./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_strcmp_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/array-examples/standard_strcmp_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 c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 15:25:04,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 15:25:04,828 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 15:25:04,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 15:25:04,834 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 15:25:04,856 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 15:25:04,857 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 15:25:04,858 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 15:25:04,858 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 15:25:04,858 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 15:25:04,859 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 15:25:04,859 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 15:25:04,860 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 15:25:04,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 15:25:04,860 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 15:25:04,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 15:25:04,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 15:25:04,862 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 15:25:04,862 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 15:25:04,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 15:25:04,863 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 15:25:04,863 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 15:25:04,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 15:25:04,864 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 15:25:04,864 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 15:25:04,864 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 15:25:04,865 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 15:25:04,865 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 15:25:04,866 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 15:25:04,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 15:25:04,866 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 15:25:04,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 15:25:04,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:25:04,867 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 15:25:04,867 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 15:25:04,868 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 15:25:04,868 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 15:25:04,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 15:25:04,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 15:25:04,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 15:25:04,869 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 15:25:04,871 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 15:25:04,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 [2024-11-11 15:25:05,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 15:25:05,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 15:25:05,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 15:25:05,174 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 15:25:05,174 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 15:25:05,175 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2024-11-11 15:25:06,599 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 15:25:06,801 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 15:25:06,802 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2024-11-11 15:25:06,813 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df4efa72/4c8614a6d4c04766b8c7c7cabe31c50d/FLAG7ce43b8c3 [2024-11-11 15:25:06,827 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df4efa72/4c8614a6d4c04766b8c7c7cabe31c50d [2024-11-11 15:25:06,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 15:25:06,831 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 15:25:06,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 15:25:06,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 15:25:06,839 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 15:25:06,839 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:25:06" (1/1) ... [2024-11-11 15:25:06,840 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56bbf735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:06, skipping insertion in model container [2024-11-11 15:25:06,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:25:06" (1/1) ... [2024-11-11 15:25:06,860 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 15:25:07,078 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcmp_ground.i[815,828] [2024-11-11 15:25:07,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:25:07,112 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 15:25:07,126 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcmp_ground.i[815,828] [2024-11-11 15:25:07,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:25:07,159 INFO L204 MainTranslator]: Completed translation [2024-11-11 15:25:07,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07 WrapperNode [2024-11-11 15:25:07,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 15:25:07,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 15:25:07,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 15:25:07,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 15:25:07,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,174 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,195 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2024-11-11 15:25:07,196 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 15:25:07,197 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 15:25:07,198 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 15:25:07,198 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 15:25:07,208 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,210 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,238 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 3, 3]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-11 15:25:07,241 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,242 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,247 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,252 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 15:25:07,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 15:25:07,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 15:25:07,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 15:25:07,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (1/1) ... [2024-11-11 15:25:07,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:25:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:25:07,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 15:25:07,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 15:25:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 15:25:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 15:25:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 15:25:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 15:25:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 15:25:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 15:25:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 15:25:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 15:25:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 15:25:07,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 15:25:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 15:25:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 15:25:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 15:25:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 15:25:07,434 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 15:25:07,437 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 15:25:07,600 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-11 15:25:07,600 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 15:25:07,616 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 15:25:07,617 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-11 15:25:07,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:25:07 BoogieIcfgContainer [2024-11-11 15:25:07,618 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 15:25:07,621 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 15:25:07,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 15:25:07,626 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 15:25:07,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:25:06" (1/3) ... [2024-11-11 15:25:07,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f130cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:25:07, skipping insertion in model container [2024-11-11 15:25:07,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:25:07" (2/3) ... [2024-11-11 15:25:07,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f130cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:25:07, skipping insertion in model container [2024-11-11 15:25:07,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:25:07" (3/3) ... [2024-11-11 15:25:07,630 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2024-11-11 15:25:07,644 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 15:25:07,644 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 15:25:07,700 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 15:25:07,706 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;@1a05e041, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 15:25:07,706 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 15:25:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-11 15:25:07,714 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:07,715 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:07,715 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:07,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:07,720 INFO L85 PathProgramCache]: Analyzing trace with hash -380323295, now seen corresponding path program 1 times [2024-11-11 15:25:07,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:07,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911418562] [2024-11-11 15:25:07,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:07,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:25:07,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911418562] [2024-11-11 15:25:07,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911418562] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:25:07,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:25:07,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 15:25:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813864480] [2024-11-11 15:25:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:25:07,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 15:25:07,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:25:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 15:25:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 15:25:07,998 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:25:08,028 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-11-11 15:25:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 15:25:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-11 15:25:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:25:08,038 INFO L225 Difference]: With dead ends: 40 [2024-11-11 15:25:08,039 INFO L226 Difference]: Without dead ends: 18 [2024-11-11 15:25:08,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 15:25:08,047 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:25:08,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:25:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-11 15:25:08,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2024-11-11 15:25:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-11-11 15:25:08,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2024-11-11 15:25:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:25:08,081 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-11-11 15:25:08,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-11 15:25:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-11 15:25:08,082 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:08,082 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:08,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 15:25:08,083 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:08,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1385790102, now seen corresponding path program 1 times [2024-11-11 15:25:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:08,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885221942] [2024-11-11 15:25:08,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:08,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:25:08,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885221942] [2024-11-11 15:25:08,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885221942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:25:08,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456409103] [2024-11-11 15:25:08,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:08,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:08,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:25:08,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:25:08,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 15:25:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:08,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-11 15:25:08,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:25:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 15:25:08,356 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 15:25:08,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456409103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:25:08,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 15:25:08,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-11 15:25:08,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146440754] [2024-11-11 15:25:08,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:25:08,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 15:25:08,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:25:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 15:25:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 15:25:08,366 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:25:08,407 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-11 15:25:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 15:25:08,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-11 15:25:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:25:08,408 INFO L225 Difference]: With dead ends: 29 [2024-11-11 15:25:08,408 INFO L226 Difference]: Without dead ends: 20 [2024-11-11 15:25:08,408 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 15:25:08,409 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:25:08,410 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:25:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-11 15:25:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-11-11 15:25:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-11 15:25:08,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-11-11 15:25:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:25:08,418 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-11 15:25:08,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-11 15:25:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-11 15:25:08,420 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:08,420 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:08,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 15:25:08,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:08,625 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:08,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1305944738, now seen corresponding path program 1 times [2024-11-11 15:25:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:08,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242205949] [2024-11-11 15:25:08,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:08,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:25:08,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:08,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242205949] [2024-11-11 15:25:08,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242205949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:25:08,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649432620] [2024-11-11 15:25:08,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:25:08,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:25:08,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 15:25:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:08,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-11 15:25:08,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:25:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:25:08,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:25:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:25:08,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649432620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:25:08,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:25:08,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-11 15:25:08,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910428726] [2024-11-11 15:25:08,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:25:08,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-11 15:25:08,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:25:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-11 15:25:08,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-11 15:25:08,849 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:25:08,892 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-11-11 15:25:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 15:25:08,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-11 15:25:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:25:08,893 INFO L225 Difference]: With dead ends: 37 [2024-11-11 15:25:08,893 INFO L226 Difference]: Without dead ends: 24 [2024-11-11 15:25:08,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-11 15:25:08,895 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:25:08,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:25:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-11 15:25:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-11 15:25:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-11 15:25:08,902 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2024-11-11 15:25:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:25:08,903 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-11 15:25:08,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-11 15:25:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-11 15:25:08,904 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:08,904 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:08,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 15:25:09,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-11 15:25:09,109 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:09,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:09,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1315958376, now seen corresponding path program 2 times [2024-11-11 15:25:09,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:09,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042996826] [2024-11-11 15:25:09,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:09,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 15:25:09,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:09,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042996826] [2024-11-11 15:25:09,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042996826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:25:09,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:25:09,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 15:25:09,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080079029] [2024-11-11 15:25:09,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:25:09,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 15:25:09,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:25:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 15:25:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:25:09,262 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:25:09,278 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-11-11 15:25:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 15:25:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-11 15:25:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:25:09,279 INFO L225 Difference]: With dead ends: 32 [2024-11-11 15:25:09,279 INFO L226 Difference]: Without dead ends: 24 [2024-11-11 15:25:09,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:25:09,281 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:25:09,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:25:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-11 15:25:09,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-11 15:25:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-11 15:25:09,285 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2024-11-11 15:25:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:25:09,285 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-11 15:25:09,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-11 15:25:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-11 15:25:09,286 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:09,287 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:09,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-11 15:25:09,287 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:09,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1531242293, now seen corresponding path program 1 times [2024-11-11 15:25:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:09,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382877035] [2024-11-11 15:25:09,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 15:25:09,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:09,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382877035] [2024-11-11 15:25:09,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382877035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:25:09,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230645921] [2024-11-11 15:25:09,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:09,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:25:09,379 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:25:09,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 15:25:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:09,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-11 15:25:09,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:25:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 15:25:09,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:25:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 15:25:09,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230645921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:25:09,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:25:09,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-11 15:25:09,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286285282] [2024-11-11 15:25:09,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:25:09,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 15:25:09,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:25:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 15:25:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-11 15:25:09,620 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:25:09,691 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-11-11 15:25:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 15:25:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-11 15:25:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:25:09,693 INFO L225 Difference]: With dead ends: 52 [2024-11-11 15:25:09,693 INFO L226 Difference]: Without dead ends: 39 [2024-11-11 15:25:09,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-11 15:25:09,694 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:25:09,695 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:25:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-11 15:25:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-11-11 15:25:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2024-11-11 15:25:09,700 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2024-11-11 15:25:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:25:09,700 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2024-11-11 15:25:09,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2024-11-11 15:25:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-11 15:25:09,701 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:09,701 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:09,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 15:25:09,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:09,903 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:09,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1505418246, now seen corresponding path program 2 times [2024-11-11 15:25:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:09,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544408594] [2024-11-11 15:25:09,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:25:10,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:10,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544408594] [2024-11-11 15:25:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544408594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:25:10,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905590525] [2024-11-11 15:25:10,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:25:10,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:25:10,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:25:10,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 15:25:10,355 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:25:10,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:25:10,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-11 15:25:10,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:25:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:25:10,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:25:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:25:10,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905590525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:25:10,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:25:10,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-11 15:25:10,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669114720] [2024-11-11 15:25:10,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:25:10,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-11 15:25:10,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:25:10,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-11 15:25:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-11 15:25:10,692 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:25:10,789 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2024-11-11 15:25:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-11 15:25:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-11 15:25:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:25:10,791 INFO L225 Difference]: With dead ends: 77 [2024-11-11 15:25:10,791 INFO L226 Difference]: Without dead ends: 62 [2024-11-11 15:25:10,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-11 15:25:10,792 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:25:10,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 55 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:25:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-11 15:25:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-11 15:25:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2024-11-11 15:25:10,805 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 35 [2024-11-11 15:25:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:25:10,805 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2024-11-11 15:25:10,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2024-11-11 15:25:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-11 15:25:10,808 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:10,808 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:10,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 15:25:11,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:11,009 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:11,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1633133026, now seen corresponding path program 3 times [2024-11-11 15:25:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:11,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950671427] [2024-11-11 15:25:11,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:25:11,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:11,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950671427] [2024-11-11 15:25:11,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950671427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:25:11,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799569302] [2024-11-11 15:25:11,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:25:11,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:11,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:25:11,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:25:11,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 15:25:11,951 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 15:25:11,951 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:25:11,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-11 15:25:11,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:25:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-11 15:25:12,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:25:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-11 15:25:12,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799569302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:25:12,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:25:12,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2024-11-11 15:25:12,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653924090] [2024-11-11 15:25:12,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:25:12,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-11 15:25:12,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:25:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-11 15:25:12,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2024-11-11 15:25:12,085 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:25:12,185 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2024-11-11 15:25:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-11 15:25:12,186 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-11 15:25:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:25:12,188 INFO L225 Difference]: With dead ends: 88 [2024-11-11 15:25:12,188 INFO L226 Difference]: Without dead ends: 73 [2024-11-11 15:25:12,188 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2024-11-11 15:25:12,189 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:25:12,189 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:25:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-11 15:25:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-11-11 15:25:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-11-11 15:25:12,197 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 59 [2024-11-11 15:25:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:25:12,198 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-11-11 15:25:12,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-11-11 15:25:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-11 15:25:12,200 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:12,200 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:12,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 15:25:12,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:12,401 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:12,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash -449713396, now seen corresponding path program 4 times [2024-11-11 15:25:12,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:12,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42493258] [2024-11-11 15:25:12,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-11 15:25:13,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:13,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42493258] [2024-11-11 15:25:13,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42493258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:25:13,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422101213] [2024-11-11 15:25:13,162 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:25:13,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:13,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:25:13,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:25:13,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 15:25:13,328 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:25:13,328 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:25:13,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-11 15:25:13,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:25:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-11 15:25:13,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:25:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-11 15:25:14,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422101213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:25:14,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:25:14,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2024-11-11 15:25:14,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495420056] [2024-11-11 15:25:14,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:25:14,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-11 15:25:14,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:25:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-11 15:25:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-11-11 15:25:14,222 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:25:14,392 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2024-11-11 15:25:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-11 15:25:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-11 15:25:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:25:14,397 INFO L225 Difference]: With dead ends: 145 [2024-11-11 15:25:14,397 INFO L226 Difference]: Without dead ends: 122 [2024-11-11 15:25:14,399 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-11-11 15:25:14,399 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:25:14,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:25:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-11 15:25:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-11 15:25:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2024-11-11 15:25:14,447 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 69 [2024-11-11 15:25:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:25:14,448 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2024-11-11 15:25:14,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:25:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2024-11-11 15:25:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-11 15:25:14,452 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:25:14,454 INFO L218 NwaCegarLoop]: trace histogram [48, 48, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:25:14,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-11 15:25:14,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:14,655 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:25:14,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:25:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash -195914982, now seen corresponding path program 5 times [2024-11-11 15:25:14,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:25:14,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973531643] [2024-11-11 15:25:14,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:25:14,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:25:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:25:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-11 15:25:16,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:25:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973531643] [2024-11-11 15:25:16,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973531643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:25:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601686944] [2024-11-11 15:25:16,992 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 15:25:16,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:25:16,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:25:16,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:25:16,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process