./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:28:51,258 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:28:51,313 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:28:51,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:28:51,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:28:51,335 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:28:51,336 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:28:51,336 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:28:51,337 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:28:51,337 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:28:51,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:28:51,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:28:51,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:28:51,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:28:51,339 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:28:51,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:28:51,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:28:51,340 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:28:51,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:28:51,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:28:51,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:28:51,342 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:28:51,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:28:51,346 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:28:51,346 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:28:51,347 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:28:51,347 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:28:51,347 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:28:51,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:28:51,347 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:28:51,348 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:28:51,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:28:51,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:28:51,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:28:51,348 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:28:51,349 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:28:51,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:28:51,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:28:51,350 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:28:51,350 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:28:51,351 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:28:51,351 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:28:51,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b [2024-10-23 19:28:51,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:28:51,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:28:51,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:28:51,650 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:28:51,650 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:28:51,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2024-10-23 19:28:53,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:28:53,230 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:28:53,230 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2024-10-23 19:28:53,237 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d11485e8c/740b32f6df31466db8f194f4be7d1838/FLAG97475d2ed [2024-10-23 19:28:53,251 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d11485e8c/740b32f6df31466db8f194f4be7d1838 [2024-10-23 19:28:53,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:28:53,255 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:28:53,256 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:28:53,257 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:28:53,262 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:28:53,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40eb4449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53, skipping insertion in model container [2024-10-23 19:28:53,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,285 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:28:53,462 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/array-examples/sanfoundry_02_ground.i[813,826] [2024-10-23 19:28:53,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:28:53,498 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:28:53,512 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/array-examples/sanfoundry_02_ground.i[813,826] [2024-10-23 19:28:53,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:28:53,546 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:28:53,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53 WrapperNode [2024-10-23 19:28:53,546 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:28:53,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:28:53,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:28:53,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:28:53,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,592 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 93 [2024-10-23 19:28:53,595 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:28:53,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:28:53,596 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:28:53,596 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:28:53,607 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,610 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,628 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 1 writes are split as follows [0, 1]. [2024-10-23 19:28:53,629 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,630 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,638 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,642 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:28:53,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:28:53,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:28:53,657 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:28:53,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (1/1) ... [2024-10-23 19:28:53,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:28:53,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:28:53,698 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) [2024-10-23 19:28:53,702 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 [2024-10-23 19:28:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:28:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:28:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:28:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 19:28:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:28:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:28:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:28:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:28:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:28:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:28:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-23 19:28:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-23 19:28:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 19:28:53,850 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:28:53,857 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:28:54,042 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-23 19:28:54,042 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:28:54,070 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:28:54,070 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-23 19:28:54,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:28:54 BoogieIcfgContainer [2024-10-23 19:28:54,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:28:54,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:28:54,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:28:54,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:28:54,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:28:53" (1/3) ... [2024-10-23 19:28:54,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7664b0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:28:54, skipping insertion in model container [2024-10-23 19:28:54,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:28:53" (2/3) ... [2024-10-23 19:28:54,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7664b0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:28:54, skipping insertion in model container [2024-10-23 19:28:54,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:28:54" (3/3) ... [2024-10-23 19:28:54,077 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2024-10-23 19:28:54,091 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:28:54,092 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:28:54,145 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:28:54,151 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;@642fe55f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:28:54,151 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:28:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:28:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-23 19:28:54,160 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:28:54,161 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:28:54,161 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:28:54,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:28:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1444274552, now seen corresponding path program 1 times [2024-10-23 19:28:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:28:54,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859058734] [2024-10-23 19:28:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:28:54,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:28:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:28:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:28:54,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:28:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859058734] [2024-10-23 19:28:54,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859058734] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:28:54,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:28:54,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 19:28:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721120106] [2024-10-23 19:28:54,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:28:54,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:28:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:28:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:28:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:28:54,456 INFO L87 Difference]: Start difference. First operand has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:28:54,512 INFO L93 Difference]: Finished difference Result 51 states and 79 transitions. [2024-10-23 19:28:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:28:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-23 19:28:54,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:28:54,522 INFO L225 Difference]: With dead ends: 51 [2024-10-23 19:28:54,522 INFO L226 Difference]: Without dead ends: 25 [2024-10-23 19:28:54,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:28:54,531 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:28:54,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:28:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-23 19:28:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-23 19:28:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:28:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-10-23 19:28:54,571 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 12 [2024-10-23 19:28:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:28:54,572 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-10-23 19:28:54,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-10-23 19:28:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-23 19:28:54,575 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:28:54,575 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:28:54,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:28:54,576 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:28:54,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:28:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2140809395, now seen corresponding path program 1 times [2024-10-23 19:28:54,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:28:54,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174890119] [2024-10-23 19:28:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:28:54,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:28:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:28:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:28:54,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:28:54,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174890119] [2024-10-23 19:28:54,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174890119] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:28:54,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57770811] [2024-10-23 19:28:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:28:54,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:28:54,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:28:54,692 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) [2024-10-23 19:28:54,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:28:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:28:54,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-23 19:28:54,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:28:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 19:28:54,783 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:28:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57770811] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:28:54,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:28:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-10-23 19:28:54,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651203264] [2024-10-23 19:28:54,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:28:54,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:28:54,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:28:54,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:28:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:28:54,787 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:28:54,820 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-10-23 19:28:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:28:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-23 19:28:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:28:54,822 INFO L225 Difference]: With dead ends: 44 [2024-10-23 19:28:54,822 INFO L226 Difference]: Without dead ends: 29 [2024-10-23 19:28:54,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:28:54,824 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:28:54,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:28:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-23 19:28:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2024-10-23 19:28:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:28:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2024-10-23 19:28:54,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2024-10-23 19:28:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:28:54,832 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2024-10-23 19:28:54,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2024-10-23 19:28:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-23 19:28:54,834 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:28:54,834 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:28:54,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 19:28:55,039 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 [2024-10-23 19:28:55,040 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:28:55,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:28:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1482269539, now seen corresponding path program 1 times [2024-10-23 19:28:55,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:28:55,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357909373] [2024-10-23 19:28:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:28:55,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:28:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:28:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 19:28:55,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:28:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357909373] [2024-10-23 19:28:55,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357909373] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:28:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425539855] [2024-10-23 19:28:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:28:55,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:28:55,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:28:55,136 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) [2024-10-23 19:28:55,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:28:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:28:55,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:28:55,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:28:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 19:28:55,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:28:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 19:28:55,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425539855] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:28:55,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:28:55,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-23 19:28:55,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688996319] [2024-10-23 19:28:55,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:28:55,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 19:28:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:28:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 19:28:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:28:55,252 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:28:55,306 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2024-10-23 19:28:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 19:28:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-23 19:28:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:28:55,308 INFO L225 Difference]: With dead ends: 56 [2024-10-23 19:28:55,308 INFO L226 Difference]: Without dead ends: 33 [2024-10-23 19:28:55,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:28:55,309 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:28:55,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:28:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-23 19:28:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-23 19:28:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:28:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-10-23 19:28:55,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2024-10-23 19:28:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:28:55,315 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-10-23 19:28:55,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-10-23 19:28:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-23 19:28:55,315 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:28:55,316 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:28:55,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-23 19:28:55,516 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 [2024-10-23 19:28:55,517 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:28:55,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:28:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash 865968072, now seen corresponding path program 2 times [2024-10-23 19:28:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:28:55,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282871708] [2024-10-23 19:28:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:28:55,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:28:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:28:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 19:28:55,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:28:55,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282871708] [2024-10-23 19:28:55,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282871708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:28:55,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028051282] [2024-10-23 19:28:55,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:28:55,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:28:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:28:55,712 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) [2024-10-23 19:28:55,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:28:55,796 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:28:55,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:28:55,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-23 19:28:55,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:28:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-23 19:28:55,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:28:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-23 19:28:55,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028051282] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:28:55,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:28:55,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-10-23 19:28:55,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834961144] [2024-10-23 19:28:55,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:28:55,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-23 19:28:55,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:28:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-23 19:28:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2024-10-23 19:28:55,943 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:28:56,091 INFO L93 Difference]: Finished difference Result 90 states and 133 transitions. [2024-10-23 19:28:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-23 19:28:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-23 19:28:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:28:56,094 INFO L225 Difference]: With dead ends: 90 [2024-10-23 19:28:56,094 INFO L226 Difference]: Without dead ends: 63 [2024-10-23 19:28:56,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2024-10-23 19:28:56,096 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:28:56,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 88 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:28:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-23 19:28:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-23 19:28:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:28:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2024-10-23 19:28:56,105 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 22 [2024-10-23 19:28:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:28:56,106 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2024-10-23 19:28:56,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2024-10-23 19:28:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-23 19:28:56,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:28:56,107 INFO L215 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:28:56,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 19:28:56,308 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 [2024-10-23 19:28:56,308 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:28:56,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:28:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash -30062168, now seen corresponding path program 3 times [2024-10-23 19:28:56,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:28:56,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651518133] [2024-10-23 19:28:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:28:56,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:28:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:28:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-23 19:28:56,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:28:56,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651518133] [2024-10-23 19:28:56,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651518133] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:28:56,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372607322] [2024-10-23 19:28:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:28:56,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:28:56,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:28:56,620 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) [2024-10-23 19:28:56,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 19:28:56,726 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-23 19:28:56,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:28:56,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 19:28:56,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:28:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-23 19:28:56,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:28:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-23 19:28:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372607322] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:28:56,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:28:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-23 19:28:56,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901625149] [2024-10-23 19:28:56,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:28:56,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-23 19:28:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:28:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-23 19:28:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-23 19:28:57,000 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:28:57,282 INFO L93 Difference]: Finished difference Result 174 states and 265 transitions. [2024-10-23 19:28:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-23 19:28:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-23 19:28:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:28:57,284 INFO L225 Difference]: With dead ends: 174 [2024-10-23 19:28:57,284 INFO L226 Difference]: Without dead ends: 123 [2024-10-23 19:28:57,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-23 19:28:57,285 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 250 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:28:57,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 119 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:28:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-23 19:28:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-10-23 19:28:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.3865546218487395) internal successors, (165), 119 states have internal predecessors, (165), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:28:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2024-10-23 19:28:57,313 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 46 [2024-10-23 19:28:57,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:28:57,314 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2024-10-23 19:28:57,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:28:57,314 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2024-10-23 19:28:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-23 19:28:57,318 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:28:57,318 INFO L215 NwaCegarLoop]: trace histogram [22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:28:57,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-23 19:28:57,519 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 [2024-10-23 19:28:57,520 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:28:57,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:28:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash -877423256, now seen corresponding path program 4 times [2024-10-23 19:28:57,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:28:57,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506104793] [2024-10-23 19:28:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:28:57,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:28:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:28:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2024-10-23 19:28:58,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:28:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506104793] [2024-10-23 19:28:58,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506104793] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:28:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3163876] [2024-10-23 19:28:58,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:28:58,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:28:58,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:28:58,408 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) [2024-10-23 19:28:58,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 19:28:58,568 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:28:58,569 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:28:58,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-23 19:28:58,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:28:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-23 19:28:58,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:28:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-23 19:28:59,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3163876] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:28:59,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:28:59,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2024-10-23 19:28:59,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985423514] [2024-10-23 19:28:59,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:28:59,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-23 19:28:59,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:28:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-23 19:28:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2024-10-23 19:28:59,485 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand has 46 states, 46 states have (on average 3.5869565217391304) internal successors, (165), 46 states have internal predecessors, (165), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:29:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:29:00,014 INFO L93 Difference]: Finished difference Result 332 states and 511 transitions. [2024-10-23 19:29:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-23 19:29:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.5869565217391304) internal successors, (165), 46 states have internal predecessors, (165), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-10-23 19:29:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:29:00,017 INFO L225 Difference]: With dead ends: 332 [2024-10-23 19:29:00,017 INFO L226 Difference]: Without dead ends: 233 [2024-10-23 19:29:00,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2024-10-23 19:29:00,023 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 619 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-23 19:29:00,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 122 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-23 19:29:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-10-23 19:29:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2024-10-23 19:29:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.3930131004366813) internal successors, (319), 229 states have internal predecessors, (319), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:29:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 323 transitions. [2024-10-23 19:29:00,045 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 323 transitions. Word has length 94 [2024-10-23 19:29:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:29:00,046 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 323 transitions. [2024-10-23 19:29:00,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.5869565217391304) internal successors, (165), 46 states have internal predecessors, (165), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:29:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 323 transitions. [2024-10-23 19:29:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-10-23 19:29:00,052 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:29:00,052 INFO L215 NwaCegarLoop]: trace histogram [44, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:29:00,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 19:29:00,252 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 [2024-10-23 19:29:00,253 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:29:00,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:29:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash 750197832, now seen corresponding path program 5 times [2024-10-23 19:29:00,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:29:00,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218923719] [2024-10-23 19:29:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:29:00,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:29:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:29:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3615 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2024-10-23 19:29:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:29:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218923719] [2024-10-23 19:29:02,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218923719] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:29:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388766847] [2024-10-23 19:29:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:29:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:29:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:29:02,587 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) [2024-10-23 19:29:02,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 19:29:39,012 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2024-10-23 19:29:39,012 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:29:39,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-23 19:29:39,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:29:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3615 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2024-10-23 19:29:39,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:29:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3615 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2024-10-23 19:29:41,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388766847] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:29:41,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:29:41,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 92 [2024-10-23 19:29:41,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634050918] [2024-10-23 19:29:41,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:29:41,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-10-23 19:29:41,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:29:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-10-23 19:29:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2024-10-23 19:29:41,594 INFO L87 Difference]: Start difference. First operand 233 states and 323 transitions. Second operand has 93 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 92 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:29:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:29:43,646 INFO L93 Difference]: Finished difference Result 650 states and 1013 transitions. [2024-10-23 19:29:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-10-23 19:29:43,647 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 92 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2024-10-23 19:29:43,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:29:43,649 INFO L225 Difference]: With dead ends: 650 [2024-10-23 19:29:43,649 INFO L226 Difference]: Without dead ends: 463 [2024-10-23 19:29:43,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2024-10-23 19:29:43,653 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1910 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-23 19:29:43,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1910 Valid, 189 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-23 19:29:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-10-23 19:29:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2024-10-23 19:29:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 459 states have (on average 1.3965141612200436) internal successors, (641), 459 states have internal predecessors, (641), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 19:29:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 645 transitions. [2024-10-23 19:29:43,679 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 645 transitions. Word has length 182 [2024-10-23 19:29:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:29:43,679 INFO L471 AbstractCegarLoop]: Abstraction has 463 states and 645 transitions. [2024-10-23 19:29:43,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 92 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:29:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 645 transitions. [2024-10-23 19:29:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2024-10-23 19:29:43,684 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:29:43,684 INFO L215 NwaCegarLoop]: trace histogram [90, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:29:43,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-23 19:29:43,885 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 [2024-10-23 19:29:43,885 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:29:43,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:29:43,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1044151640, now seen corresponding path program 6 times [2024-10-23 19:29:43,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:29:43,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449151348] [2024-10-23 19:29:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:29:43,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:29:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:29:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15667 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 11572 trivial. 0 not checked. [2024-10-23 19:29:50,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:29:50,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449151348] [2024-10-23 19:29:50,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449151348] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:29:50,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148079264] [2024-10-23 19:29:50,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:29:50,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:29:50,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:29:50,798 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) [2024-10-23 19:29:50,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process