./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 16:29:55,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 16:29:55,829 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 16:29:55,836 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 16:29:55,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 16:29:55,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 16:29:55,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 16:29:55,856 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 16:29:55,856 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 16:29:55,856 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 16:29:55,857 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 16:29:55,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 16:29:55,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 16:29:55,858 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 16:29:55,858 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 16:29:55,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 16:29:55,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 16:29:55,859 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 16:29:55,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 16:29:55,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 16:29:55,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 16:29:55,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 16:29:55,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 16:29:55,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 16:29:55,865 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 16:29:55,865 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 16:29:55,865 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 16:29:55,865 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 16:29:55,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 16:29:55,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 16:29:55,866 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 16:29:55,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 16:29:55,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 16:29:55,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 16:29:55,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 16:29:55,867 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 16:29:55,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 16:29:55,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 16:29:55,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 16:29:55,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 16:29:55,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 16:29:55,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 16:29:55,868 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2024-11-19 16:29:56,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 16:29:56,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 16:29:56,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 16:29:56,080 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 16:29:56,080 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 16:29:56,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-19 16:29:57,288 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 16:29:57,427 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 16:29:57,427 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-19 16:29:57,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3811ce123/be3d0947ad514e0e8a5056138f1572ed/FLAGc0d68208d [2024-11-19 16:29:57,835 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3811ce123/be3d0947ad514e0e8a5056138f1572ed [2024-11-19 16:29:57,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 16:29:57,838 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 16:29:57,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 16:29:57,839 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 16:29:57,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 16:29:57,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:29:57" (1/1) ... [2024-11-19 16:29:57,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aea3bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:57, skipping insertion in model container [2024-11-19 16:29:57,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:29:57" (1/1) ... [2024-11-19 16:29:57,861 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 16:29:57,985 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-19 16:29:58,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 16:29:58,008 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 16:29:58,020 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-19 16:29:58,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 16:29:58,044 INFO L204 MainTranslator]: Completed translation [2024-11-19 16:29:58,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58 WrapperNode [2024-11-19 16:29:58,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 16:29:58,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 16:29:58,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 16:29:58,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 16:29:58,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,068 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2024-11-19 16:29:58,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 16:29:58,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 16:29:58,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 16:29:58,069 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 16:29:58,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,080 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,093 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-19 16:29:58,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,097 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,099 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,101 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,103 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 16:29:58,104 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 16:29:58,104 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 16:29:58,104 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 16:29:58,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (1/1) ... [2024-11-19 16:29:58,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 16:29:58,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:29:58,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 16:29:58,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 16:29:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 16:29:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 16:29:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 16:29:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 16:29:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 16:29:58,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 16:29:58,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 16:29:58,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 16:29:58,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 16:29:58,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 16:29:58,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-19 16:29:58,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-19 16:29:58,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 16:29:58,256 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 16:29:58,259 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 16:29:58,456 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-19 16:29:58,456 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 16:29:58,466 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 16:29:58,466 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-19 16:29:58,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:29:58 BoogieIcfgContainer [2024-11-19 16:29:58,467 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 16:29:58,469 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 16:29:58,470 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 16:29:58,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 16:29:58,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:29:57" (1/3) ... [2024-11-19 16:29:58,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15222080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:29:58, skipping insertion in model container [2024-11-19 16:29:58,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:58" (2/3) ... [2024-11-19 16:29:58,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15222080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:29:58, skipping insertion in model container [2024-11-19 16:29:58,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:29:58" (3/3) ... [2024-11-19 16:29:58,475 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2024-11-19 16:29:58,489 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 16:29:58,490 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 16:29:58,540 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 16:29:58,548 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;@2f362d66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 16:29:58,548 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 16:29:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:29:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-19 16:29:58,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:29:58,557 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:29:58,558 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:29:58,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:29:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2024-11-19 16:29:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:29:58,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456987422] [2024-11-19 16:29:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:29:58,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:29:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:29:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 16:29:58,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:29:58,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456987422] [2024-11-19 16:29:58,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456987422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:29:58,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 16:29:58,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 16:29:58,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516528310] [2024-11-19 16:29:58,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:29:58,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 16:29:58,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:29:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 16:29:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 16:29:58,746 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2024-11-19 16:29:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:29:58,805 INFO L93 Difference]: Finished difference Result 96 states and 155 transitions. [2024-11-19 16:29:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 16:29:58,807 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 [2024-11-19 16:29:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:29:58,811 INFO L225 Difference]: With dead ends: 96 [2024-11-19 16:29:58,812 INFO L226 Difference]: Without dead ends: 56 [2024-11-19 16:29:58,813 INFO L431 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 [2024-11-19 16:29:58,815 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 16:29:58,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 73 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:29:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-19 16:29:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2024-11-19 16:29:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:29:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-19 16:29:58,842 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 12 [2024-11-19 16:29:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:29:58,842 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-19 16:29:58,842 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) [2024-11-19 16:29:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-19 16:29:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 16:29:58,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:29:58,843 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:29:58,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 16:29:58,844 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:29:58,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:29:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2024-11-19 16:29:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:29:58,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824629146] [2024-11-19 16:29:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:29:58,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:29:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:29:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 16:29:59,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:29:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824629146] [2024-11-19 16:29:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824629146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:29:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640257471] [2024-11-19 16:29:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:29:59,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:29:59,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:29:59,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:29:59,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 16:29:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:29:59,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-19 16:29:59,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:29:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 16:29:59,111 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 16:29:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640257471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:29:59,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:29:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-19 16:29:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913224416] [2024-11-19 16:29:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:29:59,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 16:29:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:29:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 16:29:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 16:29:59,114 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2024-11-19 16:29:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:29:59,148 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2024-11-19 16:29:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 16:29:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 [2024-11-19 16:29:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:29:59,150 INFO L225 Difference]: With dead ends: 73 [2024-11-19 16:29:59,150 INFO L226 Difference]: Without dead ends: 42 [2024-11-19 16:29:59,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 16:29:59,151 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 3 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 16:29:59,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 75 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:29:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-19 16:29:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-19 16:29:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:29:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-11-19 16:29:59,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 16 [2024-11-19 16:29:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:29:59,157 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-11-19 16:29:59,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2024-11-19 16:29:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-11-19 16:29:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 16:29:59,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:29:59,157 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:29:59,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 16:29:59,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:29:59,358 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:29:59,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:29:59,359 INFO L85 PathProgramCache]: Analyzing trace with hash -107558025, now seen corresponding path program 1 times [2024-11-19 16:29:59,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:29:59,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359894527] [2024-11-19 16:29:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:29:59,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:29:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:29:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 16:29:59,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:29:59,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359894527] [2024-11-19 16:29:59,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359894527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:29:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293672772] [2024-11-19 16:29:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:29:59,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:29:59,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:29:59,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:29:59,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 16:29:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:29:59,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 16:29:59,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:29:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 16:29:59,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:29:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 16:29:59,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293672772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:29:59,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:29:59,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-19 16:29:59,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677112118] [2024-11-19 16:29:59,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:29:59,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 16:29:59,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:29:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 16:29:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 16:29:59,542 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2024-11-19 16:29:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:29:59,675 INFO L93 Difference]: Finished difference Result 151 states and 212 transitions. [2024-11-19 16:29:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 16:29:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 [2024-11-19 16:29:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:29:59,676 INFO L225 Difference]: With dead ends: 151 [2024-11-19 16:29:59,676 INFO L226 Difference]: Without dead ends: 114 [2024-11-19 16:29:59,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 16:29:59,678 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 128 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:29:59,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 122 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:29:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-19 16:29:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-19 16:29:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 103 states have internal predecessors, (139), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 16:29:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2024-11-19 16:29:59,693 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 157 transitions. Word has length 16 [2024-11-19 16:29:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:29:59,693 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 157 transitions. [2024-11-19 16:29:59,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2024-11-19 16:29:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 157 transitions. [2024-11-19 16:29:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 16:29:59,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:29:59,694 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:29:59,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 16:29:59,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-19 16:29:59,900 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:29:59,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:29:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2071104259, now seen corresponding path program 2 times [2024-11-19 16:29:59,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:29:59,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866396842] [2024-11-19 16:29:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:29:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:29:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:29:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 16:29:59,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:29:59,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866396842] [2024-11-19 16:29:59,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866396842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:29:59,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 16:29:59,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 16:29:59,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231760191] [2024-11-19 16:29:59,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:29:59,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 16:29:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:29:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 16:29:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 16:29:59,997 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-11-19 16:30:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:30:00,058 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2024-11-19 16:30:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 16:30:00,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 22 [2024-11-19 16:30:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:30:00,061 INFO L225 Difference]: With dead ends: 212 [2024-11-19 16:30:00,061 INFO L226 Difference]: Without dead ends: 118 [2024-11-19 16:30:00,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 16:30:00,063 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 16:30:00,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 93 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:30:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-19 16:30:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2024-11-19 16:30:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 104 states have internal predecessors, (140), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 16:30:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2024-11-19 16:30:00,102 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 22 [2024-11-19 16:30:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:30:00,103 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2024-11-19 16:30:00,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-11-19 16:30:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2024-11-19 16:30:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-19 16:30:00,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:30:00,103 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:30:00,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 16:30:00,104 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:30:00,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:30:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2024-11-19 16:30:00,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:30:00,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508546488] [2024-11-19 16:30:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:30:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 16:30:00,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:30:00,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508546488] [2024-11-19 16:30:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508546488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:30:00,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470788677] [2024-11-19 16:30:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:00,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:00,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:30:00,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:30:00,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 16:30:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:00,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 16:30:00,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:30:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 16:30:00,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:30:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 16:30:00,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470788677] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:30:00,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:30:00,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-19 16:30:00,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339507548] [2024-11-19 16:30:00,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:30:00,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 16:30:00,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:30:00,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 16:30:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2024-11-19 16:30:00,361 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2024-11-19 16:30:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:30:00,619 INFO L93 Difference]: Finished difference Result 376 states and 540 transitions. [2024-11-19 16:30:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 16:30:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 25 [2024-11-19 16:30:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:30:00,622 INFO L225 Difference]: With dead ends: 376 [2024-11-19 16:30:00,624 INFO L226 Difference]: Without dead ends: 272 [2024-11-19 16:30:00,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2024-11-19 16:30:00,625 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 567 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 16:30:00,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 250 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 16:30:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-19 16:30:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2024-11-19 16:30:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 242 states have internal predecessors, (327), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-19 16:30:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 369 transitions. [2024-11-19 16:30:00,662 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 369 transitions. Word has length 25 [2024-11-19 16:30:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:30:00,663 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 369 transitions. [2024-11-19 16:30:00,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2024-11-19 16:30:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 369 transitions. [2024-11-19 16:30:00,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 16:30:00,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:30:00,665 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:30:00,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 16:30:00,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:00,865 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:30:00,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:30:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash -34194041, now seen corresponding path program 2 times [2024-11-19 16:30:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:30:00,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423760241] [2024-11-19 16:30:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:30:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-19 16:30:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:30:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423760241] [2024-11-19 16:30:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423760241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:30:00,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 16:30:00,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 16:30:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39359368] [2024-11-19 16:30:00,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:30:00,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 16:30:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:30:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 16:30:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 16:30:00,985 INFO L87 Difference]: Start difference. First operand 265 states and 369 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-11-19 16:30:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:30:01,035 INFO L93 Difference]: Finished difference Result 485 states and 684 transitions. [2024-11-19 16:30:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 16:30:01,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 40 [2024-11-19 16:30:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:30:01,037 INFO L225 Difference]: With dead ends: 485 [2024-11-19 16:30:01,037 INFO L226 Difference]: Without dead ends: 260 [2024-11-19 16:30:01,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 16:30:01,039 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 16:30:01,040 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 91 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:30:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-19 16:30:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-11-19 16:30:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 238 states have internal predecessors, (321), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-19 16:30:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 361 transitions. [2024-11-19 16:30:01,062 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 361 transitions. Word has length 40 [2024-11-19 16:30:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:30:01,062 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 361 transitions. [2024-11-19 16:30:01,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-11-19 16:30:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 361 transitions. [2024-11-19 16:30:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 16:30:01,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:30:01,064 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:30:01,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 16:30:01,065 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:30:01,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:30:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1753085294, now seen corresponding path program 1 times [2024-11-19 16:30:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:30:01,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781528981] [2024-11-19 16:30:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:01,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:30:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:01,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:30:01,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781528981] [2024-11-19 16:30:01,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781528981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:30:01,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642567376] [2024-11-19 16:30:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:01,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:01,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:30:01,258 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:30:01,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 16:30:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:01,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 16:30:01,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:30:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:01,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:30:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642567376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:30:01,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:30:01,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-19 16:30:01,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823893470] [2024-11-19 16:30:01,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:30:01,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 16:30:01,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:30:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 16:30:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-19 16:30:01,563 INFO L87 Difference]: Start difference. First operand 260 states and 361 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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) [2024-11-19 16:30:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:30:01,954 INFO L93 Difference]: Finished difference Result 785 states and 1130 transitions. [2024-11-19 16:30:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-19 16:30:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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 41 [2024-11-19 16:30:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:30:01,957 INFO L225 Difference]: With dead ends: 785 [2024-11-19 16:30:01,957 INFO L226 Difference]: Without dead ends: 548 [2024-11-19 16:30:01,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-19 16:30:01,958 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 1295 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 16:30:01,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1338 Valid, 383 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 16:30:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-11-19 16:30:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2024-11-19 16:30:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 502 states have (on average 1.3565737051792828) internal successors, (681), 502 states have internal predecessors, (681), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-19 16:30:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 769 transitions. [2024-11-19 16:30:01,976 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 769 transitions. Word has length 41 [2024-11-19 16:30:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:30:01,977 INFO L471 AbstractCegarLoop]: Abstraction has 548 states and 769 transitions. [2024-11-19 16:30:01,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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) [2024-11-19 16:30:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 769 transitions. [2024-11-19 16:30:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-19 16:30:01,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:30:01,978 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:30:01,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 16:30:02,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:02,179 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:30:02,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:30:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1772381526, now seen corresponding path program 2 times [2024-11-19 16:30:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:30:02,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926609822] [2024-11-19 16:30:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:02,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:30:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:02,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:30:02,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926609822] [2024-11-19 16:30:02,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926609822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:30:02,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027694653] [2024-11-19 16:30:02,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 16:30:02,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:02,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:30:02,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:30:02,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 16:30:02,765 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 16:30:02,765 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:30:02,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 16:30:02,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:30:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:02,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:30:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:03,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027694653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:30:03,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:30:03,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-19 16:30:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861858109] [2024-11-19 16:30:03,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:30:03,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-19 16:30:03,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:30:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-19 16:30:03,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-19 16:30:03,507 INFO L87 Difference]: Start difference. First operand 548 states and 769 transitions. Second operand has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 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) [2024-11-19 16:30:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:30:04,638 INFO L93 Difference]: Finished difference Result 1625 states and 2354 transitions. [2024-11-19 16:30:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-19 16:30:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 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 65 [2024-11-19 16:30:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:30:04,646 INFO L225 Difference]: With dead ends: 1625 [2024-11-19 16:30:04,647 INFO L226 Difference]: Without dead ends: 1124 [2024-11-19 16:30:04,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-19 16:30:04,649 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2453 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2544 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 16:30:04,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2544 Valid, 787 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 16:30:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2024-11-19 16:30:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2024-11-19 16:30:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1030 states have (on average 1.3601941747572817) internal successors, (1401), 1030 states have internal predecessors, (1401), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-19 16:30:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1585 transitions. [2024-11-19 16:30:04,679 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1585 transitions. Word has length 65 [2024-11-19 16:30:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:30:04,681 INFO L471 AbstractCegarLoop]: Abstraction has 1124 states and 1585 transitions. [2024-11-19 16:30:04,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 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) [2024-11-19 16:30:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1585 transitions. [2024-11-19 16:30:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-19 16:30:04,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:30:04,684 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:30:04,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 16:30:04,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:04,885 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:30:04,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:30:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1315726042, now seen corresponding path program 3 times [2024-11-19 16:30:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:30:04,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33040865] [2024-11-19 16:30:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:30:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:06,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:30:06,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33040865] [2024-11-19 16:30:06,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33040865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:30:06,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084229136] [2024-11-19 16:30:06,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 16:30:06,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:06,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:30:06,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:30:06,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 16:30:06,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 16:30:06,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:30:06,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 16:30:06,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:30:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2024-11-19 16:30:06,454 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 16:30:06,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084229136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:30:06,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:30:06,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [49] total 53 [2024-11-19 16:30:06,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272921984] [2024-11-19 16:30:06,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:30:06,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 16:30:06,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:30:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 16:30:06,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2024-11-19 16:30:06,457 INFO L87 Difference]: Start difference. First operand 1124 states and 1585 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2024-11-19 16:30:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:30:06,517 INFO L93 Difference]: Finished difference Result 2144 states and 3063 transitions. [2024-11-19 16:30:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 16:30:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 113 [2024-11-19 16:30:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:30:06,523 INFO L225 Difference]: With dead ends: 2144 [2024-11-19 16:30:06,523 INFO L226 Difference]: Without dead ends: 1131 [2024-11-19 16:30:06,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2024-11-19 16:30:06,526 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 16:30:06,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 98 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:30:06,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2024-11-19 16:30:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1126. [2024-11-19 16:30:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1032 states have (on average 1.3604651162790697) internal successors, (1404), 1032 states have internal predecessors, (1404), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-19 16:30:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1588 transitions. [2024-11-19 16:30:06,551 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1588 transitions. Word has length 113 [2024-11-19 16:30:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:30:06,551 INFO L471 AbstractCegarLoop]: Abstraction has 1126 states and 1588 transitions. [2024-11-19 16:30:06,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2024-11-19 16:30:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1588 transitions. [2024-11-19 16:30:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-19 16:30:06,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:30:06,552 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:30:06,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 16:30:06,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:06,757 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:30:06,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:30:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1995784412, now seen corresponding path program 1 times [2024-11-19 16:30:06,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:30:06,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934589536] [2024-11-19 16:30:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:06,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:30:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:07,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:30:07,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934589536] [2024-11-19 16:30:07,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934589536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:30:07,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227129270] [2024-11-19 16:30:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:07,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:07,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:30:07,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:30:07,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 16:30:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:08,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-19 16:30:08,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:30:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:08,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:30:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:10,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227129270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:30:10,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:30:10,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-19 16:30:10,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896728539] [2024-11-19 16:30:10,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:30:10,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-19 16:30:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:30:10,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-19 16:30:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-19 16:30:10,201 INFO L87 Difference]: Start difference. First operand 1126 states and 1588 transitions. Second operand has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 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) [2024-11-19 16:30:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:30:15,888 INFO L93 Difference]: Finished difference Result 3309 states and 4808 transitions. [2024-11-19 16:30:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-19 16:30:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 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 113 [2024-11-19 16:30:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:30:15,896 INFO L225 Difference]: With dead ends: 3309 [2024-11-19 16:30:15,896 INFO L226 Difference]: Without dead ends: 2278 [2024-11-19 16:30:15,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-19 16:30:15,899 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 5688 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5875 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:30:15,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5875 Valid, 1559 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-19 16:30:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2024-11-19 16:30:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2278. [2024-11-19 16:30:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2088 states have (on average 1.3620689655172413) internal successors, (2844), 2088 states have internal predecessors, (2844), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2024-11-19 16:30:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3220 transitions. [2024-11-19 16:30:15,962 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3220 transitions. Word has length 113 [2024-11-19 16:30:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:30:15,963 INFO L471 AbstractCegarLoop]: Abstraction has 2278 states and 3220 transitions. [2024-11-19 16:30:15,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 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) [2024-11-19 16:30:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3220 transitions. [2024-11-19 16:30:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2024-11-19 16:30:15,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:30:15,965 INFO L215 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:30:15,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 16:30:16,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:16,166 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:30:16,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:30:16,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1143828796, now seen corresponding path program 2 times [2024-11-19 16:30:16,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:30:16,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884495573] [2024-11-19 16:30:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:30:16,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:30:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:30:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:19,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:30:19,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884495573] [2024-11-19 16:30:19,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884495573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:30:19,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841845750] [2024-11-19 16:30:19,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 16:30:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:30:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:30:19,990 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:30:19,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 16:30:20,170 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 16:30:20,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:30:20,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-19 16:30:20,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:30:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:20,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:30:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:30:27,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841845750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:30:27,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:30:27,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-11-19 16:30:27,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405495782] [2024-11-19 16:30:27,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:30:27,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-19 16:30:27,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:30:27,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-19 16:30:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-19 16:30:27,241 INFO L87 Difference]: Start difference. First operand 2278 states and 3220 transitions. Second operand has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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) [2024-11-19 16:31:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:31:29,855 INFO L93 Difference]: Finished difference Result 6669 states and 9704 transitions. [2024-11-19 16:31:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-19 16:31:29,856 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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 209 [2024-11-19 16:31:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:31:29,870 INFO L225 Difference]: With dead ends: 6669 [2024-11-19 16:31:29,870 INFO L226 Difference]: Without dead ends: 4582 [2024-11-19 16:31:29,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-19 16:31:29,876 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 15748 mSDsluCounter, 2797 mSDsCounter, 0 mSdLazyCounter, 2892 mSolverCounterSat, 1196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16127 SdHoareTripleChecker+Valid, 2853 SdHoareTripleChecker+Invalid, 4088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1196 IncrementalHoareTripleChecker+Valid, 2892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-19 16:31:29,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16127 Valid, 2853 Invalid, 4088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1196 Valid, 2892 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-19 16:31:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2024-11-19 16:31:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4582. [2024-11-19 16:31:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4200 states have (on average 1.3628571428571428) internal successors, (5724), 4200 states have internal predecessors, (5724), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2024-11-19 16:31:29,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 6484 transitions. [2024-11-19 16:31:29,962 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 6484 transitions. Word has length 209 [2024-11-19 16:31:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:31:29,962 INFO L471 AbstractCegarLoop]: Abstraction has 4582 states and 6484 transitions. [2024-11-19 16:31:29,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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) [2024-11-19 16:31:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 6484 transitions. [2024-11-19 16:31:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2024-11-19 16:31:29,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:31:29,966 INFO L215 NwaCegarLoop]: trace histogram [190, 190, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:31:29,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 16:31:30,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 16:31:30,167 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:31:30,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:31:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1342680580, now seen corresponding path program 3 times [2024-11-19 16:31:30,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:31:30,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563802618] [2024-11-19 16:31:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:31:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:31:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat