./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/vnew2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/vnew2.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cb26fc448cefa547e2463448c16c0efba841bf620bbd2ba420ae15e288e3a3f --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:57:03,022 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:57:03,057 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:57:03,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:57:03,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:57:03,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:57:03,074 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:57:03,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:57:03,074 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:57:03,074 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:57:03,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:57:03,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:57:03,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:57:03,075 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:57:03,076 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:57:03,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:57:03,076 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:57:03,076 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 -> 6cb26fc448cefa547e2463448c16c0efba841bf620bbd2ba420ae15e288e3a3f [2025-02-05 14:57:03,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:57:03,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:57:03,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:57:03,276 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:57:03,276 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:57:03,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/vnew2.c [2025-02-05 14:57:04,435 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/42f078b75/539c0c359cda4d519989f99929c948ba/FLAG401fabbab [2025-02-05 14:57:04,634 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:57:04,634 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/vnew2.c [2025-02-05 14:57:04,643 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/42f078b75/539c0c359cda4d519989f99929c948ba/FLAG401fabbab [2025-02-05 14:57:04,660 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/42f078b75/539c0c359cda4d519989f99929c948ba [2025-02-05 14:57:04,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:57:04,663 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:57:04,664 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:57:04,664 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:57:04,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:57:04,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117a2b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04, skipping insertion in model container [2025-02-05 14:57:04,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,676 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:57:04,754 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/loops-crafted-1/vnew2.c[403,416] [2025-02-05 14:57:04,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:57:04,770 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:57:04,777 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/loops-crafted-1/vnew2.c[403,416] [2025-02-05 14:57:04,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:57:04,792 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:57:04,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04 WrapperNode [2025-02-05 14:57:04,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:57:04,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:57:04,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:57:04,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:57:04,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,812 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2025-02-05 14:57:04,813 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:57:04,814 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:57:04,814 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:57:04,814 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:57:04,822 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,824 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,834 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 14:57:04,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,836 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,837 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:57:04,841 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:57:04,841 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:57:04,841 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:57:04,842 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (1/1) ... [2025-02-05 14:57:04,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:57:04,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:57:04,865 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 14:57:04,867 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 14:57:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:57:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:57:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 14:57:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:57:04,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:57:04,929 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:57:04,931 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:57:05,029 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-02-05 14:57:05,031 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:57:05,038 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:57:05,038 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:57:05,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:57:05 BoogieIcfgContainer [2025-02-05 14:57:05,039 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:57:05,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:57:05,041 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:57:05,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:57:05,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:57:04" (1/3) ... [2025-02-05 14:57:05,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4a71b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:57:05, skipping insertion in model container [2025-02-05 14:57:05,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:57:04" (2/3) ... [2025-02-05 14:57:05,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4a71b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:57:05, skipping insertion in model container [2025-02-05 14:57:05,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:57:05" (3/3) ... [2025-02-05 14:57:05,046 INFO L128 eAbstractionObserver]: Analyzing ICFG vnew2.c [2025-02-05 14:57:05,057 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:57:05,059 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG vnew2.c that has 1 procedures, 13 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-05 14:57:05,096 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:57:05,112 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;@70e24eb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:57:05,113 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:57:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:57:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-05 14:57:05,121 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:57:05,122 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:57:05,122 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:57:05,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:57:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1956902029, now seen corresponding path program 1 times [2025-02-05 14:57:05,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:57:05,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392484972] [2025-02-05 14:57:05,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:57:05,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:57:05,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 14:57:05,244 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 14:57:05,246 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:57:05,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:57:05,461 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 14:57:05,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:57:05,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392484972] [2025-02-05 14:57:05,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392484972] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:57:05,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:57:05,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 14:57:05,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603489399] [2025-02-05 14:57:05,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:57:05,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:57:05,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:57:05,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:57:05,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:57:05,477 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:57:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:57:05,499 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2025-02-05 14:57:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:57:05,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-02-05 14:57:05,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:57:05,504 INFO L225 Difference]: With dead ends: 25 [2025-02-05 14:57:05,504 INFO L226 Difference]: Without dead ends: 9 [2025-02-05 14:57:05,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:57:05,508 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:57:05,508 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:57:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-02-05 14:57:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-02-05 14:57:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:57:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2025-02-05 14:57:05,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2025-02-05 14:57:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:57:05,526 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2025-02-05 14:57:05,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:57:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2025-02-05 14:57:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-05 14:57:05,527 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:57:05,527 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:57:05,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 14:57:05,528 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:57:05,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:57:05,528 INFO L85 PathProgramCache]: Analyzing trace with hash 533588566, now seen corresponding path program 1 times [2025-02-05 14:57:05,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:57:05,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206034474] [2025-02-05 14:57:05,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:57:05,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:57:05,537 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 14:57:05,577 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 14:57:05,580 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:57:05,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:57:05,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937637054] [2025-02-05 14:57:05,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:57:05,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:57:05,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:57:05,586 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 14:57:05,589 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 14:57:05,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 14:57:05,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 14:57:05,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:57:05,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:57:05,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 14:57:05,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:57:05,820 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 14:57:05,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:57:06,021 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 14:57:06,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:57:06,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206034474] [2025-02-05 14:57:06,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:57:06,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937637054] [2025-02-05 14:57:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937637054] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:57:06,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:57:06,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2025-02-05 14:57:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294744880] [2025-02-05 14:57:06,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:57:06,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 14:57:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:57:06,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 14:57:06,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:57:06,029 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:57:08,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 14:57:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:57:08,446 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2025-02-05 14:57:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 14:57:08,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-05 14:57:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:57:08,447 INFO L225 Difference]: With dead ends: 18 [2025-02-05 14:57:08,447 INFO L226 Difference]: Without dead ends: 12 [2025-02-05 14:57:08,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:57:08,448 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:57:08,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-02-05 14:57:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-02-05 14:57:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-02-05 14:57:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:57:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2025-02-05 14:57:08,451 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2025-02-05 14:57:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:57:08,451 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2025-02-05 14:57:08,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:57:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2025-02-05 14:57:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 14:57:08,452 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:57:08,452 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:57:08,461 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 14:57:08,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:57:08,656 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:57:08,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:57:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -363356467, now seen corresponding path program 2 times [2025-02-05 14:57:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:57:08,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748658872] [2025-02-05 14:57:08,657 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:57:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:57:08,662 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-05 14:57:08,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 14:57:08,676 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:57:08,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:57:08,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334979527] [2025-02-05 14:57:08,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:57:08,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:57:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:57:08,678 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 14:57:08,680 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 14:57:08,705 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-05 14:57:08,733 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 14:57:08,733 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:57:08,733 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:57:08,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-05 14:57:08,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:57:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:57:08,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:57:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:57:09,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:57:09,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748658872] [2025-02-05 14:57:09,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:57:09,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334979527] [2025-02-05 14:57:09,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334979527] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:57:09,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:57:09,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2025-02-05 14:57:09,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659759125] [2025-02-05 14:57:09,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:57:09,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 14:57:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:57:09,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 14:57:09,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-02-05 14:57:09,506 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:57:33,819 WARN L286 SmtUtils]: Spent 11.49s on a formula simplification. DAG size of input: 90 DAG size of output: 55 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 14:57:35,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 14:57:45,827 WARN L286 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 78 DAG size of output: 60 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 14:58:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:58:11,616 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2025-02-05 14:58:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 14:58:11,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 14:58:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:58:11,620 INFO L225 Difference]: With dead ends: 27 [2025-02-05 14:58:11,620 INFO L226 Difference]: Without dead ends: 18 [2025-02-05 14:58:11,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 59.0s TimeCoverageRelationStatistics Valid=225, Invalid=475, Unknown=2, NotChecked=0, Total=702 [2025-02-05 14:58:11,621 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:58:11,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 25 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2025-02-05 14:58:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-02-05 14:58:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-02-05 14:58:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:58:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2025-02-05 14:58:11,628 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2025-02-05 14:58:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:58:11,628 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2025-02-05 14:58:11,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:58:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2025-02-05 14:58:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-05 14:58:11,633 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:58:11,633 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:58:11,639 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 14:58:11,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:58:11,833 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:58:11,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:58:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash -240139731, now seen corresponding path program 3 times [2025-02-05 14:58:11,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:58:11,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742211733] [2025-02-05 14:58:11,835 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:58:11,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:58:11,842 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 6 equivalence classes. [2025-02-05 14:58:11,947 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 17 of 17 statements. [2025-02-05 14:58:11,947 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 14:58:11,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:58:11,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245634377] [2025-02-05 14:58:11,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:58:11,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:58:11,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:58:11,950 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 14:58:11,952 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 14:58:11,972 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 6 equivalence classes. [2025-02-05 14:58:12,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 17 of 17 statements. [2025-02-05 14:58:12,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 14:58:12,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:58:12,048 WARN L254 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-02-05 14:58:12,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:58:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:58:12,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:58:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:58:13,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:58:13,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742211733] [2025-02-05 14:58:13,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:58:13,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245634377] [2025-02-05 14:58:13,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245634377] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:58:13,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:58:13,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2025-02-05 14:58:13,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874942073] [2025-02-05 14:58:13,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:58:13,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 14:58:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:58:13,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 14:58:13,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2025-02-05 14:58:13,486 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)