./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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/reducercommutativity/rangesum60.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 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:08:33,144 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:08:33,215 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:08:33,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:08:33,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:08:33,255 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:08:33,256 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:08:33,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:08:33,257 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:08:33,258 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:08:33,259 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:08:33,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:08:33,260 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:08:33,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:08:33,260 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:08:33,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:08:33,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:08:33,264 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:08:33,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:08:33,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:08:33,265 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:08:33,265 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:08:33,266 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:08:33,266 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:08:33,266 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:08:33,266 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:08:33,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:08:33,266 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:08:33,267 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:08:33,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:08:33,267 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:08:33,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:08:33,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:08:33,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:08:33,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:08:33,268 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:08:33,268 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:08:33,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:08:33,269 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:08:33,269 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:08:33,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:08:33,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:08:33,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2024-10-13 22:08:33,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:08:33,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:08:33,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:08:33,567 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:08:33,567 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:08:33,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2024-10-13 22:08:35,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:08:35,252 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:08:35,254 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2024-10-13 22:08:35,265 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/288f2e3dd/68265b8ca3404236bcf21b56489cabc5/FLAGf94345995 [2024-10-13 22:08:35,630 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/288f2e3dd/68265b8ca3404236bcf21b56489cabc5 [2024-10-13 22:08:35,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:08:35,633 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:08:35,634 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:08:35,634 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:08:35,638 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:08:35,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,639 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56db19c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35, skipping insertion in model container [2024-10-13 22:08:35,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,661 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:08:35,817 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2024-10-13 22:08:35,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:08:35,830 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:08:35,855 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2024-10-13 22:08:35,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:08:35,870 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:08:35,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35 WrapperNode [2024-10-13 22:08:35,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:08:35,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:08:35,872 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:08:35,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:08:35,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,885 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,901 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-10-13 22:08:35,902 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:08:35,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:08:35,903 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:08:35,903 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:08:35,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,915 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,928 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-13 22:08:35,929 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,939 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,941 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,943 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:08:35,944 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:08:35,944 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:08:35,944 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:08:35,947 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (1/1) ... [2024-10-13 22:08:35,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:08:35,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:35,978 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) [2024-10-13 22:08:35,985 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 [2024-10-13 22:08:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:08:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:08:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:08:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 22:08:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:08:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:08:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:08:36,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:08:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:08:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:08:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2024-10-13 22:08:36,038 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2024-10-13 22:08:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 22:08:36,105 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:08:36,107 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:08:36,313 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-10-13 22:08:36,313 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:08:36,359 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:08:36,359 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 22:08:36,363 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:08:36 BoogieIcfgContainer [2024-10-13 22:08:36,363 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:08:36,365 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:08:36,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:08:36,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:08:36,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:08:35" (1/3) ... [2024-10-13 22:08:36,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d055bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:08:36, skipping insertion in model container [2024-10-13 22:08:36,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:08:35" (2/3) ... [2024-10-13 22:08:36,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d055bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:08:36, skipping insertion in model container [2024-10-13 22:08:36,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:08:36" (3/3) ... [2024-10-13 22:08:36,375 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2024-10-13 22:08:36,400 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:08:36,400 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:08:36,476 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:08:36,485 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;@7fb6abc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:08:36,486 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:08:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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) [2024-10-13 22:08:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 22:08:36,498 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:36,499 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:36,499 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:36,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:36,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1502132506, now seen corresponding path program 1 times [2024-10-13 22:08:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142802753] [2024-10-13 22:08:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:36,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:36,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-13 22:08:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:36,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 22:08:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:36,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:08:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:08:36,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:36,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142802753] [2024-10-13 22:08:36,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142802753] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:08:36,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:08:36,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:08:36,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24205896] [2024-10-13 22:08:36,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:08:36,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:08:36,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:08:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:08:36,980 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:08:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:37,029 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2024-10-13 22:08:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:08:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-10-13 22:08:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:37,041 INFO L225 Difference]: With dead ends: 45 [2024-10-13 22:08:37,041 INFO L226 Difference]: Without dead ends: 22 [2024-10-13 22:08:37,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:08:37,049 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:37,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-13 22:08:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-13 22:08:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2024-10-13 22:08:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-10-13 22:08:37,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2024-10-13 22:08:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:37,102 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-10-13 22:08:37,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:08:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-10-13 22:08:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 22:08:37,106 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:37,106 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:37,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:08:37,107 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:37,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash -432814053, now seen corresponding path program 1 times [2024-10-13 22:08:37,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:37,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310071105] [2024-10-13 22:08:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:08:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-13 22:08:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 22:08:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 22:08:37,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:37,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310071105] [2024-10-13 22:08:37,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310071105] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125961320] [2024-10-13 22:08:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:37,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:37,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:37,345 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) [2024-10-13 22:08:37,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:08:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 22:08:37,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:08:37,504 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:08:37,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125961320] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:08:37,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:08:37,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-13 22:08:37,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563196885] [2024-10-13 22:08:37,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:08:37,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:08:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:08:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:08:37,510 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:08:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:37,543 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2024-10-13 22:08:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:08:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-13 22:08:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:37,545 INFO L225 Difference]: With dead ends: 42 [2024-10-13 22:08:37,545 INFO L226 Difference]: Without dead ends: 25 [2024-10-13 22:08:37,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:08:37,546 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:37,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:37,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-13 22:08:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-13 22:08:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2024-10-13 22:08:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-13 22:08:37,557 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2024-10-13 22:08:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:37,558 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-13 22:08:37,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:08:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-13 22:08:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-13 22:08:37,561 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:37,562 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:37,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 22:08:37,763 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 [2024-10-13 22:08:37,764 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:37,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash 28977858, now seen corresponding path program 1 times [2024-10-13 22:08:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:37,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106975196] [2024-10-13 22:08:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:08:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-13 22:08:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-13 22:08:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-13 22:08:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106975196] [2024-10-13 22:08:37,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106975196] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482572956] [2024-10-13 22:08:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:37,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:37,929 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) [2024-10-13 22:08:37,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:08:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 22:08:38,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-13 22:08:38,033 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:08:38,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482572956] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:08:38,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:08:38,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-13 22:08:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438492798] [2024-10-13 22:08:38,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:08:38,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:08:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:08:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:08:38,038 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:08:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:38,057 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-10-13 22:08:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:08:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-10-13 22:08:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:38,059 INFO L225 Difference]: With dead ends: 40 [2024-10-13 22:08:38,060 INFO L226 Difference]: Without dead ends: 25 [2024-10-13 22:08:38,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:08:38,062 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:38,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-13 22:08:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-13 22:08:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2024-10-13 22:08:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-13 22:08:38,073 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 38 [2024-10-13 22:08:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:38,074 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-13 22:08:38,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:08:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-13 22:08:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:08:38,078 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:38,078 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:38,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:38,278 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 [2024-10-13 22:08:38,279 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:38,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2098863663, now seen corresponding path program 1 times [2024-10-13 22:08:38,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:38,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742313827] [2024-10-13 22:08:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:38,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:08:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-13 22:08:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-13 22:08:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:08:38,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:38,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742313827] [2024-10-13 22:08:38,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742313827] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:38,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788801930] [2024-10-13 22:08:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:38,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:38,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:38,489 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) [2024-10-13 22:08:38,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:08:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 22:08:38,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:08:38,604 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:08:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788801930] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:08:38,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:08:38,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-13 22:08:38,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907389819] [2024-10-13 22:08:38,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:08:38,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:08:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:08:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:08:38,611 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:08:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:38,638 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2024-10-13 22:08:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:08:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-10-13 22:08:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:38,640 INFO L225 Difference]: With dead ends: 49 [2024-10-13 22:08:38,641 INFO L226 Difference]: Without dead ends: 29 [2024-10-13 22:08:38,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:08:38,643 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:38,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-13 22:08:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-13 22:08:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2024-10-13 22:08:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-10-13 22:08:38,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 39 [2024-10-13 22:08:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:38,655 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-10-13 22:08:38,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:08:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-10-13 22:08:38,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:08:38,656 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:38,656 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:38,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:38,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:38,858 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:38,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1976122640, now seen corresponding path program 1 times [2024-10-13 22:08:38,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:38,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752698448] [2024-10-13 22:08:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:38,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:08:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-13 22:08:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-13 22:08:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:08:38,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752698448] [2024-10-13 22:08:38,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752698448] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:38,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722233136] [2024-10-13 22:08:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:38,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:38,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:38,955 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) [2024-10-13 22:08:38,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:08:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:39,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 22:08:39,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:08:39,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:08:39,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722233136] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:39,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:39,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-10-13 22:08:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284591822] [2024-10-13 22:08:39,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:39,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 22:08:39,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 22:08:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:08:39,125 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:08:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:39,150 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-10-13 22:08:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:08:39,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2024-10-13 22:08:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:39,152 INFO L225 Difference]: With dead ends: 58 [2024-10-13 22:08:39,152 INFO L226 Difference]: Without dead ends: 32 [2024-10-13 22:08:39,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:08:39,153 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:39,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-13 22:08:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-13 22:08:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2024-10-13 22:08:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-10-13 22:08:39,160 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 39 [2024-10-13 22:08:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:39,160 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-10-13 22:08:39,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:08:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-10-13 22:08:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 22:08:39,162 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:39,162 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:39,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:39,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:39,363 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:39,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash -71399842, now seen corresponding path program 2 times [2024-10-13 22:08:39,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:39,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428439828] [2024-10-13 22:08:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:39,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:08:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:39,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 22:08:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:39,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-13 22:08:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-13 22:08:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428439828] [2024-10-13 22:08:39,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428439828] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193525350] [2024-10-13 22:08:39,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:08:39,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:39,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:39,429 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) [2024-10-13 22:08:39,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:08:39,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:08:39,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:08:39,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 22:08:39,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:08:39,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:08:39,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193525350] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:39,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:39,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-13 22:08:39,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416936528] [2024-10-13 22:08:39,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:39,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:08:39,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:39,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:08:39,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:08:39,645 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:08:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:39,689 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2024-10-13 22:08:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 22:08:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-10-13 22:08:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:39,694 INFO L225 Difference]: With dead ends: 68 [2024-10-13 22:08:39,694 INFO L226 Difference]: Without dead ends: 42 [2024-10-13 22:08:39,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:08:39,695 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:39,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-13 22:08:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-10-13 22:08:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2024-10-13 22:08:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-10-13 22:08:39,705 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2024-10-13 22:08:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:39,705 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-10-13 22:08:39,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:08:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-10-13 22:08:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-13 22:08:39,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:39,707 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:39,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:39,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:39,912 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:39,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1756456273, now seen corresponding path program 3 times [2024-10-13 22:08:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:39,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882896899] [2024-10-13 22:08:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:39,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:08:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-13 22:08:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-13 22:08:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-10-13 22:08:40,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:40,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882896899] [2024-10-13 22:08:40,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882896899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:40,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941533462] [2024-10-13 22:08:40,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:08:40,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:40,034 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) [2024-10-13 22:08:40,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:08:40,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 22:08:40,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:08:40,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 22:08:40,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-10-13 22:08:40,138 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:08:40,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941533462] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:08:40,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:08:40,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-10-13 22:08:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545757051] [2024-10-13 22:08:40,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:08:40,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:08:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:40,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:08:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:08:40,141 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:08:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:40,174 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2024-10-13 22:08:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:08:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-10-13 22:08:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:40,176 INFO L225 Difference]: With dead ends: 71 [2024-10-13 22:08:40,176 INFO L226 Difference]: Without dead ends: 44 [2024-10-13 22:08:40,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:08:40,177 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:40,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-13 22:08:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2024-10-13 22:08:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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) [2024-10-13 22:08:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-10-13 22:08:40,189 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 57 [2024-10-13 22:08:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:40,189 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-10-13 22:08:40,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:08:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-10-13 22:08:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-13 22:08:40,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:40,191 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:40,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:40,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:40,396 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:40,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash 882234655, now seen corresponding path program 1 times [2024-10-13 22:08:40,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:40,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040177722] [2024-10-13 22:08:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:08:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-13 22:08:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-13 22:08:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-10-13 22:08:40,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:40,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040177722] [2024-10-13 22:08:40,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040177722] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:40,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880833337] [2024-10-13 22:08:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:40,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:40,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:40,504 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) [2024-10-13 22:08:40,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:08:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:40,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 22:08:40,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-10-13 22:08:40,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-10-13 22:08:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880833337] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:41,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:41,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 12, 13] total 26 [2024-10-13 22:08:41,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933179011] [2024-10-13 22:08:41,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:41,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 22:08:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 22:08:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-10-13 22:08:41,007 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:08:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:41,066 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2024-10-13 22:08:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 22:08:41,066 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 66 [2024-10-13 22:08:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:41,067 INFO L225 Difference]: With dead ends: 79 [2024-10-13 22:08:41,067 INFO L226 Difference]: Without dead ends: 52 [2024-10-13 22:08:41,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-10-13 22:08:41,068 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:41,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-13 22:08:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-13 22:08:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 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) [2024-10-13 22:08:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-10-13 22:08:41,075 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 66 [2024-10-13 22:08:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:41,075 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-10-13 22:08:41,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:08:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-10-13 22:08:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-13 22:08:41,077 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:41,077 INFO L215 NwaCegarLoop]: trace histogram [22, 9, 9, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:41,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:41,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:41,278 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:41,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:41,278 INFO L85 PathProgramCache]: Analyzing trace with hash -450693842, now seen corresponding path program 2 times [2024-10-13 22:08:41,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:41,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398777093] [2024-10-13 22:08:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:41,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:41,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-13 22:08:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:41,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-13 22:08:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:42,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-13 22:08:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-13 22:08:42,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:42,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398777093] [2024-10-13 22:08:42,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398777093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:42,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948088789] [2024-10-13 22:08:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:08:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:42,013 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) [2024-10-13 22:08:42,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:08:42,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:08:42,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:08:42,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 22:08:42,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-13 22:08:42,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-13 22:08:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948088789] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:43,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:43,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 49 [2024-10-13 22:08:43,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182753326] [2024-10-13 22:08:43,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:43,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-13 22:08:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-13 22:08:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 22:08:43,012 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:08:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:43,082 INFO L93 Difference]: Finished difference Result 104 states and 139 transitions. [2024-10-13 22:08:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-13 22:08:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 79 [2024-10-13 22:08:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:43,084 INFO L225 Difference]: With dead ends: 104 [2024-10-13 22:08:43,084 INFO L226 Difference]: Without dead ends: 76 [2024-10-13 22:08:43,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 22:08:43,086 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:43,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 178 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:08:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-13 22:08:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-10-13 22:08:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 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) [2024-10-13 22:08:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2024-10-13 22:08:43,093 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 79 [2024-10-13 22:08:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:43,094 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2024-10-13 22:08:43,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:08:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2024-10-13 22:08:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-13 22:08:43,095 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:43,096 INFO L215 NwaCegarLoop]: trace histogram [46, 9, 9, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:43,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:43,299 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,SelfDestructingSolverStorable8 [2024-10-13 22:08:43,300 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:43,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:43,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1917299246, now seen corresponding path program 3 times [2024-10-13 22:08:43,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:43,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076672190] [2024-10-13 22:08:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:43,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:45,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-13 22:08:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:45,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-13 22:08:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:45,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-10-13 22:08:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-13 22:08:45,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:45,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076672190] [2024-10-13 22:08:45,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076672190] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:45,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982445920] [2024-10-13 22:08:45,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:08:45,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:45,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:45,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:08:45,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:08:45,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:08:45,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:08:45,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:08:45,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2024-10-13 22:08:45,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2024-10-13 22:08:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982445920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:45,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:45,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 55 [2024-10-13 22:08:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829676387] [2024-10-13 22:08:45,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:45,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-13 22:08:45,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:45,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-13 22:08:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=1767, Unknown=0, NotChecked=0, Total=2970 [2024-10-13 22:08:45,740 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 55 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 55 states have internal predecessors, (86), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:08:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:45,809 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2024-10-13 22:08:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-13 22:08:45,809 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 55 states have internal predecessors, (86), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 103 [2024-10-13 22:08:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:45,810 INFO L225 Difference]: With dead ends: 109 [2024-10-13 22:08:45,810 INFO L226 Difference]: Without dead ends: 81 [2024-10-13 22:08:45,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1203, Invalid=1767, Unknown=0, NotChecked=0, Total=2970 [2024-10-13 22:08:45,812 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:45,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:08:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-13 22:08:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-10-13 22:08:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 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) [2024-10-13 22:08:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2024-10-13 22:08:45,821 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 103 [2024-10-13 22:08:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:45,822 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2024-10-13 22:08:45,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 55 states have internal predecessors, (86), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:08:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2024-10-13 22:08:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-10-13 22:08:45,827 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:45,827 INFO L215 NwaCegarLoop]: trace histogram [47, 9, 9, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:45,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 22:08:46,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 22:08:46,032 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:46,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1351664252, now seen corresponding path program 4 times [2024-10-13 22:08:46,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:46,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539255371] [2024-10-13 22:08:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:46,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:47,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-13 22:08:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:48,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-13 22:08:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:48,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-10-13 22:08:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-10-13 22:08:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:48,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539255371] [2024-10-13 22:08:48,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539255371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:48,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450525805] [2024-10-13 22:08:48,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:08:48,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:48,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:48,021 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:08:48,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:08:48,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:08:48,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:08:48,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:08:48,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1213 trivial. 0 not checked. [2024-10-13 22:08:48,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1213 trivial. 0 not checked. [2024-10-13 22:08:48,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450525805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:48,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:48,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2024-10-13 22:08:48,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81455766] [2024-10-13 22:08:48,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:48,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-13 22:08:48,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-13 22:08:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1252, Invalid=1828, Unknown=0, NotChecked=0, Total=3080 [2024-10-13 22:08:48,425 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:08:48,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:48,527 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2024-10-13 22:08:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-10-13 22:08:48,527 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 108 [2024-10-13 22:08:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:48,530 INFO L225 Difference]: With dead ends: 126 [2024-10-13 22:08:48,531 INFO L226 Difference]: Without dead ends: 94 [2024-10-13 22:08:48,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1252, Invalid=1828, Unknown=0, NotChecked=0, Total=3080 [2024-10-13 22:08:48,533 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:48,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 152 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:08:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-10-13 22:08:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-10-13 22:08:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 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) [2024-10-13 22:08:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2024-10-13 22:08:48,542 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 108 [2024-10-13 22:08:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:48,542 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2024-10-13 22:08:48,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:08:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2024-10-13 22:08:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-10-13 22:08:48,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:48,544 INFO L215 NwaCegarLoop]: trace histogram [48, 21, 21, 18, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:48,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 22:08:48,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 22:08:48,745 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:48,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash -455079314, now seen corresponding path program 5 times [2024-10-13 22:08:48,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:48,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080853586] [2024-10-13 22:08:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:48,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:50,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-13 22:08:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:50,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-13 22:08:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:50,658 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-10-13 22:08:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-10-13 22:08:50,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:50,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080853586] [2024-10-13 22:08:50,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080853586] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:50,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961976388] [2024-10-13 22:08:50,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:08:50,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:50,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:08:50,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 22:08:51,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-10-13 22:08:51,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:08:51,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 22:08:51,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 363 proven. 7 refuted. 0 times theorem prover too weak. 1535 trivial. 0 not checked. [2024-10-13 22:08:51,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 37 proven. 131 refuted. 0 times theorem prover too weak. 1737 trivial. 0 not checked. [2024-10-13 22:08:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961976388] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:52,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:52,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 6, 6] total 59 [2024-10-13 22:08:52,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17366807] [2024-10-13 22:08:52,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:52,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-13 22:08:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-13 22:08:52,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=2103, Unknown=0, NotChecked=0, Total=3422 [2024-10-13 22:08:52,054 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:08:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:52,177 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2024-10-13 22:08:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-10-13 22:08:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 145 [2024-10-13 22:08:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:52,182 INFO L225 Difference]: With dead ends: 157 [2024-10-13 22:08:52,183 INFO L226 Difference]: Without dead ends: 113 [2024-10-13 22:08:52,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1319, Invalid=2103, Unknown=0, NotChecked=0, Total=3422 [2024-10-13 22:08:52,186 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:52,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 254 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:08:52,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-13 22:08:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-10-13 22:08:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.1018518518518519) internal successors, (119), 108 states have internal predecessors, (119), 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) [2024-10-13 22:08:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2024-10-13 22:08:52,196 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 145 [2024-10-13 22:08:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:52,196 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2024-10-13 22:08:52,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:08:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2024-10-13 22:08:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-10-13 22:08:52,199 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:52,199 INFO L215 NwaCegarLoop]: trace histogram [49, 39, 39, 21, 18, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:52,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:52,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 22:08:52,400 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:52,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash 990292892, now seen corresponding path program 6 times [2024-10-13 22:08:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:52,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583091556] [2024-10-13 22:08:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:54,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-13 22:08:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:54,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-10-13 22:08:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:54,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-10-13 22:08:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2376 trivial. 0 not checked. [2024-10-13 22:08:54,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:54,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583091556] [2024-10-13 22:08:54,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583091556] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:54,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712100134] [2024-10-13 22:08:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:08:54,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:54,160 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:08:54,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 22:08:54,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-13 22:08:54,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:08:54,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:08:54,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 1076 proven. 21 refuted. 0 times theorem prover too weak. 2504 trivial. 0 not checked. [2024-10-13 22:08:54,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3580 trivial. 0 not checked. [2024-10-13 22:08:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712100134] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:55,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 9] total 66 [2024-10-13 22:08:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189571430] [2024-10-13 22:08:55,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:55,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-13 22:08:55,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-13 22:08:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=2845, Unknown=0, NotChecked=0, Total=4290 [2024-10-13 22:08:55,097 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:08:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:55,196 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2024-10-13 22:08:55,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-13 22:08:55,196 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 200 [2024-10-13 22:08:55,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:55,198 INFO L225 Difference]: With dead ends: 184 [2024-10-13 22:08:55,198 INFO L226 Difference]: Without dead ends: 122 [2024-10-13 22:08:55,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1445, Invalid=2845, Unknown=0, NotChecked=0, Total=4290 [2024-10-13 22:08:55,202 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:55,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:08:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-13 22:08:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-10-13 22:08:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 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) [2024-10-13 22:08:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2024-10-13 22:08:55,216 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 200 [2024-10-13 22:08:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:55,216 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2024-10-13 22:08:55,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:08:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2024-10-13 22:08:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2024-10-13 22:08:55,219 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:55,219 INFO L215 NwaCegarLoop]: trace histogram [50, 39, 39, 21, 18, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:55,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 22:08:55,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 22:08:55,420 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:55,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:55,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1255585074, now seen corresponding path program 7 times [2024-10-13 22:08:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:55,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555291886] [2024-10-13 22:08:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:55,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:57,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-13 22:08:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:57,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-10-13 22:08:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:57,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-10-13 22:08:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3735 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2024-10-13 22:08:57,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:57,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555291886] [2024-10-13 22:08:57,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555291886] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:57,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738711731] [2024-10-13 22:08:57,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:08:57,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:57,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:57,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:08:57,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 22:08:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:57,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-13 22:08:57,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:08:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3735 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2024-10-13 22:08:57,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:08:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3735 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2024-10-13 22:08:59,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738711731] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:08:59,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:08:59,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 63 [2024-10-13 22:08:59,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351337838] [2024-10-13 22:08:59,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:08:59,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-13 22:08:59,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:08:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-13 22:08:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2024-10-13 22:08:59,239 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand has 63 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:08:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:08:59,308 INFO L93 Difference]: Finished difference Result 202 states and 235 transitions. [2024-10-13 22:08:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-13 22:08:59,309 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 209 [2024-10-13 22:08:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:08:59,310 INFO L225 Difference]: With dead ends: 202 [2024-10-13 22:08:59,310 INFO L226 Difference]: Without dead ends: 132 [2024-10-13 22:08:59,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 371 SyntacticMatches, 42 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2024-10-13 22:08:59,312 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:08:59,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:08:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-13 22:08:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-10-13 22:08:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 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) [2024-10-13 22:08:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2024-10-13 22:08:59,325 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 209 [2024-10-13 22:08:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:08:59,325 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2024-10-13 22:08:59,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 22:08:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2024-10-13 22:08:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2024-10-13 22:08:59,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:08:59,332 INFO L215 NwaCegarLoop]: trace histogram [60, 39, 39, 21, 18, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:08:59,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 22:08:59,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 22:08:59,533 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:08:59,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:08:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 177726350, now seen corresponding path program 8 times [2024-10-13 22:08:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:08:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075108629] [2024-10-13 22:08:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:08:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:08:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:59,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-13 22:08:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:59,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-10-13 22:08:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:59,889 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-10-13 22:08:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:08:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 133 proven. 1131 refuted. 0 times theorem prover too weak. 3026 trivial. 0 not checked. [2024-10-13 22:08:59,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:08:59,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075108629] [2024-10-13 22:08:59,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075108629] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:08:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078850411] [2024-10-13 22:08:59,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:08:59,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:08:59,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:08:59,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:08:59,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 22:09:00,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:09:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:09:00,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:09:00,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:09:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 669 proven. 57 refuted. 0 times theorem prover too weak. 3564 trivial. 0 not checked. [2024-10-13 22:09:00,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:09:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 133 proven. 1131 refuted. 0 times theorem prover too weak. 3026 trivial. 0 not checked. [2024-10-13 22:09:00,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078850411] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:09:00,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:09:00,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-13 22:09:00,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491566345] [2024-10-13 22:09:00,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:09:00,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 22:09:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:09:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 22:09:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:09:00,413 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-13 22:09:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:09:00,480 INFO L93 Difference]: Finished difference Result 224 states and 257 transitions. [2024-10-13 22:09:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 22:09:00,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 219 [2024-10-13 22:09:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:09:00,482 INFO L225 Difference]: With dead ends: 224 [2024-10-13 22:09:00,482 INFO L226 Difference]: Without dead ends: 156 [2024-10-13 22:09:00,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:09:00,483 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:09:00,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:09:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-10-13 22:09:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-10-13 22:09:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0728476821192052) internal successors, (162), 151 states have internal predecessors, (162), 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) [2024-10-13 22:09:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2024-10-13 22:09:00,493 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 219 [2024-10-13 22:09:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:09:00,493 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2024-10-13 22:09:00,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-13 22:09:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2024-10-13 22:09:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2024-10-13 22:09:00,496 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:09:00,496 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 60, 42, 21, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:09:00,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 22:09:00,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:09:00,697 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:09:00,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:09:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1836779534, now seen corresponding path program 9 times [2024-10-13 22:09:00,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:09:00,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465094418] [2024-10-13 22:09:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:09:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:09:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:01,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-13 22:09:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:01,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-10-13 22:09:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:01,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2024-10-13 22:09:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7998 backedges. 293 proven. 3039 refuted. 0 times theorem prover too weak. 4666 trivial. 0 not checked. [2024-10-13 22:09:01,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:09:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465094418] [2024-10-13 22:09:01,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465094418] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:09:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169989533] [2024-10-13 22:09:01,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:09:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:09:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:09:01,457 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:09:01,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 22:09:02,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-13 22:09:02,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:09:02,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 22:09:02,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:09:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7998 backedges. 2740 proven. 105 refuted. 0 times theorem prover too weak. 5153 trivial. 0 not checked. [2024-10-13 22:09:02,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:09:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7998 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 7893 trivial. 0 not checked. [2024-10-13 22:09:03,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169989533] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:09:03,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:09:03,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2024-10-13 22:09:03,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257481918] [2024-10-13 22:09:03,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:09:03,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-13 22:09:03,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:09:03,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-13 22:09:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2024-10-13 22:09:03,140 INFO L87 Difference]: Start difference. First operand 156 states and 168 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:09:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:09:03,249 INFO L93 Difference]: Finished difference Result 268 states and 310 transitions. [2024-10-13 22:09:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-13 22:09:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 291 [2024-10-13 22:09:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:09:03,251 INFO L225 Difference]: With dead ends: 268 [2024-10-13 22:09:03,251 INFO L226 Difference]: Without dead ends: 176 [2024-10-13 22:09:03,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2024-10-13 22:09:03,252 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:09:03,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 147 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:09:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-13 22:09:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2024-10-13 22:09:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0647058823529412) internal successors, (181), 170 states have internal predecessors, (181), 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) [2024-10-13 22:09:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 187 transitions. [2024-10-13 22:09:03,261 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 187 transitions. Word has length 291 [2024-10-13 22:09:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:09:03,262 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 187 transitions. [2024-10-13 22:09:03,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:09:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 187 transitions. [2024-10-13 22:09:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2024-10-13 22:09:03,265 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:09:03,265 INFO L215 NwaCegarLoop]: trace histogram [66, 66, 60, 45, 30, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:09:03,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 22:09:03,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 22:09:03,466 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:09:03,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:09:03,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1234044249, now seen corresponding path program 10 times [2024-10-13 22:09:03,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:09:03,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651643919] [2024-10-13 22:09:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:09:03,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:09:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:03,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-13 22:09:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:04,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-10-13 22:09:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:04,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2024-10-13 22:09:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8943 backedges. 313 proven. 3345 refuted. 0 times theorem prover too weak. 5285 trivial. 0 not checked. [2024-10-13 22:09:04,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:09:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651643919] [2024-10-13 22:09:04,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651643919] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:09:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548562331] [2024-10-13 22:09:04,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:09:04,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:09:04,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:09:04,224 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:09:04,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 22:09:04,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:09:04,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:09:04,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 22:09:04,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:09:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8943 backedges. 2949 proven. 672 refuted. 0 times theorem prover too weak. 5322 trivial. 0 not checked. [2024-10-13 22:09:04,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:09:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8943 backedges. 43 proven. 3672 refuted. 0 times theorem prover too weak. 5228 trivial. 0 not checked. [2024-10-13 22:09:05,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548562331] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:09:05,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:09:05,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 33 [2024-10-13 22:09:05,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941351937] [2024-10-13 22:09:05,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:09:05,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-13 22:09:05,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:09:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-13 22:09:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-13 22:09:05,229 INFO L87 Difference]: Start difference. First operand 175 states and 187 transitions. Second operand has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-13 22:09:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:09:05,341 INFO L93 Difference]: Finished difference Result 334 states and 375 transitions. [2024-10-13 22:09:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-13 22:09:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 316 [2024-10-13 22:09:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:09:05,343 INFO L225 Difference]: With dead ends: 334 [2024-10-13 22:09:05,343 INFO L226 Difference]: Without dead ends: 223 [2024-10-13 22:09:05,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 610 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-13 22:09:05,344 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:09:05,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 57 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:09:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-10-13 22:09:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2024-10-13 22:09:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0504587155963303) internal successors, (229), 218 states have internal predecessors, (229), 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) [2024-10-13 22:09:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 235 transitions. [2024-10-13 22:09:05,354 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 235 transitions. Word has length 316 [2024-10-13 22:09:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:09:05,354 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 235 transitions. [2024-10-13 22:09:05,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-13 22:09:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 235 transitions. [2024-10-13 22:09:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2024-10-13 22:09:05,357 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:09:05,357 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 93, 60, 30, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:09:05,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-13 22:09:05,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 22:09:05,558 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:09:05,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:09:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 234906023, now seen corresponding path program 11 times [2024-10-13 22:09:05,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:09:05,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241172495] [2024-10-13 22:09:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:09:05,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:09:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:06,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-13 22:09:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:06,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2024-10-13 22:09:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:06,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2024-10-13 22:09:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21975 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 21510 trivial. 0 not checked. [2024-10-13 22:09:06,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:09:06,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241172495] [2024-10-13 22:09:06,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241172495] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:09:06,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088341942] [2024-10-13 22:09:06,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:09:06,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:09:06,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:09:06,839 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:09:06,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 22:09:07,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-10-13 22:09:07,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:09:07,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 22:09:07,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:09:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21975 backedges. 9795 proven. 222 refuted. 0 times theorem prover too weak. 11958 trivial. 0 not checked. [2024-10-13 22:09:07,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:09:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21975 backedges. 975 proven. 3142 refuted. 0 times theorem prover too weak. 17858 trivial. 0 not checked. [2024-10-13 22:09:07,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088341942] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:09:07,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:09:07,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 16, 16] total 61 [2024-10-13 22:09:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922845643] [2024-10-13 22:09:07,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:09:07,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-13 22:09:07,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:09:07,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-13 22:09:07,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2698, Unknown=0, NotChecked=0, Total=3660 [2024-10-13 22:09:07,863 INFO L87 Difference]: Start difference. First operand 223 states and 235 transitions. Second operand has 61 states, 61 states have (on average 2.278688524590164) internal successors, (139), 61 states have internal predecessors, (139), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:09:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:09:08,027 INFO L93 Difference]: Finished difference Result 443 states and 509 transitions. [2024-10-13 22:09:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-13 22:09:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.278688524590164) internal successors, (139), 61 states have internal predecessors, (139), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 460 [2024-10-13 22:09:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:09:08,030 INFO L225 Difference]: With dead ends: 443 [2024-10-13 22:09:08,030 INFO L226 Difference]: Without dead ends: 284 [2024-10-13 22:09:08,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=962, Invalid=2698, Unknown=0, NotChecked=0, Total=3660 [2024-10-13 22:09:08,033 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:09:08,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 177 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:09:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-10-13 22:09:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2024-10-13 22:09:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.1111111111111112) internal successors, (310), 279 states have internal predecessors, (310), 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) [2024-10-13 22:09:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 316 transitions. [2024-10-13 22:09:08,044 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 316 transitions. Word has length 460 [2024-10-13 22:09:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:09:08,044 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 316 transitions. [2024-10-13 22:09:08,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.278688524590164) internal successors, (139), 61 states have internal predecessors, (139), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:09:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 316 transitions. [2024-10-13 22:09:08,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2024-10-13 22:09:08,049 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:09:08,049 INFO L215 NwaCegarLoop]: trace histogram [174, 174, 93, 81, 60, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:09:08,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-13 22:09:08,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 22:09:08,253 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:09:08,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:09:08,253 INFO L85 PathProgramCache]: Analyzing trace with hash -865224114, now seen corresponding path program 12 times [2024-10-13 22:09:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:09:08,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161621386] [2024-10-13 22:09:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:09:08,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:09:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:09,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-13 22:09:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:09,649 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2024-10-13 22:09:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:09,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2024-10-13 22:09:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:09:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 48016 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 47520 trivial. 0 not checked. [2024-10-13 22:09:09,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:09:09,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161621386] [2024-10-13 22:09:09,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161621386] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:09:09,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030760553] [2024-10-13 22:09:09,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:09:09,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:09:09,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:09:09,702 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:09:09,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 22:10:04,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-10-13 22:10:04,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:10:04,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-13 22:10:04,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:10:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 48016 backedges. 20426 proven. 496 refuted. 0 times theorem prover too weak. 27094 trivial. 0 not checked. [2024-10-13 22:10:04,620 INFO L311 TraceCheckSpWp]: Computing backward predicates...