-02-05 09:50:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 09:50:03,784 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:03,784 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:03,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 09:50:03,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-05 09:50:03,985 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:03,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash 303276380, now seen corresponding path program 2 times [2025-02-05 09:50:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769105766] [2025-02-05 09:50:03,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:50:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:03,992 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-05 09:50:04,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 09:50:04,007 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:50:04,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 09:50:04,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:04,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769105766] [2025-02-05 09:50:04,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769105766] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:04,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915426156] [2025-02-05 09:50:04,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:50:04,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:04,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:04,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:04,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 09:50:04,420 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-05 09:50:04,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 09:50:04,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:50:04,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:04,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 09:50:04,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 09:50:04,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 09:50:04,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915426156] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:04,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:04,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 24 [2025-02-05 09:50:04,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842162825] [2025-02-05 09:50:04,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:04,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 09:50:04,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:04,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 09:50:04,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2025-02-05 09:50:04,666 INFO L87 Difference]: Start difference. First operand 144 states and 194 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 09:50:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:05,079 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2025-02-05 09:50:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 09:50:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2025-02-05 09:50:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:05,081 INFO L225 Difference]: With dead ends: 209 [2025-02-05 09:50:05,081 INFO L226 Difference]: Without dead ends: 201 [2025-02-05 09:50:05,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2025-02-05 09:50:05,081 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 97 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:05,082 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 738 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:50:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2025-02-05 09:50:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 147. [2025-02-05 09:50:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 134 states have (on average 1.3432835820895523) internal successors, (180), 138 states have internal predecessors, (180), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 197 transitions. [2025-02-05 09:50:05,104 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 197 transitions. Word has length 41 [2025-02-05 09:50:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:05,104 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 197 transitions. [2025-02-05 09:50:05,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 09:50:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 197 transitions. [2025-02-05 09:50:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-05 09:50:05,105 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:05,105 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:05,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:05,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-05 09:50:05,306 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:05,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash 230937372, now seen corresponding path program 1 times [2025-02-05 09:50:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:05,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141898996] [2025-02-05 09:50:05,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:05,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-05 09:50:05,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 09:50:05,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:05,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 09:50:05,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141898996] [2025-02-05 09:50:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141898996] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532900048] [2025-02-05 09:50:05,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:05,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:05,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:05,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 09:50:05,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-05 09:50:05,958 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 09:50:05,958 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:05,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:05,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-02-05 09:50:05,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:06,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 09:50:06,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2025-02-05 09:50:06,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2025-02-05 09:50:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 09:50:06,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:06,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:50:06,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2025-02-05 09:50:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 09:50:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532900048] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:06,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:06,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 12] total 35 [2025-02-05 09:50:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247744376] [2025-02-05 09:50:06,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:06,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-05 09:50:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:06,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-05 09:50:06,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2025-02-05 09:50:06,535 INFO L87 Difference]: Start difference. First operand 147 states and 197 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 09:50:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:07,112 INFO L93 Difference]: Finished difference Result 250 states and 332 transitions. [2025-02-05 09:50:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-05 09:50:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-02-05 09:50:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:07,113 INFO L225 Difference]: With dead ends: 250 [2025-02-05 09:50:07,113 INFO L226 Difference]: Without dead ends: 177 [2025-02-05 09:50:07,114 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2025-02-05 09:50:07,114 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 104 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:07,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 604 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 09:50:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2025-02-05 09:50:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 159. [2025-02-05 09:50:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 146 states have (on average 1.3287671232876712) internal successors, (194), 150 states have internal predecessors, (194), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 211 transitions. [2025-02-05 09:50:07,138 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 211 transitions. Word has length 42 [2025-02-05 09:50:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:07,139 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 211 transitions. [2025-02-05 09:50:07,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 09:50:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 211 transitions. [2025-02-05 09:50:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-05 09:50:07,139 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:07,139 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:07,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-05 09:50:07,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:07,344 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:07,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:07,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1939978935, now seen corresponding path program 3 times [2025-02-05 09:50:07,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:07,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719065363] [2025-02-05 09:50:07,345 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:50:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:07,355 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 3 equivalence classes. [2025-02-05 09:50:07,363 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 38 of 44 statements. [2025-02-05 09:50:07,364 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 09:50:07,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 09:50:07,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:07,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719065363] [2025-02-05 09:50:07,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719065363] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:07,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702621845] [2025-02-05 09:50:07,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:50:07,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:07,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:07,555 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:07,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 09:50:07,617 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 3 equivalence classes. [2025-02-05 09:50:07,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 38 of 44 statements. [2025-02-05 09:50:07,661 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 09:50:07,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:07,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 09:50:07,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-05 09:50:07,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-05 09:50:07,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702621845] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:07,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:07,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 17 [2025-02-05 09:50:07,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502235414] [2025-02-05 09:50:07,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:07,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 09:50:07,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:07,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 09:50:07,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2025-02-05 09:50:07,908 INFO L87 Difference]: Start difference. First operand 159 states and 211 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 2 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) [2025-02-05 09:50:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:08,198 INFO L93 Difference]: Finished difference Result 329 states and 449 transitions. [2025-02-05 09:50:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 09:50:08,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 2 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 44 [2025-02-05 09:50:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:08,199 INFO L225 Difference]: With dead ends: 329 [2025-02-05 09:50:08,200 INFO L226 Difference]: Without dead ends: 279 [2025-02-05 09:50:08,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2025-02-05 09:50:08,200 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 96 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:08,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 815 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:50:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2025-02-05 09:50:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 220. [2025-02-05 09:50:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 207 states have (on average 1.3478260869565217) internal successors, (279), 211 states have internal predecessors, (279), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 296 transitions. [2025-02-05 09:50:08,230 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 296 transitions. Word has length 44 [2025-02-05 09:50:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:08,230 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 296 transitions. [2025-02-05 09:50:08,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 2 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) [2025-02-05 09:50:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 296 transitions. [2025-02-05 09:50:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 09:50:08,231 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:08,231 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:08,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-05 09:50:08,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-05 09:50:08,432 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:08,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:08,432 INFO L85 PathProgramCache]: Analyzing trace with hash 909159258, now seen corresponding path program 1 times [2025-02-05 09:50:08,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:08,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655165528] [2025-02-05 09:50:08,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:08,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:08,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 09:50:08,442 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 09:50:08,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:08,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 09:50:08,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655165528] [2025-02-05 09:50:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655165528] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161123892] [2025-02-05 09:50:08,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:08,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:08,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:08,537 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:08,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 09:50:08,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 09:50:08,612 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 09:50:08,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:08,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:08,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 09:50:08,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:08,676 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:08,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161123892] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:08,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:08,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-02-05 09:50:08,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37896606] [2025-02-05 09:50:08,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:08,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 09:50:08,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:08,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 09:50:08,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-02-05 09:50:08,759 INFO L87 Difference]: Start difference. First operand 220 states and 296 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 09:50:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:08,956 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2025-02-05 09:50:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 09:50:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2025-02-05 09:50:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:08,958 INFO L225 Difference]: With dead ends: 265 [2025-02-05 09:50:08,958 INFO L226 Difference]: Without dead ends: 220 [2025-02-05 09:50:08,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2025-02-05 09:50:08,961 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:08,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 442 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:50:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-02-05 09:50:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2025-02-05 09:50:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 199 states have (on average 1.3417085427135678) internal successors, (267), 203 states have internal predecessors, (267), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 09:50:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 286 transitions. [2025-02-05 09:50:08,990 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 286 transitions. Word has length 47 [2025-02-05 09:50:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:08,991 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 286 transitions. [2025-02-05 09:50:08,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 09:50:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 286 transitions. [2025-02-05 09:50:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-05 09:50:08,992 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:08,993 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:08,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:09,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-05 09:50:09,199 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:09,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:09,199 INFO L85 PathProgramCache]: Analyzing trace with hash -853760713, now seen corresponding path program 1 times [2025-02-05 09:50:09,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:09,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36881656] [2025-02-05 09:50:09,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:09,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:09,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-05 09:50:09,216 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-05 09:50:09,216 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:09,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 09:50:09,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:09,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36881656] [2025-02-05 09:50:09,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36881656] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:09,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644533234] [2025-02-05 09:50:09,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:09,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:09,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:09,507 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:09,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 09:50:09,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-05 09:50:09,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-05 09:50:09,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:09,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:09,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-05 09:50:09,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:09,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 09:50:09,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-05 09:50:09,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2025-02-05 09:50:09,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2025-02-05 09:50:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 09:50:09,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 09:50:10,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644533234] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:10,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:10,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 10] total 32 [2025-02-05 09:50:10,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210198518] [2025-02-05 09:50:10,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:10,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 09:50:10,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:10,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 09:50:10,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2025-02-05 09:50:10,151 INFO L87 Difference]: Start difference. First operand 213 states and 286 transitions. Second operand has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 2 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) [2025-02-05 09:50:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:11,398 INFO L93 Difference]: Finished difference Result 428 states and 588 transitions. [2025-02-05 09:50:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-05 09:50:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 2 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 45 [2025-02-05 09:50:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:11,400 INFO L225 Difference]: With dead ends: 428 [2025-02-05 09:50:11,400 INFO L226 Difference]: Without dead ends: 320 [2025-02-05 09:50:11,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2025-02-05 09:50:11,401 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 303 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:11,401 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1312 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 09:50:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2025-02-05 09:50:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 210. [2025-02-05 09:50:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 196 states have (on average 1.3316326530612246) internal successors, (261), 200 states have internal predecessors, (261), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 09:50:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 280 transitions. [2025-02-05 09:50:11,439 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 280 transitions. Word has length 45 [2025-02-05 09:50:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:11,439 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 280 transitions. [2025-02-05 09:50:11,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 2 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) [2025-02-05 09:50:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 280 transitions. [2025-02-05 09:50:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-05 09:50:11,440 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:11,440 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:11,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-05 09:50:11,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:11,642 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:11,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1249061639, now seen corresponding path program 2 times [2025-02-05 09:50:11,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:11,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648836518] [2025-02-05 09:50:11,642 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:50:11,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:11,648 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-02-05 09:50:11,656 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-02-05 09:50:11,656 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:50:11,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-05 09:50:11,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:11,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648836518] [2025-02-05 09:50:11,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648836518] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:11,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419416795] [2025-02-05 09:50:11,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:50:11,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:11,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:11,749 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:11,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-05 09:50:11,813 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-02-05 09:50:11,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-02-05 09:50:11,838 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:50:11,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:11,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 09:50:11,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 09:50:11,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 09:50:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419416795] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:12,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:12,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-02-05 09:50:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509223714] [2025-02-05 09:50:12,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:12,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 09:50:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:12,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 09:50:12,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2025-02-05 09:50:12,077 INFO L87 Difference]: Start difference. First operand 210 states and 280 transitions. Second operand has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:12,460 INFO L93 Difference]: Finished difference Result 438 states and 589 transitions. [2025-02-05 09:50:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-05 09:50:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2025-02-05 09:50:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:12,462 INFO L225 Difference]: With dead ends: 438 [2025-02-05 09:50:12,462 INFO L226 Difference]: Without dead ends: 343 [2025-02-05 09:50:12,462 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 09:50:12,463 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 48 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:12,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 923 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:50:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2025-02-05 09:50:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 294. [2025-02-05 09:50:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 280 states have (on average 1.332142857142857) internal successors, (373), 284 states have internal predecessors, (373), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 09:50:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 392 transitions. [2025-02-05 09:50:12,506 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 392 transitions. Word has length 45 [2025-02-05 09:50:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:12,506 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 392 transitions. [2025-02-05 09:50:12,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 392 transitions. [2025-02-05 09:50:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-05 09:50:12,507 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:12,507 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:12,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:12,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:12,707 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:12,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash 565641452, now seen corresponding path program 1 times [2025-02-05 09:50:12,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:12,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470079366] [2025-02-05 09:50:12,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:12,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:12,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-05 09:50:12,720 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-05 09:50:12,721 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:12,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:12,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470079366] [2025-02-05 09:50:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470079366] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046510658] [2025-02-05 09:50:12,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:12,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:12,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:12,825 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:12,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-05 09:50:12,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-05 09:50:12,907 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-05 09:50:12,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:12,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:12,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 09:50:12,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 09:50:12,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:13,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046510658] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:13,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:13,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2025-02-05 09:50:13,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269675119] [2025-02-05 09:50:13,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:13,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 09:50:13,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:13,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 09:50:13,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2025-02-05 09:50:13,035 INFO L87 Difference]: Start difference. First operand 294 states and 392 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-05 09:50:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:13,276 INFO L93 Difference]: Finished difference Result 342 states and 455 transitions. [2025-02-05 09:50:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 09:50:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2025-02-05 09:50:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:13,278 INFO L225 Difference]: With dead ends: 342 [2025-02-05 09:50:13,278 INFO L226 Difference]: Without dead ends: 285 [2025-02-05 09:50:13,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2025-02-05 09:50:13,279 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 26 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:13,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 377 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:50:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2025-02-05 09:50:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 276. [2025-02-05 09:50:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 264 states have (on average 1.3333333333333333) internal successors, (352), 268 states have internal predecessors, (352), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 367 transitions. [2025-02-05 09:50:13,319 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 367 transitions. Word has length 48 [2025-02-05 09:50:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:13,319 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 367 transitions. [2025-02-05 09:50:13,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-05 09:50:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 367 transitions. [2025-02-05 09:50:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-05 09:50:13,320 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:13,320 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:13,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:13,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-02-05 09:50:13,521 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:13,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1939099124, now seen corresponding path program 1 times [2025-02-05 09:50:13,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:13,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161325758] [2025-02-05 09:50:13,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:13,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:13,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-05 09:50:13,540 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 09:50:13,540 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:13,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 09:50:13,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:13,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161325758] [2025-02-05 09:50:13,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161325758] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:13,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024869254] [2025-02-05 09:50:13,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:13,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:13,653 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:13,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-05 09:50:13,726 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-05 09:50:13,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 09:50:13,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:13,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:13,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 09:50:13,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 09:50:13,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 09:50:13,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024869254] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:13,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:13,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2025-02-05 09:50:13,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962530899] [2025-02-05 09:50:13,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:13,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 09:50:13,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:13,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 09:50:13,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2025-02-05 09:50:13,968 INFO L87 Difference]: Start difference. First operand 276 states and 367 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 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) [2025-02-05 09:50:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:14,151 INFO L93 Difference]: Finished difference Result 337 states and 449 transitions. [2025-02-05 09:50:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 09:50:14,152 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 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 46 [2025-02-05 09:50:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:14,153 INFO L225 Difference]: With dead ends: 337 [2025-02-05 09:50:14,153 INFO L226 Difference]: Without dead ends: 272 [2025-02-05 09:50:14,153 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2025-02-05 09:50:14,154 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 38 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:14,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1002 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:50:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2025-02-05 09:50:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 235. [2025-02-05 09:50:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 223 states have (on average 1.3228699551569507) internal successors, (295), 227 states have internal predecessors, (295), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 310 transitions. [2025-02-05 09:50:14,188 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 310 transitions. Word has length 46 [2025-02-05 09:50:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:14,188 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 310 transitions. [2025-02-05 09:50:14,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 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) [2025-02-05 09:50:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 310 transitions. [2025-02-05 09:50:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 09:50:14,189 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:14,189 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:14,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:14,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-02-05 09:50:14,389 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:14,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash -936650895, now seen corresponding path program 1 times [2025-02-05 09:50:14,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:14,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079467989] [2025-02-05 09:50:14,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:14,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 09:50:14,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 09:50:14,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:14,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079467989] [2025-02-05 09:50:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079467989] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317294909] [2025-02-05 09:50:14,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:14,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:14,620 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:14,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-05 09:50:14,681 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 09:50:14,736 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 09:50:14,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:14,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:14,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-05 09:50:14,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 09:50:14,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317294909] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:15,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:15,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 15] total 32 [2025-02-05 09:50:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254335097] [2025-02-05 09:50:15,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:15,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 09:50:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:15,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 09:50:15,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2025-02-05 09:50:15,166 INFO L87 Difference]: Start difference. First operand 235 states and 310 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2025-02-05 09:50:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:16,000 INFO L93 Difference]: Finished difference Result 323 states and 426 transitions. [2025-02-05 09:50:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-05 09:50:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 49 [2025-02-05 09:50:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:16,002 INFO L225 Difference]: With dead ends: 323 [2025-02-05 09:50:16,002 INFO L226 Difference]: Without dead ends: 279 [2025-02-05 09:50:16,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=2339, Unknown=0, NotChecked=0, Total=2652 [2025-02-05 09:50:16,003 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 231 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:16,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 686 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 09:50:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2025-02-05 09:50:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 242. [2025-02-05 09:50:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 230 states have (on average 1.3043478260869565) internal successors, (300), 233 states have internal predecessors, (300), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 315 transitions. [2025-02-05 09:50:16,050 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 315 transitions. Word has length 49 [2025-02-05 09:50:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:16,050 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 315 transitions. [2025-02-05 09:50:16,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2025-02-05 09:50:16,051 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 315 transitions. [2025-02-05 09:50:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 09:50:16,051 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:16,052 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:16,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-05 09:50:16,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-02-05 09:50:16,252 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:16,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash 448837624, now seen corresponding path program 2 times [2025-02-05 09:50:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248986283] [2025-02-05 09:50:16,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:50:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:16,258 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-02-05 09:50:16,270 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 09:50:16,270 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:50:16,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 09:50:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248986283] [2025-02-05 09:50:16,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248986283] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138136728] [2025-02-05 09:50:16,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:50:16,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:16,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:16,388 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:16,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-05 09:50:16,460 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-02-05 09:50:16,490 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 09:50:16,490 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:50:16,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:16,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 09:50:16,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 09:50:16,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 09:50:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138136728] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:16,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:16,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2025-02-05 09:50:16,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978137298] [2025-02-05 09:50:16,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:16,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 09:50:16,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:16,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 09:50:16,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2025-02-05 09:50:16,708 INFO L87 Difference]: Start difference. First operand 242 states and 315 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 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) [2025-02-05 09:50:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:16,913 INFO L93 Difference]: Finished difference Result 316 states and 416 transitions. [2025-02-05 09:50:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 09:50:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 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 47 [2025-02-05 09:50:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:16,915 INFO L225 Difference]: With dead ends: 316 [2025-02-05 09:50:16,915 INFO L226 Difference]: Without dead ends: 308 [2025-02-05 09:50:16,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2025-02-05 09:50:16,915 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 35 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:16,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 797 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:50:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2025-02-05 09:50:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 248. [2025-02-05 09:50:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 236 states have (on average 1.3093220338983051) internal successors, (309), 239 states have internal predecessors, (309), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 324 transitions. [2025-02-05 09:50:16,953 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 324 transitions. Word has length 47 [2025-02-05 09:50:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:16,953 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 324 transitions. [2025-02-05 09:50:16,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 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) [2025-02-05 09:50:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 324 transitions. [2025-02-05 09:50:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-05 09:50:16,953 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:16,953 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:16,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-05 09:50:17,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-02-05 09:50:17,154 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:17,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash -977152833, now seen corresponding path program 4 times [2025-02-05 09:50:17,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:17,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508659703] [2025-02-05 09:50:17,154 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 09:50:17,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:17,161 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-02-05 09:50:17,171 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-02-05 09:50:17,171 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 09:50:17,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 09:50:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:17,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508659703] [2025-02-05 09:50:17,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508659703] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:17,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805500888] [2025-02-05 09:50:17,554 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 09:50:17,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:17,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:17,556 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:17,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-05 09:50:17,630 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-02-05 09:50:17,681 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-02-05 09:50:17,682 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 09:50:17,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:17,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 09:50:17,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:17,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:18,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805500888] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:18,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:18,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 10] total 32 [2025-02-05 09:50:18,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871229529] [2025-02-05 09:50:18,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:18,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 09:50:18,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:18,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 09:50:18,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2025-02-05 09:50:18,063 INFO L87 Difference]: Start difference. First operand 248 states and 324 transitions. Second operand has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 2 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) [2025-02-05 09:50:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:22,370 INFO L93 Difference]: Finished difference Result 384 states and 506 transitions. [2025-02-05 09:50:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 09:50:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 2 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 48 [2025-02-05 09:50:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:22,372 INFO L225 Difference]: With dead ends: 384 [2025-02-05 09:50:22,372 INFO L226 Difference]: Without dead ends: 349 [2025-02-05 09:50:22,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=254, Invalid=2296, Unknown=0, NotChecked=0, Total=2550 [2025-02-05 09:50:22,373 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 137 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1948 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:22,373 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1948 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 09:50:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2025-02-05 09:50:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 226. [2025-02-05 09:50:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 214 states have (on average 1.3224299065420562) internal successors, (283), 217 states have internal predecessors, (283), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 298 transitions. [2025-02-05 09:50:22,418 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 298 transitions. Word has length 48 [2025-02-05 09:50:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:22,419 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 298 transitions. [2025-02-05 09:50:22,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 2 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) [2025-02-05 09:50:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 298 transitions. [2025-02-05 09:50:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 09:50:22,419 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:22,419 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:22,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:22,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-02-05 09:50:22,620 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:22,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -401824797, now seen corresponding path program 3 times [2025-02-05 09:50:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:22,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360178320] [2025-02-05 09:50:22,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:50:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:22,632 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 5 equivalence classes. [2025-02-05 09:50:22,648 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 43 of 49 statements. [2025-02-05 09:50:22,648 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 09:50:22,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 09:50:22,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:22,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360178320] [2025-02-05 09:50:22,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360178320] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:22,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606668867] [2025-02-05 09:50:22,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:50:22,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:22,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:22,981 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:22,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-05 09:50:23,059 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 5 equivalence classes. [2025-02-05 09:50:23,133 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 43 of 49 statements. [2025-02-05 09:50:23,133 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 09:50:23,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:23,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 09:50:23,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 09:50:23,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-02-05 09:50:23,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606668867] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:23,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:23,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 25 [2025-02-05 09:50:23,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469200139] [2025-02-05 09:50:23,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:23,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 09:50:23,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:23,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 09:50:23,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2025-02-05 09:50:23,483 INFO L87 Difference]: Start difference. First operand 226 states and 298 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 2 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) [2025-02-05 09:50:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:23,991 INFO L93 Difference]: Finished difference Result 357 states and 480 transitions. [2025-02-05 09:50:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 09:50:23,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 2 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 49 [2025-02-05 09:50:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:23,996 INFO L225 Difference]: With dead ends: 357 [2025-02-05 09:50:23,996 INFO L226 Difference]: Without dead ends: 326 [2025-02-05 09:50:23,997 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 09:50:23,997 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 207 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:23,997 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 759 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:50:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2025-02-05 09:50:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 242. [2025-02-05 09:50:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 230 states have (on average 1.3347826086956522) internal successors, (307), 233 states have internal predecessors, (307), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 322 transitions. [2025-02-05 09:50:24,040 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 322 transitions. Word has length 49 [2025-02-05 09:50:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:24,041 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 322 transitions. [2025-02-05 09:50:24,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 2 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) [2025-02-05 09:50:24,041 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 322 transitions. [2025-02-05 09:50:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 09:50:24,041 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:24,041 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:24,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-02-05 09:50:24,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-02-05 09:50:24,242 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:24,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:24,242 INFO L85 PathProgramCache]: Analyzing trace with hash -375253892, now seen corresponding path program 1 times [2025-02-05 09:50:24,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:24,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599658226] [2025-02-05 09:50:24,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:24,251 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-05 09:50:24,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 09:50:24,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:24,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 09:50:24,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599658226] [2025-02-05 09:50:24,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599658226] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643869192] [2025-02-05 09:50:24,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:24,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:24,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:24,379 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:24,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-05 09:50:24,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-05 09:50:24,467 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 09:50:24,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:24,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:24,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-05 09:50:24,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 09:50:24,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 09:50:24,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643869192] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:24,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:24,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 24 [2025-02-05 09:50:24,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093034362] [2025-02-05 09:50:24,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:24,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 09:50:24,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:24,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 09:50:24,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2025-02-05 09:50:24,743 INFO L87 Difference]: Start difference. First operand 242 states and 322 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 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) [2025-02-05 09:50:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:29,393 INFO L93 Difference]: Finished difference Result 491 states and 658 transitions. [2025-02-05 09:50:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 09:50:29,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 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 50 [2025-02-05 09:50:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:29,395 INFO L225 Difference]: With dead ends: 491 [2025-02-05 09:50:29,395 INFO L226 Difference]: Without dead ends: 430 [2025-02-05 09:50:29,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 09:50:29,396 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 90 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:29,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 979 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 09:50:29,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2025-02-05 09:50:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 308. [2025-02-05 09:50:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 296 states have (on average 1.3445945945945945) internal successors, (398), 299 states have internal predecessors, (398), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 413 transitions. [2025-02-05 09:50:29,458 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 413 transitions. Word has length 50 [2025-02-05 09:50:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:29,458 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 413 transitions. [2025-02-05 09:50:29,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 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) [2025-02-05 09:50:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 413 transitions. [2025-02-05 09:50:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 09:50:29,459 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:29,459 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:29,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-05 09:50:29,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-02-05 09:50:29,660 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:29,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash -888847409, now seen corresponding path program 3 times [2025-02-05 09:50:29,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:29,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301433329] [2025-02-05 09:50:29,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:50:29,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:29,667 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 4 equivalence classes. [2025-02-05 09:50:29,702 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 09:50:29,702 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 09:50:29,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 09:50:30,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:30,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301433329] [2025-02-05 09:50:30,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301433329] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:30,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576982021] [2025-02-05 09:50:30,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:50:30,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:30,235 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:30,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-05 09:50:30,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 4 equivalence classes. [2025-02-05 09:50:30,619 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 09:50:30,619 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 09:50:30,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:30,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-02-05 09:50:30,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:30,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-05 09:50:30,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2025-02-05 09:50:30,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2025-02-05 09:50:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 09:50:30,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:31,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:50:31,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2025-02-05 09:50:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 09:50:31,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576982021] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:31,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:31,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 38 [2025-02-05 09:50:31,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603640377] [2025-02-05 09:50:31,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:31,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-05 09:50:31,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:31,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-05 09:50:31,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 09:50:31,598 INFO L87 Difference]: Start difference. First operand 308 states and 413 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:32,784 INFO L93 Difference]: Finished difference Result 555 states and 740 transitions. [2025-02-05 09:50:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-05 09:50:32,785 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2025-02-05 09:50:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:32,786 INFO L225 Difference]: With dead ends: 555 [2025-02-05 09:50:32,786 INFO L226 Difference]: Without dead ends: 425 [2025-02-05 09:50:32,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=339, Invalid=2417, Unknown=0, NotChecked=0, Total=2756 [2025-02-05 09:50:32,787 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 142 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:32,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1044 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 09:50:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2025-02-05 09:50:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 328. [2025-02-05 09:50:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 316 states have (on average 1.3417721518987342) internal successors, (424), 319 states have internal predecessors, (424), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 439 transitions. [2025-02-05 09:50:32,853 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 439 transitions. Word has length 50 [2025-02-05 09:50:32,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:32,853 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 439 transitions. [2025-02-05 09:50:32,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 439 transitions. [2025-02-05 09:50:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 09:50:32,854 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:32,854 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:32,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-02-05 09:50:33,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-02-05 09:50:33,055 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:33,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2114727153, now seen corresponding path program 4 times [2025-02-05 09:50:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:33,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271566649] [2025-02-05 09:50:33,055 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 09:50:33,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:33,066 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-02-05 09:50:33,090 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 09:50:33,090 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 09:50:33,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 09:50:33,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:33,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271566649] [2025-02-05 09:50:33,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271566649] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:33,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204573912] [2025-02-05 09:50:33,590 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 09:50:33,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:33,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:33,592 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:33,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-05 09:50:33,669 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-02-05 09:50:33,798 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 09:50:33,799 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 09:50:33,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:33,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-02-05 09:50:33,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:33,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-05 09:50:34,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2025-02-05 09:50:34,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2025-02-05 09:50:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:34,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:34,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:50:34,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2025-02-05 09:50:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 09:50:35,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204573912] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:35,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:35,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 18] total 48 [2025-02-05 09:50:35,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041135926] [2025-02-05 09:50:35,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:35,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-05 09:50:35,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:35,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-05 09:50:35,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2018, Unknown=0, NotChecked=0, Total=2256 [2025-02-05 09:50:35,069 INFO L87 Difference]: Start difference. First operand 328 states and 439 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:36,052 INFO L93 Difference]: Finished difference Result 437 states and 581 transitions. [2025-02-05 09:50:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 09:50:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2025-02-05 09:50:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:36,054 INFO L225 Difference]: With dead ends: 437 [2025-02-05 09:50:36,054 INFO L226 Difference]: Without dead ends: 397 [2025-02-05 09:50:36,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 09:50:36,055 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 159 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:36,055 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1240 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 09:50:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2025-02-05 09:50:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 334. [2025-02-05 09:50:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 322 states have (on average 1.3416149068322982) internal successors, (432), 325 states have internal predecessors, (432), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 447 transitions. [2025-02-05 09:50:36,118 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 447 transitions. Word has length 50 [2025-02-05 09:50:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:36,118 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 447 transitions. [2025-02-05 09:50:36,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 447 transitions. [2025-02-05 09:50:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 09:50:36,119 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:36,119 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:36,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-05 09:50:36,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-02-05 09:50:36,320 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:36,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:36,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1312564235, now seen corresponding path program 5 times [2025-02-05 09:50:36,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:36,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783044697] [2025-02-05 09:50:36,321 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 09:50:36,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:36,330 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 4 equivalence classes. [2025-02-05 09:50:36,354 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 09:50:36,355 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 09:50:36,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 09:50:36,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:36,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783044697] [2025-02-05 09:50:36,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783044697] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:36,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908417726] [2025-02-05 09:50:36,808 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 09:50:36,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:36,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:36,810 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:36,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-05 09:50:36,885 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 4 equivalence classes. [2025-02-05 09:50:36,982 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 09:50:36,982 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 09:50:36,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:36,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-02-05 09:50:36,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:37,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-02-05 09:50:37,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2025-02-05 09:50:37,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2025-02-05 09:50:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 09:50:37,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:37,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:50:37,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2025-02-05 09:50:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 09:50:38,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908417726] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:38,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:38,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 18] total 47 [2025-02-05 09:50:38,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999345225] [2025-02-05 09:50:38,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:38,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-02-05 09:50:38,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:38,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-02-05 09:50:38,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2001, Unknown=0, NotChecked=0, Total=2162 [2025-02-05 09:50:38,252 INFO L87 Difference]: Start difference. First operand 334 states and 447 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:39,690 INFO L93 Difference]: Finished difference Result 522 states and 696 transitions. [2025-02-05 09:50:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 09:50:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2025-02-05 09:50:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:39,692 INFO L225 Difference]: With dead ends: 522 [2025-02-05 09:50:39,692 INFO L226 Difference]: Without dead ends: 401 [2025-02-05 09:50:39,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=356, Invalid=3934, Unknown=0, NotChecked=0, Total=4290 [2025-02-05 09:50:39,693 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 160 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:39,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1351 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-05 09:50:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2025-02-05 09:50:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 352. [2025-02-05 09:50:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 340 states have (on average 1.3352941176470587) internal successors, (454), 343 states have internal predecessors, (454), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 09:50:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 469 transitions. [2025-02-05 09:50:39,766 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 469 transitions. Word has length 50 [2025-02-05 09:50:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:39,766 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 469 transitions. [2025-02-05 09:50:39,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 469 transitions. [2025-02-05 09:50:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-05 09:50:39,767 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:39,767 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:39,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-02-05 09:50:39,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2025-02-05 09:50:39,967 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:39,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1309348251, now seen corresponding path program 1 times [2025-02-05 09:50:39,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:39,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974142392] [2025-02-05 09:50:39,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:39,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-05 09:50:39,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 09:50:39,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:39,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 09:50:40,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:40,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974142392] [2025-02-05 09:50:40,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974142392] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:40,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422289854] [2025-02-05 09:50:40,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:40,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:40,452 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:40,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-02-05 09:50:40,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-05 09:50:40,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 09:50:40,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:40,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:40,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-05 09:50:40,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:44,730 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1|) 0) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|) 0))) is different from true [2025-02-05 09:50:44,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 09:50:44,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-05 09:50:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:44,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:45,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:50:45,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2025-02-05 09:50:45,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:50:45,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2025-02-05 09:50:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:45,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422289854] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:45,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:45,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 10] total 36 [2025-02-05 09:50:45,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642343844] [2025-02-05 09:50:45,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:45,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-05 09:50:45,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:45,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-05 09:50:45,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1088, Unknown=1, NotChecked=66, Total=1260 [2025-02-05 09:50:45,166 INFO L87 Difference]: Start difference. First operand 352 states and 469 transitions. Second operand has 36 states, 34 states have (on average 2.588235294117647) internal successors, (88), 36 states have internal predecessors, (88), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-05 09:50:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:47,002 INFO L93 Difference]: Finished difference Result 557 states and 744 transitions. [2025-02-05 09:50:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-02-05 09:50:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.588235294117647) internal successors, (88), 36 states have internal predecessors, (88), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 53 [2025-02-05 09:50:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:47,004 INFO L225 Difference]: With dead ends: 557 [2025-02-05 09:50:47,004 INFO L226 Difference]: Without dead ends: 482 [2025-02-05 09:50:47,005 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=550, Invalid=4565, Unknown=1, NotChecked=140, Total=5256 [2025-02-05 09:50:47,005 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 268 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:47,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 830 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 936 Invalid, 0 Unknown, 353 Unchecked, 0.5s Time] [2025-02-05 09:50:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2025-02-05 09:50:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 374. [2025-02-05 09:50:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 360 states have (on average 1.3222222222222222) internal successors, (476), 363 states have internal predecessors, (476), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 493 transitions. [2025-02-05 09:50:47,086 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 493 transitions. Word has length 53 [2025-02-05 09:50:47,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:47,086 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 493 transitions. [2025-02-05 09:50:47,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.588235294117647) internal successors, (88), 36 states have internal predecessors, (88), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-05 09:50:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 493 transitions. [2025-02-05 09:50:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 09:50:47,088 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:47,088 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:47,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-02-05 09:50:47,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:47,289 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:47,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash -354194368, now seen corresponding path program 1 times [2025-02-05 09:50:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:47,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169961143] [2025-02-05 09:50:47,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:47,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 09:50:47,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 09:50:47,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:47,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-05 09:50:47,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:47,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169961143] [2025-02-05 09:50:47,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169961143] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:47,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579581617] [2025-02-05 09:50:47,414 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:47,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:47,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:47,416 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:47,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-02-05 09:50:47,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 09:50:47,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 09:50:47,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:47,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:47,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 09:50:47,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 09:50:47,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 09:50:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579581617] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:47,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 30 [2025-02-05 09:50:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371236061] [2025-02-05 09:50:47,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:47,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 09:50:47,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:47,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 09:50:47,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2025-02-05 09:50:47,968 INFO L87 Difference]: Start difference. First operand 374 states and 493 transitions. Second operand has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:50:48,839 INFO L93 Difference]: Finished difference Result 747 states and 985 transitions. [2025-02-05 09:50:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 09:50:48,840 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2025-02-05 09:50:48,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:50:48,841 INFO L225 Difference]: With dead ends: 747 [2025-02-05 09:50:48,841 INFO L226 Difference]: Without dead ends: 577 [2025-02-05 09:50:48,842 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2025-02-05 09:50:48,843 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 70 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 09:50:48,843 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1498 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 09:50:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2025-02-05 09:50:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 469. [2025-02-05 09:50:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 455 states have (on average 1.3186813186813187) internal successors, (600), 458 states have internal predecessors, (600), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 09:50:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 617 transitions. [2025-02-05 09:50:48,934 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 617 transitions. Word has length 51 [2025-02-05 09:50:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:50:48,935 INFO L471 AbstractCegarLoop]: Abstraction has 469 states and 617 transitions. [2025-02-05 09:50:48,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 09:50:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 617 transitions. [2025-02-05 09:50:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 09:50:48,936 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:50:48,936 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:50:48,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-02-05 09:50:49,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2025-02-05 09:50:49,136 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:50:49,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:50:49,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1823147916, now seen corresponding path program 1 times [2025-02-05 09:50:49,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:50:49,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703480142] [2025-02-05 09:50:49,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:49,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:50:49,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 09:50:49,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 09:50:49,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:49,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:49,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:50:49,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703480142] [2025-02-05 09:50:49,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703480142] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:50:49,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307898255] [2025-02-05 09:50:49,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:50:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:50:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:50:49,591 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:50:49,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-02-05 09:50:49,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 09:50:49,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 09:50:49,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:50:49,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:50:49,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-05 09:50:49,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:50:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 09:50:50,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:50:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 09:50:51,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307898255] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:50:51,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:50:51,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 35 [2025-02-05 09:50:51,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514556476] [2025-02-05 09:50:51,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:50:51,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-05 09:50:51,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:50:51,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-05 09:50:51,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2025-02-05 09:50:51,179 INFO L87 Difference]: Start difference. First operand 469 states and 617 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 09:51:17,383 WARN L286 SmtUtils]: Spent 12.10s on a formula simplification. DAG size of input: 55 DAG size of output: 50 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)