./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 03:18:59,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:18:59,670 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:18:59,673 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:18:59,674 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:18:59,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:18:59,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:18:59,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:18:59,702 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:18:59,702 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:18:59,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:18:59,702 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:18:59,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:18:59,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:18:59,702 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:18:59,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:18:59,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:18:59,703 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:18:59,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:18:59,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:18:59,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:18:59,704 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:18:59,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:18:59,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:18:59,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:18:59,704 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:18:59,704 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:18:59,704 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:18:59,705 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:18:59,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:18:59,705 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:18:59,705 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:18:59,705 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:18:59,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:18:59,705 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 -> 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b [2025-01-09 03:18:59,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:18:59,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:18:59,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:18:59,894 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:18:59,894 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:18:59,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2025-01-09 03:19:01,017 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e57d4d0aa/04cdeaa4d78e43b49a1ff4f4039871ca/FLAGd8f1b4e67 [2025-01-09 03:19:01,277 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:19:01,277 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2025-01-09 03:19:01,286 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e57d4d0aa/04cdeaa4d78e43b49a1ff4f4039871ca/FLAGd8f1b4e67 [2025-01-09 03:19:01,588 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e57d4d0aa/04cdeaa4d78e43b49a1ff4f4039871ca [2025-01-09 03:19:01,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:19:01,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:19:01,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:19:01,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:19:01,594 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:19:01,595 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd3c4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01, skipping insertion in model container [2025-01-09 03:19:01,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,604 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:19:01,698 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2025-01-09 03:19:01,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:19:01,723 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:19:01,729 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2025-01-09 03:19:01,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:19:01,749 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:19:01,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01 WrapperNode [2025-01-09 03:19:01,750 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:19:01,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:19:01,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:19:01,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:19:01,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,759 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,771 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2025-01-09 03:19:01,772 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:19:01,773 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:19:01,773 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:19:01,773 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:19:01,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,784 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,796 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 03:19:01,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,798 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,801 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,802 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:19:01,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:19:01,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:19:01,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:19:01,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (1/1) ... [2025-01-09 03:19:01,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:19:01,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:01,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 03:19:01,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 03:19:01,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:19:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 03:19:01,847 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 03:19:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:19:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:19:01,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:19:01,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 03:19:01,847 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 03:19:01,883 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:19:01,884 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:19:02,010 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-01-09 03:19:02,010 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:19:02,018 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:19:02,018 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2025-01-09 03:19:02,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:19:02 BoogieIcfgContainer [2025-01-09 03:19:02,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:19:02,021 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:19:02,021 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:19:02,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:19:02,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:19:01" (1/3) ... [2025-01-09 03:19:02,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35de8588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:19:02, skipping insertion in model container [2025-01-09 03:19:02,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:19:01" (2/3) ... [2025-01-09 03:19:02,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35de8588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:19:02, skipping insertion in model container [2025-01-09 03:19:02,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:19:02" (3/3) ... [2025-01-09 03:19:02,027 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2025-01-09 03:19:02,036 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:19:02,038 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_unwindbound50.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-09 03:19:02,076 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:19:02,087 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;@63f9a481, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:19:02,088 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:19:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-09 03:19:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-09 03:19:02,095 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:02,095 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:02,095 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:02,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2025-01-09 03:19:02,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:02,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636206432] [2025-01-09 03:19:02,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:02,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:02,151 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 03:19:02,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:19:02,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:02,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:19:02,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:02,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636206432] [2025-01-09 03:19:02,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636206432] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:02,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893409220] [2025-01-09 03:19:02,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:02,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:02,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:02,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:02,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 03:19:02,260 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 03:19:02,279 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:19:02,279 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:02,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:02,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 03:19:02,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:19:02,297 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:19:02,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893409220] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:02,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:19:02,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 03:19:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796177039] [2025-01-09 03:19:02,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:02,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 03:19:02,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:02,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 03:19:02,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:19:02,316 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2025-01-09 03:19:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:02,329 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2025-01-09 03:19:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 03:19:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 18 [2025-01-09 03:19:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:02,336 INFO L225 Difference]: With dead ends: 67 [2025-01-09 03:19:02,336 INFO L226 Difference]: Without dead ends: 31 [2025-01-09 03:19:02,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:19:02,341 INFO L435 NwaCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:02,342 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-01-09 03:19:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-01-09 03:19:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:19:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2025-01-09 03:19:02,368 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2025-01-09 03:19:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:02,368 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2025-01-09 03:19:02,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2025-01-09 03:19:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2025-01-09 03:19:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-01-09 03:19:02,370 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:02,370 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:02,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 03:19:02,574 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 [2025-01-09 03:19:02,575 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:02,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:02,576 INFO L85 PathProgramCache]: Analyzing trace with hash 986042158, now seen corresponding path program 1 times [2025-01-09 03:19:02,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:02,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533058394] [2025-01-09 03:19:02,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:02,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:02,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-09 03:19:02,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 03:19:02,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:02,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533058394] [2025-01-09 03:19:02,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533058394] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:02,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:02,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 03:19:02,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912194054] [2025-01-09 03:19:02,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:02,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 03:19:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:02,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 03:19:02,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:19:02,666 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2025-01-09 03:19:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:02,681 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2025-01-09 03:19:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:19:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 19 [2025-01-09 03:19:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:02,682 INFO L225 Difference]: With dead ends: 40 [2025-01-09 03:19:02,682 INFO L226 Difference]: Without dead ends: 33 [2025-01-09 03:19:02,682 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 [2025-01-09 03:19:02,683 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:02,683 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-01-09 03:19:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-01-09 03:19:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:19:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2025-01-09 03:19:02,687 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2025-01-09 03:19:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:02,688 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2025-01-09 03:19:02,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2025-01-09 03:19:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2025-01-09 03:19:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-09 03:19:02,689 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:02,689 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:02,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 03:19:02,689 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:02,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 368384092, now seen corresponding path program 1 times [2025-01-09 03:19:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664834342] [2025-01-09 03:19:02,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:02,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:02,694 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 03:19:02,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 03:19:02,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:02,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:19:02,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:02,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664834342] [2025-01-09 03:19:02,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664834342] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:02,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:02,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 03:19:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842207570] [2025-01-09 03:19:02,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:02,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 03:19:02,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:02,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 03:19:02,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:02,825 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:19:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:02,915 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2025-01-09 03:19:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:19:02,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2025-01-09 03:19:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:02,916 INFO L225 Difference]: With dead ends: 53 [2025-01-09 03:19:02,916 INFO L226 Difference]: Without dead ends: 46 [2025-01-09 03:19:02,917 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:02,917 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:02,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 119 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:19:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-01-09 03:19:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2025-01-09 03:19:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:19:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2025-01-09 03:19:02,922 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2025-01-09 03:19:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:02,922 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2025-01-09 03:19:02,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:19:02,923 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2025-01-09 03:19:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 03:19:02,923 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:02,923 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] [2025-01-09 03:19:02,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 03:19:02,923 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:02,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1914665021, now seen corresponding path program 1 times [2025-01-09 03:19:02,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:02,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901152637] [2025-01-09 03:19:02,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:02,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 03:19:02,945 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 03:19:02,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:02,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:02,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807386344] [2025-01-09 03:19:02,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:02,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:02,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:02,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:02,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 03:19:02,984 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 03:19:03,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 03:19:03,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:03,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:03,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:19:03,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:03,116 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:19:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:03,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901152637] [2025-01-09 03:19:03,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:03,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807386344] [2025-01-09 03:19:03,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807386344] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:03,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:19:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424020716] [2025-01-09 03:19:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:03,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:19:03,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:03,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:19:03,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:19:03,118 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2025-01-09 03:19:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:03,148 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2025-01-09 03:19:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:19:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2025-01-09 03:19:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:03,149 INFO L225 Difference]: With dead ends: 52 [2025-01-09 03:19:03,149 INFO L226 Difference]: Without dead ends: 50 [2025-01-09 03:19:03,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:03,150 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:03,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-01-09 03:19:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2025-01-09 03:19:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-09 03:19:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2025-01-09 03:19:03,156 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 25 [2025-01-09 03:19:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:03,156 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2025-01-09 03:19:03,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2025-01-09 03:19:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2025-01-09 03:19:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 03:19:03,157 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:03,157 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] [2025-01-09 03:19:03,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 03:19:03,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:03,361 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:03,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:03,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1120743530, now seen corresponding path program 1 times [2025-01-09 03:19:03,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:03,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243248678] [2025-01-09 03:19:03,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:03,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 03:19:03,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 03:19:03,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:03,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:03,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:03,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243248678] [2025-01-09 03:19:03,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243248678] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:03,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:03,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:19:03,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693127765] [2025-01-09 03:19:03,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:03,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:19:03,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:03,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:19:03,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:19:03,420 INFO L87 Difference]: Start difference. First operand 49 states and 66 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) [2025-01-09 03:19:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:03,449 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2025-01-09 03:19:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:19:03,450 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 [2025-01-09 03:19:03,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:03,451 INFO L225 Difference]: With dead ends: 73 [2025-01-09 03:19:03,451 INFO L226 Difference]: Without dead ends: 51 [2025-01-09 03:19:03,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:19:03,452 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:03,456 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-01-09 03:19:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-01-09 03:19:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-09 03:19:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2025-01-09 03:19:03,465 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2025-01-09 03:19:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:03,466 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2025-01-09 03:19:03,466 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) [2025-01-09 03:19:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2025-01-09 03:19:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-09 03:19:03,466 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:03,466 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] [2025-01-09 03:19:03,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 03:19:03,467 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:03,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash -495940029, now seen corresponding path program 1 times [2025-01-09 03:19:03,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:03,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043793205] [2025-01-09 03:19:03,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:03,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:03,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-09 03:19:03,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 03:19:03,480 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:03,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:03,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:03,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043793205] [2025-01-09 03:19:03,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043793205] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:03,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425382287] [2025-01-09 03:19:03,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:03,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:03,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:03,538 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:03,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 03:19:03,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-09 03:19:03,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 03:19:03,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:03,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:03,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:19:03,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:03,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425382287] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:03,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:19:03,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-01-09 03:19:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556598432] [2025-01-09 03:19:03,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:03,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 03:19:03,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:03,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 03:19:03,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-01-09 03:19:03,675 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 03:19:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:03,800 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2025-01-09 03:19:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 03:19:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2025-01-09 03:19:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:03,801 INFO L225 Difference]: With dead ends: 147 [2025-01-09 03:19:03,801 INFO L226 Difference]: Without dead ends: 140 [2025-01-09 03:19:03,802 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2025-01-09 03:19:03,802 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:03,802 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 234 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:19:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-01-09 03:19:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2025-01-09 03:19:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2025-01-09 03:19:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2025-01-09 03:19:03,816 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2025-01-09 03:19:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:03,817 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2025-01-09 03:19:03,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 03:19:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2025-01-09 03:19:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-09 03:19:03,817 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:03,817 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] [2025-01-09 03:19:03,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 03:19:04,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:04,022 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:04,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1671576551, now seen corresponding path program 1 times [2025-01-09 03:19:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:04,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925717036] [2025-01-09 03:19:04,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:04,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:04,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 03:19:04,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 03:19:04,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:04,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:19:04,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:04,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925717036] [2025-01-09 03:19:04,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925717036] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:04,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241222546] [2025-01-09 03:19:04,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:04,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:04,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:04,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:04,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 03:19:04,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 03:19:04,157 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 03:19:04,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:04,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:04,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:19:04,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:19:04,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:19:04,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241222546] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:04,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:19:04,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-01-09 03:19:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188273909] [2025-01-09 03:19:04,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:04,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 03:19:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:04,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 03:19:04,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:19:04,258 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 03:19:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:04,411 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2025-01-09 03:19:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 03:19:04,411 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-01-09 03:19:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:04,412 INFO L225 Difference]: With dead ends: 183 [2025-01-09 03:19:04,412 INFO L226 Difference]: Without dead ends: 171 [2025-01-09 03:19:04,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:19:04,413 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 113 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:04,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 293 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:19:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-01-09 03:19:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2025-01-09 03:19:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-01-09 03:19:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2025-01-09 03:19:04,436 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2025-01-09 03:19:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:04,437 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2025-01-09 03:19:04,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 03:19:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2025-01-09 03:19:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-09 03:19:04,437 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:04,437 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] [2025-01-09 03:19:04,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 03:19:04,642 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,SelfDestructingSolverStorable6 [2025-01-09 03:19:04,642 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:04,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash -544486195, now seen corresponding path program 1 times [2025-01-09 03:19:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:04,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419797802] [2025-01-09 03:19:04,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:04,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:04,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 03:19:04,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 03:19:04,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:04,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:04,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208337848] [2025-01-09 03:19:04,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:04,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:04,657 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:04,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 03:19:04,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 03:19:04,695 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 03:19:04,695 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:04,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:04,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:19:04,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:04,785 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:19:04,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419797802] [2025-01-09 03:19:04,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208337848] [2025-01-09 03:19:04,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208337848] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:04,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:04,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:19:04,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856176843] [2025-01-09 03:19:04,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:04,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:19:04,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:04,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:19:04,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:19:04,786 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 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) [2025-01-09 03:19:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:04,825 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2025-01-09 03:19:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:19:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 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 30 [2025-01-09 03:19:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:04,826 INFO L225 Difference]: With dead ends: 143 [2025-01-09 03:19:04,826 INFO L226 Difference]: Without dead ends: 141 [2025-01-09 03:19:04,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:04,827 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:04,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-01-09 03:19:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2025-01-09 03:19:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-01-09 03:19:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2025-01-09 03:19:04,839 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2025-01-09 03:19:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:04,839 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2025-01-09 03:19:04,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 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) [2025-01-09 03:19:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2025-01-09 03:19:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-09 03:19:04,840 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:04,840 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:04,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 03:19:05,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:05,044 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:05,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1797448472, now seen corresponding path program 1 times [2025-01-09 03:19:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:05,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035846564] [2025-01-09 03:19:05,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:05,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 03:19:05,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 03:19:05,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:05,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:05,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971545531] [2025-01-09 03:19:05,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:05,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:05,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:05,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:05,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 03:19:05,077 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 03:19:05,089 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 03:19:05,089 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:05,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:05,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 03:19:05,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:05,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:05,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:05,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035846564] [2025-01-09 03:19:05,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:05,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971545531] [2025-01-09 03:19:05,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971545531] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:05,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:19:05,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-01-09 03:19:05,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954135226] [2025-01-09 03:19:05,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:05,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 03:19:05,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:05,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 03:19:05,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:19:05,415 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:19:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:05,513 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2025-01-09 03:19:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:19:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 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 [2025-01-09 03:19:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:05,515 INFO L225 Difference]: With dead ends: 175 [2025-01-09 03:19:05,515 INFO L226 Difference]: Without dead ends: 173 [2025-01-09 03:19:05,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:19:05,515 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:05,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 264 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:19:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2025-01-09 03:19:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2025-01-09 03:19:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2025-01-09 03:19:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2025-01-09 03:19:05,530 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2025-01-09 03:19:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:05,530 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2025-01-09 03:19:05,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:19:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2025-01-09 03:19:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-09 03:19:05,531 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:05,531 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] [2025-01-09 03:19:05,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 03:19:05,736 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,SelfDestructingSolverStorable8 [2025-01-09 03:19:05,736 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:05,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:05,737 INFO L85 PathProgramCache]: Analyzing trace with hash -352567575, now seen corresponding path program 1 times [2025-01-09 03:19:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:05,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568479254] [2025-01-09 03:19:05,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:05,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:05,744 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 03:19:05,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 03:19:05,750 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:05,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:05,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568479254] [2025-01-09 03:19:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568479254] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:05,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:05,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 03:19:05,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468907370] [2025-01-09 03:19:05,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:05,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 03:19:05,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:05,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 03:19:05,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:05,799 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2025-01-09 03:19:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:05,829 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2025-01-09 03:19:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:19:05,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 32 [2025-01-09 03:19:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:05,830 INFO L225 Difference]: With dead ends: 237 [2025-01-09 03:19:05,830 INFO L226 Difference]: Without dead ends: 170 [2025-01-09 03:19:05,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:05,831 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:05,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-01-09 03:19:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2025-01-09 03:19:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2025-01-09 03:19:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2025-01-09 03:19:05,853 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2025-01-09 03:19:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:05,853 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2025-01-09 03:19:05,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2025-01-09 03:19:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2025-01-09 03:19:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-01-09 03:19:05,854 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:05,855 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-01-09 03:19:05,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-01-09 03:19:05,855 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:05,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:05,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1336855101, now seen corresponding path program 1 times [2025-01-09 03:19:05,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:05,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198954468] [2025-01-09 03:19:05,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:05,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:05,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-01-09 03:19:05,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-01-09 03:19:05,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:05,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:05,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513909152] [2025-01-09 03:19:05,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:05,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:05,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:05,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 03:19:05,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-01-09 03:19:05,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-01-09 03:19:05,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:05,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:05,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:19:05,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 03:19:05,945 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:19:05,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:05,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198954468] [2025-01-09 03:19:05,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:05,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513909152] [2025-01-09 03:19:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513909152] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:05,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:05,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:19:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24575815] [2025-01-09 03:19:05,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:05,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:19:05,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:05,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:19:05,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:19:05,947 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 03:19:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:05,998 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2025-01-09 03:19:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:19:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2025-01-09 03:19:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:06,000 INFO L225 Difference]: With dead ends: 235 [2025-01-09 03:19:06,000 INFO L226 Difference]: Without dead ends: 233 [2025-01-09 03:19:06,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:06,001 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:06,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2025-01-09 03:19:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2025-01-09 03:19:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2025-01-09 03:19:06,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2025-01-09 03:19:06,035 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2025-01-09 03:19:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:06,035 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2025-01-09 03:19:06,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 03:19:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2025-01-09 03:19:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-09 03:19:06,037 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:06,037 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] [2025-01-09 03:19:06,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 03:19:06,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:06,237 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:06,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:06,238 INFO L85 PathProgramCache]: Analyzing trace with hash -711573864, now seen corresponding path program 1 times [2025-01-09 03:19:06,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:06,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205005350] [2025-01-09 03:19:06,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:06,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:06,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 03:19:06,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 03:19:06,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:06,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:06,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461203256] [2025-01-09 03:19:06,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:06,259 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) [2025-01-09 03:19:06,260 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 [2025-01-09 03:19:06,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 03:19:06,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 03:19:06,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:06,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:06,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-09 03:19:06,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:19:06,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:06,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:06,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205005350] [2025-01-09 03:19:06,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:06,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461203256] [2025-01-09 03:19:06,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461203256] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:06,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:19:06,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2025-01-09 03:19:06,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217279137] [2025-01-09 03:19:06,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:06,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 03:19:06,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:06,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 03:19:06,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2025-01-09 03:19:06,498 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 03:19:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:06,655 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2025-01-09 03:19:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 03:19:06,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2025-01-09 03:19:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:06,656 INFO L225 Difference]: With dead ends: 238 [2025-01-09 03:19:06,656 INFO L226 Difference]: Without dead ends: 236 [2025-01-09 03:19:06,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:19:06,657 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 68 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:06,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 264 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:19:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2025-01-09 03:19:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2025-01-09 03:19:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 166 states have (on average 1.355421686746988) internal successors, (225), 167 states have internal predecessors, (225), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2025-01-09 03:19:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2025-01-09 03:19:06,673 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 37 [2025-01-09 03:19:06,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:06,673 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2025-01-09 03:19:06,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 03:19:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2025-01-09 03:19:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-09 03:19:06,673 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:06,674 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-01-09 03:19:06,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 03:19:06,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:06,875 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:06,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1366159795, now seen corresponding path program 1 times [2025-01-09 03:19:06,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:06,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998599211] [2025-01-09 03:19:06,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:06,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:06,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-09 03:19:06,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 03:19:06,882 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:06,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:06,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412896980] [2025-01-09 03:19:06,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:06,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:06,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:06,889 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) [2025-01-09 03:19:06,891 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 [2025-01-09 03:19:06,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-09 03:19:06,922 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 03:19:06,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:06,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:06,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:19:06,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 03:19:06,956 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:19:06,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:06,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998599211] [2025-01-09 03:19:06,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:06,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412896980] [2025-01-09 03:19:06,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412896980] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:06,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:06,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:19:06,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411794849] [2025-01-09 03:19:06,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:06,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:19:06,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:06,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:19:06,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:19:06,957 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 03:19:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:07,000 INFO L93 Difference]: Finished difference Result 309 states and 454 transitions. [2025-01-09 03:19:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:19:07,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2025-01-09 03:19:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:07,002 INFO L225 Difference]: With dead ends: 309 [2025-01-09 03:19:07,002 INFO L226 Difference]: Without dead ends: 307 [2025-01-09 03:19:07,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:07,003 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:07,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2025-01-09 03:19:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 292. [2025-01-09 03:19:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 187 states have (on average 1.358288770053476) internal successors, (254), 197 states have internal predecessors, (254), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2025-01-09 03:19:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 427 transitions. [2025-01-09 03:19:07,043 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 427 transitions. Word has length 40 [2025-01-09 03:19:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:07,044 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 427 transitions. [2025-01-09 03:19:07,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 03:19:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 427 transitions. [2025-01-09 03:19:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-01-09 03:19:07,044 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:07,044 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:07,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 03:19:07,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:07,249 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:07,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:07,249 INFO L85 PathProgramCache]: Analyzing trace with hash 493677206, now seen corresponding path program 1 times [2025-01-09 03:19:07,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:07,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78669766] [2025-01-09 03:19:07,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:07,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:07,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 03:19:07,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 03:19:07,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:07,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:07,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:07,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78669766] [2025-01-09 03:19:07,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78669766] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:07,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600512976] [2025-01-09 03:19:07,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:07,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:07,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:07,352 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) [2025-01-09 03:19:07,363 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 [2025-01-09 03:19:07,388 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 03:19:07,402 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 03:19:07,403 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:07,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:07,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:19:07,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:07,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:07,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600512976] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:07,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:19:07,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2025-01-09 03:19:07,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577395332] [2025-01-09 03:19:07,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:07,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 03:19:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:07,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 03:19:07,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:19:07,509 INFO L87 Difference]: Start difference. First operand 292 states and 427 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 03:19:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:07,763 INFO L93 Difference]: Finished difference Result 1094 states and 1585 transitions. [2025-01-09 03:19:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 03:19:07,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2025-01-09 03:19:07,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:07,770 INFO L225 Difference]: With dead ends: 1094 [2025-01-09 03:19:07,770 INFO L226 Difference]: Without dead ends: 897 [2025-01-09 03:19:07,772 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:19:07,772 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 195 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:07,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 263 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:19:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2025-01-09 03:19:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 858. [2025-01-09 03:19:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 568 states have (on average 1.2922535211267605) internal successors, (734), 591 states have internal predecessors, (734), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2025-01-09 03:19:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1192 transitions. [2025-01-09 03:19:07,873 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1192 transitions. Word has length 38 [2025-01-09 03:19:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:07,873 INFO L471 AbstractCegarLoop]: Abstraction has 858 states and 1192 transitions. [2025-01-09 03:19:07,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 03:19:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1192 transitions. [2025-01-09 03:19:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-01-09 03:19:07,874 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:07,874 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:07,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-09 03:19:08,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-01-09 03:19:08,075 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:08,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash 324624832, now seen corresponding path program 1 times [2025-01-09 03:19:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256372043] [2025-01-09 03:19:08,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:08,079 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 03:19:08,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 03:19:08,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:08,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:08,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:08,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256372043] [2025-01-09 03:19:08,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256372043] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:08,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384351758] [2025-01-09 03:19:08,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:08,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:08,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:08,145 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) [2025-01-09 03:19:08,151 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 [2025-01-09 03:19:08,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 03:19:08,183 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 03:19:08,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:08,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:08,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:19:08,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:08,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:08,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384351758] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:08,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:19:08,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2025-01-09 03:19:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838714737] [2025-01-09 03:19:08,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:08,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:19:08,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:08,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:19:08,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:19:08,281 INFO L87 Difference]: Start difference. First operand 858 states and 1192 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 03:19:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:08,508 INFO L93 Difference]: Finished difference Result 1267 states and 1779 transitions. [2025-01-09 03:19:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 03:19:08,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2025-01-09 03:19:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:08,514 INFO L225 Difference]: With dead ends: 1267 [2025-01-09 03:19:08,514 INFO L226 Difference]: Without dead ends: 863 [2025-01-09 03:19:08,516 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2025-01-09 03:19:08,517 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 117 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:08,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 236 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:19:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2025-01-09 03:19:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 855. [2025-01-09 03:19:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 565 states have (on average 1.2601769911504426) internal successors, (712), 588 states have internal predecessors, (712), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2025-01-09 03:19:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1170 transitions. [2025-01-09 03:19:08,584 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1170 transitions. Word has length 38 [2025-01-09 03:19:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:08,584 INFO L471 AbstractCegarLoop]: Abstraction has 855 states and 1170 transitions. [2025-01-09 03:19:08,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 03:19:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1170 transitions. [2025-01-09 03:19:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 03:19:08,586 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:08,586 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:08,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 03:19:08,787 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,SelfDestructingSolverStorable14 [2025-01-09 03:19:08,787 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:08,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:08,788 INFO L85 PathProgramCache]: Analyzing trace with hash 139988515, now seen corresponding path program 2 times [2025-01-09 03:19:08,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:08,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635572923] [2025-01-09 03:19:08,788 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:19:08,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:08,792 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-01-09 03:19:08,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:19:08,797 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:19:08,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:19:08,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:08,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635572923] [2025-01-09 03:19:08,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635572923] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:08,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:08,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:19:08,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731418967] [2025-01-09 03:19:08,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:08,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:19:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:08,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:19:08,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:19:08,830 INFO L87 Difference]: Start difference. First operand 855 states and 1170 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2025-01-09 03:19:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:08,939 INFO L93 Difference]: Finished difference Result 1147 states and 1612 transitions. [2025-01-09 03:19:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:19:08,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 [2025-01-09 03:19:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:08,944 INFO L225 Difference]: With dead ends: 1147 [2025-01-09 03:19:08,944 INFO L226 Difference]: Without dead ends: 911 [2025-01-09 03:19:08,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:19:08,945 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:08,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 181 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2025-01-09 03:19:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 803. [2025-01-09 03:19:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 533 states have (on average 1.24953095684803) internal successors, (666), 555 states have internal predecessors, (666), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2025-01-09 03:19:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1084 transitions. [2025-01-09 03:19:09,017 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1084 transitions. Word has length 39 [2025-01-09 03:19:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:09,017 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 1084 transitions. [2025-01-09 03:19:09,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2025-01-09 03:19:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1084 transitions. [2025-01-09 03:19:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-01-09 03:19:09,018 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:09,018 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2025-01-09 03:19:09,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-01-09 03:19:09,018 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:09,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash 883594140, now seen corresponding path program 1 times [2025-01-09 03:19:09,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:09,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833066645] [2025-01-09 03:19:09,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:09,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:09,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 03:19:09,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 03:19:09,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:09,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:09,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604278096] [2025-01-09 03:19:09,031 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:09,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:09,033 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) [2025-01-09 03:19:09,038 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 [2025-01-09 03:19:09,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 03:19:09,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 03:19:09,081 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:09,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:09,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-01-09 03:19:09,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 03:19:09,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 03:19:10,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:10,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833066645] [2025-01-09 03:19:10,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:10,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604278096] [2025-01-09 03:19:10,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604278096] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:10,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:19:10,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-01-09 03:19:10,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10595898] [2025-01-09 03:19:10,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:10,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 03:19:10,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:10,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 03:19:10,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-01-09 03:19:10,050 INFO L87 Difference]: Start difference. First operand 803 states and 1084 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-01-09 03:19:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:12,544 INFO L93 Difference]: Finished difference Result 1218 states and 1723 transitions. [2025-01-09 03:19:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-01-09 03:19:12,545 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2025-01-09 03:19:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:12,550 INFO L225 Difference]: With dead ends: 1218 [2025-01-09 03:19:12,550 INFO L226 Difference]: Without dead ends: 1196 [2025-01-09 03:19:12,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2025-01-09 03:19:12,551 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 336 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:12,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1127 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-09 03:19:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2025-01-09 03:19:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 885. [2025-01-09 03:19:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 592 states have (on average 1.2533783783783783) internal successors, (742), 612 states have internal predecessors, (742), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2025-01-09 03:19:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1199 transitions. [2025-01-09 03:19:12,672 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1199 transitions. Word has length 54 [2025-01-09 03:19:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:12,672 INFO L471 AbstractCegarLoop]: Abstraction has 885 states and 1199 transitions. [2025-01-09 03:19:12,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-01-09 03:19:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1199 transitions. [2025-01-09 03:19:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-01-09 03:19:12,673 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:12,673 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2025-01-09 03:19:12,682 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 [2025-01-09 03:19:12,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 03:19:12,877 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:12,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:12,878 INFO L85 PathProgramCache]: Analyzing trace with hash -506026557, now seen corresponding path program 1 times [2025-01-09 03:19:12,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:12,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872772811] [2025-01-09 03:19:12,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:12,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:12,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-01-09 03:19:12,885 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-01-09 03:19:12,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:12,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 03:19:13,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872772811] [2025-01-09 03:19:13,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872772811] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133874652] [2025-01-09 03:19:13,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:13,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:13,075 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) [2025-01-09 03:19:13,076 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 [2025-01-09 03:19:13,100 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-01-09 03:19:13,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-01-09 03:19:13,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:13,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:13,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 03:19:13,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 03:19:13,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 03:19:13,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133874652] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:13,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:19:13,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2025-01-09 03:19:13,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847351674] [2025-01-09 03:19:13,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:13,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 03:19:13,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:13,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 03:19:13,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2025-01-09 03:19:13,317 INFO L87 Difference]: Start difference. First operand 885 states and 1199 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-01-09 03:19:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:13,852 INFO L93 Difference]: Finished difference Result 1906 states and 2713 transitions. [2025-01-09 03:19:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 03:19:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 60 [2025-01-09 03:19:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:13,861 INFO L225 Difference]: With dead ends: 1906 [2025-01-09 03:19:13,861 INFO L226 Difference]: Without dead ends: 1884 [2025-01-09 03:19:13,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2025-01-09 03:19:13,862 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 300 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:13,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 342 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:19:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2025-01-09 03:19:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1790. [2025-01-09 03:19:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1181 states have (on average 1.2921253175275191) internal successors, (1526), 1241 states have internal predecessors, (1526), 511 states have call successors, (511), 97 states have call predecessors, (511), 97 states have return successors, (502), 451 states have call predecessors, (502), 502 states have call successors, (502) [2025-01-09 03:19:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2539 transitions. [2025-01-09 03:19:14,157 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2539 transitions. Word has length 60 [2025-01-09 03:19:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:14,157 INFO L471 AbstractCegarLoop]: Abstraction has 1790 states and 2539 transitions. [2025-01-09 03:19:14,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-01-09 03:19:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2539 transitions. [2025-01-09 03:19:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-01-09 03:19:14,157 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:14,157 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:14,163 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 [2025-01-09 03:19:14,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 03:19:14,361 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:14,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:14,361 INFO L85 PathProgramCache]: Analyzing trace with hash 259328120, now seen corresponding path program 1 times [2025-01-09 03:19:14,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:14,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179572818] [2025-01-09 03:19:14,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:14,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:14,364 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-01-09 03:19:14,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-01-09 03:19:14,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:14,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-01-09 03:19:14,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:14,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179572818] [2025-01-09 03:19:14,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179572818] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:19:14,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:19:14,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:19:14,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809768308] [2025-01-09 03:19:14,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:14,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:19:14,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:14,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:19:14,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:19:14,427 INFO L87 Difference]: Start difference. First operand 1790 states and 2539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-01-09 03:19:14,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:14,768 INFO L93 Difference]: Finished difference Result 3149 states and 4464 transitions. [2025-01-09 03:19:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:19:14,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2025-01-09 03:19:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:14,777 INFO L225 Difference]: With dead ends: 3149 [2025-01-09 03:19:14,777 INFO L226 Difference]: Without dead ends: 1884 [2025-01-09 03:19:14,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:19:14,782 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:14,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 131 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2025-01-09 03:19:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1811. [2025-01-09 03:19:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1242 states have (on average 1.2954911433172303) internal successors, (1609), 1271 states have internal predecessors, (1609), 471 states have call successors, (471), 97 states have call predecessors, (471), 97 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2025-01-09 03:19:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2542 transitions. [2025-01-09 03:19:15,030 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2542 transitions. Word has length 62 [2025-01-09 03:19:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:15,030 INFO L471 AbstractCegarLoop]: Abstraction has 1811 states and 2542 transitions. [2025-01-09 03:19:15,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-01-09 03:19:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2542 transitions. [2025-01-09 03:19:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-01-09 03:19:15,031 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:15,031 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:15,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-01-09 03:19:15,031 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:15,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 71362364, now seen corresponding path program 1 times [2025-01-09 03:19:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827016075] [2025-01-09 03:19:15,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:15,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:15,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-01-09 03:19:15,041 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-01-09 03:19:15,042 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:15,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:15,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799530456] [2025-01-09 03:19:15,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:15,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:15,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:15,045 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) [2025-01-09 03:19:15,053 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 [2025-01-09 03:19:15,074 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-01-09 03:19:15,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-01-09 03:19:15,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:15,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:15,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 03:19:15,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-01-09 03:19:15,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-01-09 03:19:15,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:15,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827016075] [2025-01-09 03:19:15,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:15,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799530456] [2025-01-09 03:19:15,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799530456] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:15,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:19:15,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-01-09 03:19:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310983125] [2025-01-09 03:19:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:19:15,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:19:15,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:15,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:19:15,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:19:15,195 INFO L87 Difference]: Start difference. First operand 1811 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 03:19:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:15,480 INFO L93 Difference]: Finished difference Result 1849 states and 2579 transitions. [2025-01-09 03:19:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:19:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2025-01-09 03:19:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:15,492 INFO L225 Difference]: With dead ends: 1849 [2025-01-09 03:19:15,492 INFO L226 Difference]: Without dead ends: 1847 [2025-01-09 03:19:15,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:19:15,493 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:15,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 129 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:19:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2025-01-09 03:19:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1847. [2025-01-09 03:19:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1269 states have (on average 1.2876280535855005) internal successors, (1634), 1298 states have internal predecessors, (1634), 471 states have call successors, (471), 106 states have call predecessors, (471), 106 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2025-01-09 03:19:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2567 transitions. [2025-01-09 03:19:15,741 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2567 transitions. Word has length 63 [2025-01-09 03:19:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:15,742 INFO L471 AbstractCegarLoop]: Abstraction has 1847 states and 2567 transitions. [2025-01-09 03:19:15,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 03:19:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2567 transitions. [2025-01-09 03:19:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-01-09 03:19:15,743 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:15,743 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:15,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-01-09 03:19:15,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:15,944 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:15,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash -82823155, now seen corresponding path program 1 times [2025-01-09 03:19:15,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:15,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879108590] [2025-01-09 03:19:15,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:15,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:15,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-01-09 03:19:15,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-01-09 03:19:15,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:15,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:15,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407074679] [2025-01-09 03:19:15,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:15,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:15,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:15,966 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) [2025-01-09 03:19:15,967 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 [2025-01-09 03:19:15,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-01-09 03:19:16,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-01-09 03:19:16,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:16,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:16,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-01-09 03:19:16,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-01-09 03:19:16,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-01-09 03:19:16,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879108590] [2025-01-09 03:19:16,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407074679] [2025-01-09 03:19:16,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407074679] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:16,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:19:16,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-01-09 03:19:16,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264643085] [2025-01-09 03:19:16,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:16,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 03:19:16,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:16,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 03:19:16,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-01-09 03:19:16,983 INFO L87 Difference]: Start difference. First operand 1847 states and 2567 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2025-01-09 03:19:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:20,782 INFO L93 Difference]: Finished difference Result 2449 states and 3458 transitions. [2025-01-09 03:19:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-01-09 03:19:20,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2025-01-09 03:19:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:20,792 INFO L225 Difference]: With dead ends: 2449 [2025-01-09 03:19:20,792 INFO L226 Difference]: Without dead ends: 2447 [2025-01-09 03:19:20,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2025-01-09 03:19:20,794 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 235 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:20,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 677 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-01-09 03:19:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2025-01-09 03:19:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2317. [2025-01-09 03:19:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1611 states have (on average 1.309124767225326) internal successors, (2109), 1648 states have internal predecessors, (2109), 591 states have call successors, (591), 114 states have call predecessors, (591), 114 states have return successors, (582), 554 states have call predecessors, (582), 582 states have call successors, (582) [2025-01-09 03:19:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3282 transitions. [2025-01-09 03:19:21,205 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3282 transitions. Word has length 64 [2025-01-09 03:19:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:21,205 INFO L471 AbstractCegarLoop]: Abstraction has 2317 states and 3282 transitions. [2025-01-09 03:19:21,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2025-01-09 03:19:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3282 transitions. [2025-01-09 03:19:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-01-09 03:19:21,206 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:21,206 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2025-01-09 03:19:21,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 03:19:21,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:21,410 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:21,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash -394700136, now seen corresponding path program 2 times [2025-01-09 03:19:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:21,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339206000] [2025-01-09 03:19:21,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:19:21,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:21,414 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 66 statements into 2 equivalence classes. [2025-01-09 03:19:21,424 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-01-09 03:19:21,427 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:19:21,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:21,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903820776] [2025-01-09 03:19:21,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:19:21,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:21,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:21,433 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) [2025-01-09 03:19:21,437 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 [2025-01-09 03:19:21,460 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 66 statements into 2 equivalence classes. [2025-01-09 03:19:21,476 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-01-09 03:19:21,476 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:19:21,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:21,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-01-09 03:19:21,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 03:19:21,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:21,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:21,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339206000] [2025-01-09 03:19:21,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:21,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903820776] [2025-01-09 03:19:21,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903820776] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:21,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:19:21,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-01-09 03:19:21,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663217053] [2025-01-09 03:19:21,958 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:21,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 03:19:21,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:21,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 03:19:21,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:19:21,959 INFO L87 Difference]: Start difference. First operand 2317 states and 3282 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2025-01-09 03:19:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:22,802 INFO L93 Difference]: Finished difference Result 2432 states and 3440 transitions. [2025-01-09 03:19:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 03:19:22,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2025-01-09 03:19:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:22,832 INFO L225 Difference]: With dead ends: 2432 [2025-01-09 03:19:22,832 INFO L226 Difference]: Without dead ends: 2430 [2025-01-09 03:19:22,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2025-01-09 03:19:22,838 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 89 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:22,839 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 718 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:19:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2025-01-09 03:19:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 2326. [2025-01-09 03:19:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1622 states have (on average 1.3064118372379778) internal successors, (2119), 1660 states have internal predecessors, (2119), 585 states have call successors, (585), 118 states have call predecessors, (585), 118 states have return successors, (576), 547 states have call predecessors, (576), 576 states have call successors, (576) [2025-01-09 03:19:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3280 transitions. [2025-01-09 03:19:23,365 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3280 transitions. Word has length 66 [2025-01-09 03:19:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:23,365 INFO L471 AbstractCegarLoop]: Abstraction has 2326 states and 3280 transitions. [2025-01-09 03:19:23,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2025-01-09 03:19:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3280 transitions. [2025-01-09 03:19:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-01-09 03:19:23,366 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:23,366 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:23,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-01-09 03:19:23,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:23,567 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:23,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash 123182667, now seen corresponding path program 1 times [2025-01-09 03:19:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:23,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146014700] [2025-01-09 03:19:23,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:23,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:23,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-01-09 03:19:23,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-01-09 03:19:23,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:23,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:23,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917469116] [2025-01-09 03:19:23,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:23,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:23,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:23,587 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) [2025-01-09 03:19:23,593 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 [2025-01-09 03:19:23,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-01-09 03:19:23,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-01-09 03:19:23,639 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:23,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:23,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-01-09 03:19:23,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2025-01-09 03:19:24,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-01-09 03:19:24,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146014700] [2025-01-09 03:19:24,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917469116] [2025-01-09 03:19:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917469116] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:24,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:19:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2025-01-09 03:19:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113084596] [2025-01-09 03:19:24,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:24,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 03:19:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:24,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 03:19:24,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2025-01-09 03:19:24,617 INFO L87 Difference]: Start difference. First operand 2326 states and 3280 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2025-01-09 03:19:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:28,124 INFO L93 Difference]: Finished difference Result 2638 states and 3685 transitions. [2025-01-09 03:19:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-01-09 03:19:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 77 [2025-01-09 03:19:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:28,135 INFO L225 Difference]: With dead ends: 2638 [2025-01-09 03:19:28,136 INFO L226 Difference]: Without dead ends: 2631 [2025-01-09 03:19:28,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2025-01-09 03:19:28,137 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 272 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:28,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 991 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-01-09 03:19:28,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2025-01-09 03:19:28,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2546. [2025-01-09 03:19:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1755 states have (on average 1.2991452991452992) internal successors, (2280), 1794 states have internal predecessors, (2280), 650 states have call successors, (650), 140 states have call predecessors, (650), 140 states have return successors, (644), 611 states have call predecessors, (644), 644 states have call successors, (644) [2025-01-09 03:19:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3574 transitions. [2025-01-09 03:19:28,716 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3574 transitions. Word has length 77 [2025-01-09 03:19:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:28,716 INFO L471 AbstractCegarLoop]: Abstraction has 2546 states and 3574 transitions. [2025-01-09 03:19:28,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2025-01-09 03:19:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3574 transitions. [2025-01-09 03:19:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-01-09 03:19:28,718 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:28,719 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:28,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-01-09 03:19:28,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:28,923 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:28,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:28,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2129784449, now seen corresponding path program 1 times [2025-01-09 03:19:28,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:28,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681220188] [2025-01-09 03:19:28,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:28,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:28,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-01-09 03:19:28,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-01-09 03:19:28,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:28,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:28,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044001852] [2025-01-09 03:19:28,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:19:28,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:28,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:28,946 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) [2025-01-09 03:19:28,947 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 [2025-01-09 03:19:28,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-01-09 03:19:29,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-01-09 03:19:29,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:19:29,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:29,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-01-09 03:19:29,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2025-01-09 03:19:29,531 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:29,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:29,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681220188] [2025-01-09 03:19:29,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:29,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044001852] [2025-01-09 03:19:29,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044001852] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:29,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:19:29,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-01-09 03:19:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579419696] [2025-01-09 03:19:29,668 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:29,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 03:19:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:29,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 03:19:29,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2025-01-09 03:19:29,668 INFO L87 Difference]: Start difference. First operand 2546 states and 3574 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2025-01-09 03:19:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:30,607 INFO L93 Difference]: Finished difference Result 2780 states and 3916 transitions. [2025-01-09 03:19:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 03:19:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2025-01-09 03:19:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:30,619 INFO L225 Difference]: With dead ends: 2780 [2025-01-09 03:19:30,619 INFO L226 Difference]: Without dead ends: 2778 [2025-01-09 03:19:30,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2025-01-09 03:19:30,620 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 108 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:30,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 463 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:19:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2025-01-09 03:19:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2672. [2025-01-09 03:19:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 1848 states have (on average 1.3014069264069263) internal successors, (2405), 1889 states have internal predecessors, (2405), 678 states have call successors, (678), 145 states have call predecessors, (678), 145 states have return successors, (672), 637 states have call predecessors, (672), 672 states have call successors, (672) [2025-01-09 03:19:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3755 transitions. [2025-01-09 03:19:31,311 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3755 transitions. Word has length 89 [2025-01-09 03:19:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:31,311 INFO L471 AbstractCegarLoop]: Abstraction has 2672 states and 3755 transitions. [2025-01-09 03:19:31,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2025-01-09 03:19:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3755 transitions. [2025-01-09 03:19:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-01-09 03:19:31,317 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:31,318 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2025-01-09 03:19:31,324 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 [2025-01-09 03:19:31,522 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,SelfDestructingSolverStorable23 [2025-01-09 03:19:31,522 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:31,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1671305724, now seen corresponding path program 2 times [2025-01-09 03:19:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:31,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744460658] [2025-01-09 03:19:31,523 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:19:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:31,531 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 92 statements into 2 equivalence classes. [2025-01-09 03:19:31,552 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-01-09 03:19:31,553 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:19:31,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:31,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005140891] [2025-01-09 03:19:31,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:19:31,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:31,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:31,555 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) [2025-01-09 03:19:31,557 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 [2025-01-09 03:19:31,581 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 92 statements into 2 equivalence classes. [2025-01-09 03:19:31,601 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-01-09 03:19:31,601 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:19:31,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:31,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-01-09 03:19:31,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2025-01-09 03:19:31,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-01-09 03:19:32,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744460658] [2025-01-09 03:19:32,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005140891] [2025-01-09 03:19:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005140891] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:32,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:19:32,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-01-09 03:19:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629745621] [2025-01-09 03:19:32,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:32,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 03:19:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:32,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 03:19:32,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:19:32,037 INFO L87 Difference]: Start difference. First operand 2672 states and 3755 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-01-09 03:19:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:33,813 INFO L93 Difference]: Finished difference Result 4020 states and 5906 transitions. [2025-01-09 03:19:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 03:19:33,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 92 [2025-01-09 03:19:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:33,831 INFO L225 Difference]: With dead ends: 4020 [2025-01-09 03:19:33,831 INFO L226 Difference]: Without dead ends: 4016 [2025-01-09 03:19:33,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2025-01-09 03:19:33,833 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 177 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:33,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 492 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 03:19:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2025-01-09 03:19:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3728. [2025-01-09 03:19:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 2393 states have (on average 1.3531132469703302) internal successors, (3238), 2454 states have internal predecessors, (3238), 1170 states have call successors, (1170), 165 states have call predecessors, (1170), 164 states have return successors, (1164), 1108 states have call predecessors, (1164), 1164 states have call successors, (1164) [2025-01-09 03:19:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5572 transitions. [2025-01-09 03:19:35,133 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5572 transitions. Word has length 92 [2025-01-09 03:19:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:35,133 INFO L471 AbstractCegarLoop]: Abstraction has 3728 states and 5572 transitions. [2025-01-09 03:19:35,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-01-09 03:19:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5572 transitions. [2025-01-09 03:19:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-01-09 03:19:35,135 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:35,135 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:35,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-01-09 03:19:35,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:35,336 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:35,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash -382011247, now seen corresponding path program 3 times [2025-01-09 03:19:35,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:35,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103720041] [2025-01-09 03:19:35,336 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:19:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:35,340 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 94 statements into 7 equivalence classes. [2025-01-09 03:19:35,363 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 94 of 94 statements. [2025-01-09 03:19:35,363 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:19:35,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:35,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382667943] [2025-01-09 03:19:35,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:19:35,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:35,369 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) [2025-01-09 03:19:35,370 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 [2025-01-09 03:19:35,393 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 94 statements into 7 equivalence classes. [2025-01-09 03:19:35,413 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 69 of 94 statements. [2025-01-09 03:19:35,413 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 03:19:35,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:35,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-01-09 03:19:35,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-01-09 03:19:36,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-01-09 03:19:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:37,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103720041] [2025-01-09 03:19:37,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:37,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382667943] [2025-01-09 03:19:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382667943] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:19:37,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:19:37,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2025-01-09 03:19:37,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664274704] [2025-01-09 03:19:37,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:37,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-09 03:19:37,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:37,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-09 03:19:37,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2025-01-09 03:19:37,006 INFO L87 Difference]: Start difference. First operand 3728 states and 5572 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2025-01-09 03:19:44,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:19:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:58,637 INFO L93 Difference]: Finished difference Result 6085 states and 9401 transitions. [2025-01-09 03:19:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2025-01-09 03:19:58,638 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 94 [2025-01-09 03:19:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:58,677 INFO L225 Difference]: With dead ends: 6085 [2025-01-09 03:19:58,680 INFO L226 Difference]: Without dead ends: 6083 [2025-01-09 03:19:58,684 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4359 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2608, Invalid=10048, Unknown=0, NotChecked=0, Total=12656 [2025-01-09 03:19:58,684 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 523 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 361 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:58,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1438 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1283 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2025-01-09 03:19:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6083 states. [2025-01-09 03:20:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6083 to 4359. [2025-01-09 03:20:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 2872 states have (on average 1.3561977715877438) internal successors, (3895), 2937 states have internal predecessors, (3895), 1292 states have call successors, (1292), 195 states have call predecessors, (1292), 194 states have return successors, (1286), 1226 states have call predecessors, (1286), 1286 states have call successors, (1286) [2025-01-09 03:20:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6473 transitions. [2025-01-09 03:20:00,699 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6473 transitions. Word has length 94 [2025-01-09 03:20:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:00,700 INFO L471 AbstractCegarLoop]: Abstraction has 4359 states and 6473 transitions. [2025-01-09 03:20:00,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2025-01-09 03:20:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6473 transitions. [2025-01-09 03:20:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-01-09 03:20:00,701 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:00,701 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:00,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-09 03:20:00,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-01-09 03:20:00,905 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:00,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1131966787, now seen corresponding path program 3 times [2025-01-09 03:20:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908797065] [2025-01-09 03:20:00,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:20:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:00,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 7 equivalence classes. [2025-01-09 03:20:00,943 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 93 of 93 statements. [2025-01-09 03:20:00,947 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:20:00,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:20:00,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731927898] [2025-01-09 03:20:00,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:20:00,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:00,954 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) [2025-01-09 03:20:00,955 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 [2025-01-09 03:20:00,983 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 7 equivalence classes. [2025-01-09 03:20:01,006 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 68 of 93 statements. [2025-01-09 03:20:01,006 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 03:20:01,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:01,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-01-09 03:20:01,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-01-09 03:20:01,782 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-01-09 03:20:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908797065] [2025-01-09 03:20:02,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:20:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731927898] [2025-01-09 03:20:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731927898] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:02,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:20:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2025-01-09 03:20:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180952103] [2025-01-09 03:20:02,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:02,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 03:20:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:02,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 03:20:02,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-01-09 03:20:02,463 INFO L87 Difference]: Start difference. First operand 4359 states and 6473 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2025-01-09 03:20:11,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:20:16,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:20:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:24,191 INFO L93 Difference]: Finished difference Result 6422 states and 9875 transitions. [2025-01-09 03:20:24,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-01-09 03:20:24,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 93 [2025-01-09 03:20:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:24,208 INFO L225 Difference]: With dead ends: 6422 [2025-01-09 03:20:24,208 INFO L226 Difference]: Without dead ends: 6420 [2025-01-09 03:20:24,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1555, Invalid=5755, Unknown=0, NotChecked=0, Total=7310 [2025-01-09 03:20:24,211 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 490 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 309 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:24,212 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1117 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 830 Invalid, 2 Unknown, 0 Unchecked, 12.2s Time] [2025-01-09 03:20:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2025-01-09 03:20:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 5295. [2025-01-09 03:20:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5295 states, 3524 states have (on average 1.3742905788876276) internal successors, (4843), 3595 states have internal predecessors, (4843), 1566 states have call successors, (1566), 205 states have call predecessors, (1566), 204 states have return successors, (1560), 1494 states have call predecessors, (1560), 1560 states have call successors, (1560) [2025-01-09 03:20:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5295 states to 5295 states and 7969 transitions. [2025-01-09 03:20:26,524 INFO L78 Accepts]: Start accepts. Automaton has 5295 states and 7969 transitions. Word has length 93 [2025-01-09 03:20:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:26,524 INFO L471 AbstractCegarLoop]: Abstraction has 5295 states and 7969 transitions. [2025-01-09 03:20:26,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2025-01-09 03:20:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5295 states and 7969 transitions. [2025-01-09 03:20:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-01-09 03:20:26,527 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:26,527 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:26,533 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 [2025-01-09 03:20:26,731 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,SelfDestructingSolverStorable26 [2025-01-09 03:20:26,731 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:26,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1812886516, now seen corresponding path program 1 times [2025-01-09 03:20:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864449001] [2025-01-09 03:20:26,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:26,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 94 statements into 1 equivalence classes. [2025-01-09 03:20:26,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 94 of 94 statements. [2025-01-09 03:20:26,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:26,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-01-09 03:20:26,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:26,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864449001] [2025-01-09 03:20:26,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864449001] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:26,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295256134] [2025-01-09 03:20:26,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:26,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:26,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:26,930 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) [2025-01-09 03:20:26,932 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 [2025-01-09 03:20:26,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 94 statements into 1 equivalence classes. [2025-01-09 03:20:26,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 94 of 94 statements. [2025-01-09 03:20:26,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:26,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:26,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 03:20:26,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-01-09 03:20:27,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-01-09 03:20:27,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295256134] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:27,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:27,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2025-01-09 03:20:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619281730] [2025-01-09 03:20:27,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:27,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 03:20:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:27,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 03:20:27,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2025-01-09 03:20:27,319 INFO L87 Difference]: Start difference. First operand 5295 states and 7969 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2025-01-09 03:20:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:34,659 INFO L93 Difference]: Finished difference Result 14472 states and 23201 transitions. [2025-01-09 03:20:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-01-09 03:20:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 94 [2025-01-09 03:20:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:34,691 INFO L225 Difference]: With dead ends: 14472 [2025-01-09 03:20:34,692 INFO L226 Difference]: Without dead ends: 12237 [2025-01-09 03:20:34,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2025-01-09 03:20:34,698 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 458 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:34,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 447 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 03:20:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12237 states.