./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 17:30:08,512 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 17:30:08,573 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 17:30:08,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 17:30:08,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 17:30:08,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 17:30:08,605 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 17:30:08,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 17:30:08,605 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 17:30:08,605 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 17:30:08,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 17:30:08,606 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 17:30:08,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 17:30:08,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 17:30:08,607 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 17:30:08,607 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 17:30:08,607 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 17:30:08,607 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 17:30:08,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 17:30:08,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 17:30:08,607 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 17:30:08,608 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 17:30:08,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 17:30:08,609 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 17:30:08,609 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 17:30:08,609 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 17:30:08,609 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 17:30:08,609 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 17:30:08,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 17:30:08,609 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 17:30:08,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 17:30:08,610 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 17:30:08,610 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 17:30:08,610 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 -> 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a [2025-02-05 17:30:08,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 17:30:08,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 17:30:08,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 17:30:08,861 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 17:30:08,861 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 17:30:08,862 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2025-02-05 17:30:10,002 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fa4b1f78e/57d3fc39951144d7a331d05a2e4245e1/FLAG81b4ba75e [2025-02-05 17:30:10,221 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 17:30:10,222 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2025-02-05 17:30:10,228 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fa4b1f78e/57d3fc39951144d7a331d05a2e4245e1/FLAG81b4ba75e [2025-02-05 17:30:10,241 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fa4b1f78e/57d3fc39951144d7a331d05a2e4245e1 [2025-02-05 17:30:10,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 17:30:10,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 17:30:10,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 17:30:10,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 17:30:10,250 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 17:30:10,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334ff3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10, skipping insertion in model container [2025-02-05 17:30:10,252 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,267 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 17:30:10,359 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/combinations/gcd_4+newton_2_6.i[1224,1237] [2025-02-05 17:30:10,376 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/combinations/gcd_4+newton_2_6.i[2827,2840] [2025-02-05 17:30:10,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 17:30:10,384 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 17:30:10,392 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/combinations/gcd_4+newton_2_6.i[1224,1237] [2025-02-05 17:30:10,398 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/combinations/gcd_4+newton_2_6.i[2827,2840] [2025-02-05 17:30:10,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 17:30:10,412 INFO L204 MainTranslator]: Completed translation [2025-02-05 17:30:10,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10 WrapperNode [2025-02-05 17:30:10,413 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 17:30:10,413 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 17:30:10,413 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 17:30:10,413 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 17:30:10,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,443 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 76 [2025-02-05 17:30:10,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 17:30:10,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 17:30:10,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 17:30:10,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 17:30:10,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,454 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,470 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2025-02-05 17:30:10,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,471 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,474 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 17:30:10,478 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 17:30:10,478 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 17:30:10,478 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 17:30:10,479 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (1/1) ... [2025-02-05 17:30:10,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 17:30:10,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:10,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 17:30:10,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 17:30:10,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 17:30:10,536 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2025-02-05 17:30:10,536 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2025-02-05 17:30:10,536 INFO L130 BoogieDeclarations]: Found specification of procedure f [2025-02-05 17:30:10,537 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2025-02-05 17:30:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 17:30:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 17:30:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 17:30:10,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 17:30:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 17:30:10,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 17:30:10,582 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 17:30:10,584 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 17:30:10,731 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2025-02-05 17:30:10,731 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 17:30:10,737 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 17:30:10,737 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 17:30:10,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 05:30:10 BoogieIcfgContainer [2025-02-05 17:30:10,738 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 17:30:10,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 17:30:10,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 17:30:10,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 17:30:10,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 05:30:10" (1/3) ... [2025-02-05 17:30:10,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5fcb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 05:30:10, skipping insertion in model container [2025-02-05 17:30:10,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:10" (2/3) ... [2025-02-05 17:30:10,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5fcb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 05:30:10, skipping insertion in model container [2025-02-05 17:30:10,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 05:30:10" (3/3) ... [2025-02-05 17:30:10,746 INFO L128 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_6.i [2025-02-05 17:30:10,757 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 17:30:10,758 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG gcd_4+newton_2_6.i that has 4 procedures, 42 locations, 1 initial locations, 1 loop locations, and 2 error locations. [2025-02-05 17:30:10,798 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 17:30:10,805 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;@107cccc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 17:30:10,806 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-02-05 17:30:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 17:30:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 17:30:10,812 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:10,813 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:10,813 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:10,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1151646490, now seen corresponding path program 1 times [2025-02-05 17:30:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:30:10,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258655561] [2025-02-05 17:30:10,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:30:10,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 17:30:10,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 17:30:10,890 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:10,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:10,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:30:10,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258655561] [2025-02-05 17:30:10,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258655561] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 17:30:10,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 17:30:10,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 17:30:10,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920919637] [2025-02-05 17:30:10,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 17:30:10,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 17:30:10,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:30:10,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 17:30:10,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:10,992 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:11,035 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2025-02-05 17:30:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 17:30:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-05 17:30:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:11,042 INFO L225 Difference]: With dead ends: 80 [2025-02-05 17:30:11,042 INFO L226 Difference]: Without dead ends: 37 [2025-02-05 17:30:11,045 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:11,047 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:11,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 17:30:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-05 17:30:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2025-02-05 17:30:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2025-02-05 17:30:11,076 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 11 [2025-02-05 17:30:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:11,076 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2025-02-05 17:30:11,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2025-02-05 17:30:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 17:30:11,077 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:11,077 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:11,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 17:30:11,078 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:11,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash -264142809, now seen corresponding path program 1 times [2025-02-05 17:30:11,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:30:11,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230548376] [2025-02-05 17:30:11,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:30:11,086 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 17:30:11,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 17:30:11,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:11,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:11,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:30:11,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230548376] [2025-02-05 17:30:11,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230548376] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 17:30:11,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 17:30:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 17:30:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066216602] [2025-02-05 17:30:11,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 17:30:11,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 17:30:11,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:30:11,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 17:30:11,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:11,142 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:11,163 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2025-02-05 17:30:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 17:30:11,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-05 17:30:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:11,165 INFO L225 Difference]: With dead ends: 57 [2025-02-05 17:30:11,165 INFO L226 Difference]: Without dead ends: 41 [2025-02-05 17:30:11,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:11,165 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:11,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 67 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 17:30:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-05 17:30:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2025-02-05 17:30:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2025-02-05 17:30:11,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 11 [2025-02-05 17:30:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:11,174 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2025-02-05 17:30:11,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2025-02-05 17:30:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 17:30:11,175 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:11,175 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:11,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 17:30:11,175 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:11,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:11,175 INFO L85 PathProgramCache]: Analyzing trace with hash 373208147, now seen corresponding path program 1 times [2025-02-05 17:30:11,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:30:11,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912983050] [2025-02-05 17:30:11,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:11,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:30:11,180 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-05 17:30:11,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 17:30:11,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:11,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:11,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:30:11,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912983050] [2025-02-05 17:30:11,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912983050] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 17:30:11,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 17:30:11,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 17:30:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587775451] [2025-02-05 17:30:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 17:30:11,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 17:30:11,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:30:11,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 17:30:11,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:11,266 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:11,285 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2025-02-05 17:30:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 17:30:11,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-05 17:30:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:11,286 INFO L225 Difference]: With dead ends: 51 [2025-02-05 17:30:11,286 INFO L226 Difference]: Without dead ends: 39 [2025-02-05 17:30:11,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:11,287 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 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 [2025-02-05 17:30:11,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 17:30:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-05 17:30:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-02-05 17:30:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2025-02-05 17:30:11,298 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 14 [2025-02-05 17:30:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:11,298 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2025-02-05 17:30:11,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2025-02-05 17:30:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-05 17:30:11,299 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:11,299 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:11,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 17:30:11,299 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:11,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1424638767, now seen corresponding path program 1 times [2025-02-05 17:30:11,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:30:11,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538678408] [2025-02-05 17:30:11,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:11,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:30:11,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-05 17:30:11,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 17:30:11,311 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:11,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:11,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:30:11,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538678408] [2025-02-05 17:30:11,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538678408] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 17:30:11,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309515186] [2025-02-05 17:30:11,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:11,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:11,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 17:30:11,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 17:30:11,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-05 17:30:11,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 17:30:11,471 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:11,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:11,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 17:30:11,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:30:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:11,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 17:30:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:11,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309515186] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 17:30:11,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 17:30:11,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2025-02-05 17:30:11,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308407508] [2025-02-05 17:30:11,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 17:30:11,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 17:30:11,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:30:11,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 17:30:11,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-05 17:30:11,593 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:11,624 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2025-02-05 17:30:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 17:30:11,625 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-02-05 17:30:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:11,625 INFO L225 Difference]: With dead ends: 55 [2025-02-05 17:30:11,625 INFO L226 Difference]: Without dead ends: 43 [2025-02-05 17:30:11,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-05 17:30:11,628 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:11,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 159 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 17:30:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-02-05 17:30:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-02-05 17:30:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2025-02-05 17:30:11,636 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 16 [2025-02-05 17:30:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:11,637 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2025-02-05 17:30:11,637 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2025-02-05 17:30:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 17:30:11,637 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:11,637 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:11,644 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 [2025-02-05 17:30:11,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:11,838 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:11,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash 793720653, now seen corresponding path program 2 times [2025-02-05 17:30:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:30:11,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483568647] [2025-02-05 17:30:11,839 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 17:30:11,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:30:11,844 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-05 17:30:11,862 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 17:30:11,862 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 17:30:11,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:30:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483568647] [2025-02-05 17:30:11,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483568647] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 17:30:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045734441] [2025-02-05 17:30:11,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 17:30:11,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:11,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:11,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 17:30:11,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 17:30:12,001 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-05 17:30:12,013 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 17:30:12,013 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 17:30:12,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:12,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 17:30:12,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:30:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:12,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 17:30:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045734441] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 17:30:12,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 17:30:12,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-05 17:30:12,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330495040] [2025-02-05 17:30:12,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 17:30:12,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 17:30:12,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:30:12,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 17:30:12,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2025-02-05 17:30:12,173 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:12,275 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2025-02-05 17:30:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 17:30:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-02-05 17:30:12,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:12,276 INFO L225 Difference]: With dead ends: 64 [2025-02-05 17:30:12,276 INFO L226 Difference]: Without dead ends: 50 [2025-02-05 17:30:12,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2025-02-05 17:30:12,277 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:12,277 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 282 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 17:30:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-02-05 17:30:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2025-02-05 17:30:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2025-02-05 17:30:12,284 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 20 [2025-02-05 17:30:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:12,284 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2025-02-05 17:30:12,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2025-02-05 17:30:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 17:30:12,284 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:12,284 INFO L218 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:12,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 17:30:12,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:12,489 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:12,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1448466508, now seen corresponding path program 3 times [2025-02-05 17:30:12,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:30:12,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507246968] [2025-02-05 17:30:12,490 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 17:30:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:30:12,494 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 6 equivalence classes. [2025-02-05 17:30:12,507 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 17:30:12,507 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 17:30:12,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 17:30:12,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57836780] [2025-02-05 17:30:12,508 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 17:30:12,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:12,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 17:30:12,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 17:30:12,537 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 6 equivalence classes. [2025-02-05 17:30:12,563 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 18 of 22 statements. [2025-02-05 17:30:12,563 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 17:30:12,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:12,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 17:30:12,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:30:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 17:30:12,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 17:30:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 17:30:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 17:30:12,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507246968] [2025-02-05 17:30:12,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 17:30:12,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57836780] [2025-02-05 17:30:12,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57836780] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 17:30:12,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 17:30:12,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2025-02-05 17:30:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096132095] [2025-02-05 17:30:12,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 17:30:12,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 17:30:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 17:30:12,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 17:30:12,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2025-02-05 17:30:12,935 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:13,263 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2025-02-05 17:30:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 17:30:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-02-05 17:30:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:13,266 INFO L225 Difference]: With dead ends: 69 [2025-02-05 17:30:13,266 INFO L226 Difference]: Without dead ends: 66 [2025-02-05 17:30:13,266 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-02-05 17:30:13,266 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:13,267 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 381 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 17:30:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-02-05 17:30:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2025-02-05 17:30:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 51 states have internal predecessors, (57), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 17:30:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2025-02-05 17:30:13,279 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 22 [2025-02-05 17:30:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:13,281 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2025-02-05 17:30:13,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2025-02-05 17:30:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 17:30:13,282 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:13,282 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] [2025-02-05 17:30:13,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 17:30:13,486 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 [2025-02-05 17:30:13,486 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:13,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1155762721, now seen corresponding path program 1 times [2025-02-05 17:30:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 17:30:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307079712] [2025-02-05 17:30:13,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 17:30:13,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 17:30:13,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 17:30:13,494 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:13,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-05 17:30:13,494 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-05 17:30:13,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 17:30:13,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 17:30:13,499 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:13,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-05 17:30:13,510 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-05 17:30:13,511 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-05 17:30:13,512 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2025-02-05 17:30:13,513 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2025-02-05 17:30:13,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-05 17:30:13,516 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2025-02-05 17:30:13,531 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-05 17:30:13,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 05:30:13 BoogieIcfgContainer [2025-02-05 17:30:13,534 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-05 17:30:13,535 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-05 17:30:13,535 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-05 17:30:13,535 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-05 17:30:13,536 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 05:30:10" (3/4) ... [2025-02-05 17:30:13,538 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-05 17:30:13,538 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-05 17:30:13,539 INFO L158 Benchmark]: Toolchain (without parser) took 3293.37ms. Allocated memory is still 167.8MB. Free memory was 129.4MB in the beginning and 60.0MB in the end (delta: 69.5MB). Peak memory consumption was 64.3MB. Max. memory is 16.1GB. [2025-02-05 17:30:13,541 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 192.9MB. Free memory is still 117.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 17:30:13,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.79ms. Allocated memory is still 167.8MB. Free memory was 129.1MB in the beginning and 117.1MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 17:30:13,542 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.00ms. Allocated memory is still 167.8MB. Free memory was 117.1MB in the beginning and 116.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 17:30:13,542 INFO L158 Benchmark]: Boogie Preprocessor took 31.67ms. Allocated memory is still 167.8MB. Free memory was 116.0MB in the beginning and 114.3MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 17:30:13,542 INFO L158 Benchmark]: IcfgBuilder took 259.98ms. Allocated memory is still 167.8MB. Free memory was 114.3MB in the beginning and 100.0MB in the end (delta: 14.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 17:30:13,542 INFO L158 Benchmark]: TraceAbstraction took 2795.06ms. Allocated memory is still 167.8MB. Free memory was 99.3MB in the beginning and 60.0MB in the end (delta: 39.3MB). Peak memory consumption was 39.1MB. Max. memory is 16.1GB. [2025-02-05 17:30:13,542 INFO L158 Benchmark]: Witness Printer took 3.54ms. Allocated memory is still 167.8MB. Free memory was 60.0MB in the beginning and 60.0MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 17:30:13,543 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 192.9MB. Free memory is still 117.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 165.79ms. Allocated memory is still 167.8MB. Free memory was 129.1MB in the beginning and 117.1MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.00ms. Allocated memory is still 167.8MB. Free memory was 117.1MB in the beginning and 116.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.67ms. Allocated memory is still 167.8MB. Free memory was 116.0MB in the beginning and 114.3MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 259.98ms. Allocated memory is still 167.8MB. Free memory was 114.3MB in the beginning and 100.0MB in the end (delta: 14.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2795.06ms. Allocated memory is still 167.8MB. Free memory was 99.3MB in the beginning and 60.0MB in the end (delta: 39.3MB). Peak memory consumption was 39.1MB. Max. memory is 16.1GB. * Witness Printer took 3.54ms. Allocated memory is still 167.8MB. Free memory was 60.0MB in the beginning and 60.0MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 100, overapproximation of someBinaryArithmeticFLOAToperation at line 102, overapproximation of someBinaryArithmeticFLOAToperation at line 87, overapproximation of someBinaryArithmeticFLOAToperation at line 92. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L82] COND FALSE !(!cond) [L98] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=111] [L100] RET, EXPR f(IN) VAL [IN=111] [L100] CALL, EXPR fp(IN) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=111] [L100] RET, EXPR fp(IN) VAL [IN=111] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=110] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=110] [L102] RET, EXPR f(x) VAL [IN=111, x=110] [L102] CALL, EXPR fp(x) VAL [\old(x)=110] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=110] [L102] RET, EXPR fp(x) VAL [IN=111, x=110] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=111] [L109] reach_error() VAL [IN=111] - UnprovableResult [Line: 27]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 1039 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 824 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 412 IncrementalHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 215 mSDtfsCounter, 412 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=6, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 177 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 896 SizeOfPredicates, 9 NumberOfNonLiveVariables, 252 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 45/111 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-02-05 17:30:13,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/combinations/gcd_4+newton_2_6.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 17:30:15,395 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 17:30:15,491 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2025-02-05 17:30:15,495 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 17:30:15,496 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 17:30:15,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 17:30:15,510 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 17:30:15,510 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 17:30:15,511 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 17:30:15,511 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 17:30:15,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 17:30:15,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 17:30:15,511 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 17:30:15,511 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 17:30:15,511 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 17:30:15,512 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-02-05 17:30:15,512 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 17:30:15,513 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 17:30:15,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 17:30:15,513 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 17:30:15,514 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 17:30:15,514 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-02-05 17:30:15,514 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-02-05 17:30:15,514 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 17:30:15,514 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 17:30:15,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 17:30:15,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 17:30:15,514 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 -> 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a [2025-02-05 17:30:15,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 17:30:15,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 17:30:15,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 17:30:15,773 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 17:30:15,773 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 17:30:15,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2025-02-05 17:30:16,965 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9acf13347/818c72d67da146f4bf498449e844a5e6/FLAGd6affe00a [2025-02-05 17:30:17,150 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 17:30:17,150 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2025-02-05 17:30:17,157 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9acf13347/818c72d67da146f4bf498449e844a5e6/FLAGd6affe00a [2025-02-05 17:30:17,524 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9acf13347/818c72d67da146f4bf498449e844a5e6 [2025-02-05 17:30:17,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 17:30:17,526 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 17:30:17,527 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 17:30:17,527 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 17:30:17,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 17:30:17,530 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,531 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dfc3084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17, skipping insertion in model container [2025-02-05 17:30:17,531 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,545 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 17:30:17,632 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/combinations/gcd_4+newton_2_6.i[1224,1237] [2025-02-05 17:30:17,657 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/combinations/gcd_4+newton_2_6.i[2827,2840] [2025-02-05 17:30:17,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 17:30:17,667 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 17:30:17,675 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/combinations/gcd_4+newton_2_6.i[1224,1237] [2025-02-05 17:30:17,681 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/combinations/gcd_4+newton_2_6.i[2827,2840] [2025-02-05 17:30:17,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 17:30:17,696 INFO L204 MainTranslator]: Completed translation [2025-02-05 17:30:17,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17 WrapperNode [2025-02-05 17:30:17,697 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 17:30:17,697 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 17:30:17,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 17:30:17,697 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 17:30:17,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,716 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,731 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 73 [2025-02-05 17:30:17,731 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 17:30:17,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 17:30:17,732 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 17:30:17,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 17:30:17,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,747 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,764 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2025-02-05 17:30:17,765 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,765 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,774 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,776 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 17:30:17,779 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 17:30:17,779 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 17:30:17,779 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 17:30:17,780 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (1/1) ... [2025-02-05 17:30:17,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 17:30:17,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:17,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 17:30:17,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 17:30:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 17:30:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-05 17:30:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-02-05 17:30:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2025-02-05 17:30:17,859 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2025-02-05 17:30:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure f [2025-02-05 17:30:17,859 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2025-02-05 17:30:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 17:30:17,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 17:30:17,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 17:30:17,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 17:30:17,913 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 17:30:17,914 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 17:30:30,116 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2025-02-05 17:30:30,117 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 17:30:30,123 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 17:30:30,124 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 17:30:30,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 05:30:30 BoogieIcfgContainer [2025-02-05 17:30:30,124 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 17:30:30,126 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 17:30:30,127 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 17:30:30,130 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 17:30:30,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 05:30:17" (1/3) ... [2025-02-05 17:30:30,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70fb1d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 05:30:30, skipping insertion in model container [2025-02-05 17:30:30,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 05:30:17" (2/3) ... [2025-02-05 17:30:30,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70fb1d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 05:30:30, skipping insertion in model container [2025-02-05 17:30:30,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 05:30:30" (3/3) ... [2025-02-05 17:30:30,132 INFO L128 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_6.i [2025-02-05 17:30:30,144 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 17:30:30,146 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG gcd_4+newton_2_6.i that has 4 procedures, 42 locations, 1 initial locations, 1 loop locations, and 2 error locations. [2025-02-05 17:30:30,187 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 17:30:30,196 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;@4eefcc0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 17:30:30,197 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-02-05 17:30:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 17:30:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 17:30:30,205 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:30,205 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:30,205 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:30,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1151646490, now seen corresponding path program 1 times [2025-02-05 17:30:30,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-05 17:30:30,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365363944] [2025-02-05 17:30:30,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:30,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:30,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:30,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 17:30:30,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 17:30:30,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 17:30:30,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 17:30:30,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:30,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:30,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 17:30:30,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:30:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:30,415 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 17:30:30,415 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-05 17:30:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365363944] [2025-02-05 17:30:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365363944] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 17:30:30,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 17:30:30,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 17:30:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472979476] [2025-02-05 17:30:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 17:30:30,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 17:30:30,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-05 17:30:30,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 17:30:30,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:30,437 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:30,560 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2025-02-05 17:30:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 17:30:30,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-05 17:30:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:30,567 INFO L225 Difference]: With dead ends: 81 [2025-02-05 17:30:30,567 INFO L226 Difference]: Without dead ends: 37 [2025-02-05 17:30:30,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:30,571 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:30,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 84 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 17:30:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-05 17:30:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2025-02-05 17:30:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2025-02-05 17:30:30,595 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 11 [2025-02-05 17:30:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:30,596 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2025-02-05 17:30:30,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2025-02-05 17:30:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 17:30:30,597 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:30,597 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:30,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 17:30:30,799 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 [2025-02-05 17:30:30,800 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:30,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2048670773, now seen corresponding path program 1 times [2025-02-05 17:30:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-05 17:30:30,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969086746] [2025-02-05 17:30:30,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:30,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:30,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:30,803 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 17:30:30,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 17:30:30,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 17:30:30,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 17:30:30,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:30,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:30,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 17:30:30,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:30:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:30,932 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 17:30:30,933 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-05 17:30:30,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969086746] [2025-02-05 17:30:30,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969086746] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 17:30:30,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 17:30:30,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 17:30:30,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127372762] [2025-02-05 17:30:30,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 17:30:30,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 17:30:30,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-05 17:30:30,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 17:30:30,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:30,936 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:31,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:31,041 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2025-02-05 17:30:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 17:30:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-02-05 17:30:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:31,043 INFO L225 Difference]: With dead ends: 50 [2025-02-05 17:30:31,044 INFO L226 Difference]: Without dead ends: 37 [2025-02-05 17:30:31,045 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 17:30:31,045 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:31,046 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 17:30:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-05 17:30:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2025-02-05 17:30:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2025-02-05 17:30:31,053 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 12 [2025-02-05 17:30:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:31,053 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2025-02-05 17:30:31,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2025-02-05 17:30:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 17:30:31,054 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:31,054 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:31,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 17:30:31,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:31,255 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:31,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 373208147, now seen corresponding path program 1 times [2025-02-05 17:30:31,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-05 17:30:31,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921409397] [2025-02-05 17:30:31,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:31,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:31,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:31,259 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 17:30:31,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 17:30:31,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-05 17:30:31,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 17:30:31,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:31,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:31,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 17:30:31,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:30:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:31,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 17:30:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:31,948 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-05 17:30:31,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921409397] [2025-02-05 17:30:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921409397] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 17:30:31,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 17:30:31,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-02-05 17:30:31,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839168979] [2025-02-05 17:30:31,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 17:30:31,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 17:30:31,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-05 17:30:31,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 17:30:31,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-05 17:30:31,950 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:32,301 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2025-02-05 17:30:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 17:30:32,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-05 17:30:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:32,302 INFO L225 Difference]: With dead ends: 54 [2025-02-05 17:30:32,302 INFO L226 Difference]: Without dead ends: 42 [2025-02-05 17:30:32,302 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-02-05 17:30:32,303 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:32,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 127 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 17:30:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-05 17:30:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-02-05 17:30:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2025-02-05 17:30:32,308 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 14 [2025-02-05 17:30:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:32,308 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2025-02-05 17:30:32,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2025-02-05 17:30:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-05 17:30:32,308 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:32,308 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:32,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 17:30:32,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:32,509 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:32,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1716297167, now seen corresponding path program 1 times [2025-02-05 17:30:32,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-05 17:30:32,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574451343] [2025-02-05 17:30:32,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:30:32,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:32,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 17:30:32,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 17:30:32,537 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-05 17:30:32,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 17:30:32,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 17:30:32,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:32,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 17:30:32,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:30:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:33,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 17:30:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 17:30:33,941 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-05 17:30:33,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574451343] [2025-02-05 17:30:33,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574451343] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 17:30:33,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 17:30:33,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2025-02-05 17:30:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916610155] [2025-02-05 17:30:33,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 17:30:33,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 17:30:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-05 17:30:33,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 17:30:33,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-05 17:30:33,942 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:30:35,018 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2025-02-05 17:30:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 17:30:35,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-02-05 17:30:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:30:35,021 INFO L225 Difference]: With dead ends: 62 [2025-02-05 17:30:35,021 INFO L226 Difference]: Without dead ends: 49 [2025-02-05 17:30:35,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2025-02-05 17:30:35,022 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 17:30:35,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 189 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 17:30:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-05 17:30:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2025-02-05 17:30:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 17:30:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2025-02-05 17:30:35,029 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2025-02-05 17:30:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:30:35,030 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2025-02-05 17:30:35,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:30:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2025-02-05 17:30:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 17:30:35,031 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:30:35,031 INFO L218 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 17:30:35,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 17:30:35,231 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 [2025-02-05 17:30:35,232 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:30:35,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:30:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1448466508, now seen corresponding path program 2 times [2025-02-05 17:30:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-05 17:30:35,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295509031] [2025-02-05 17:30:35,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 17:30:35,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:30:35,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 17:30:35,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 17:30:35,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 17:30:35,257 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-05 17:30:35,282 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 17:30:35,282 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 17:30:35,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 17:30:35,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 17:30:35,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 17:30:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 17:30:37,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 17:30:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 17:30:48,007 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-05 17:30:48,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295509031] [2025-02-05 17:30:48,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295509031] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 17:30:48,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 17:30:48,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2025-02-05 17:30:48,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988738594] [2025-02-05 17:30:48,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 17:30:48,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 17:30:48,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-05 17:30:48,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 17:30:48,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2025-02-05 17:30:48,013 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:31:01,062 WARN L286 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 17:31:05,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 17:31:09,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 17:31:23,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 17:31:28,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 17:31:32,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 17:31:34,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 17:31:45,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 17:31:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 17:31:47,501 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2025-02-05 17:31:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 17:31:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-02-05 17:31:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 17:31:47,509 INFO L225 Difference]: With dead ends: 70 [2025-02-05 17:31:47,509 INFO L226 Difference]: Without dead ends: 67 [2025-02-05 17:31:47,509 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=96, Invalid=503, Unknown=1, NotChecked=0, Total=600 [2025-02-05 17:31:47,510 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.8s IncrementalHoareTripleChecker+Time [2025-02-05 17:31:47,510 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 439 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 4 Unknown, 0 Unchecked, 27.8s Time] [2025-02-05 17:31:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-05 17:31:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2025-02-05 17:31:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 53 states have internal predecessors, (61), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 17:31:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2025-02-05 17:31:47,518 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 22 [2025-02-05 17:31:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 17:31:47,518 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2025-02-05 17:31:47,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 17:31:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2025-02-05 17:31:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 17:31:47,519 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 17:31:47,519 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] [2025-02-05 17:31:47,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 17:31:47,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 17:31:47,719 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 17:31:47,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 17:31:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1155762721, now seen corresponding path program 1 times [2025-02-05 17:31:47,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-05 17:31:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71617959] [2025-02-05 17:31:47,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 17:31:47,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2025-02-05 17:31:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/mathsat [2025-02-05 17:31:47,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2025-02-05 17:31:47,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2025-02-05 17:31:47,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes.