./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.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 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 01:55:05,312 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 01:55:05,392 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 01:55:05,397 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 01:55:05,398 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 01:55:05,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 01:55:05,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 01:55:05,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 01:55:05,432 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 01:55:05,435 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 01:55:05,436 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 01:55:05,436 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 01:55:05,437 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 01:55:05,437 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 01:55:05,437 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 01:55:05,437 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 01:55:05,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 01:55:05,438 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 01:55:05,438 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 01:55:05,438 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 01:55:05,438 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 01:55:05,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 01:55:05,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 01:55:05,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 01:55:05,441 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 01:55:05,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 01:55:05,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 01:55:05,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 01:55:05,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 01:55:05,442 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 01:55:05,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 01:55:05,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 01:55:05,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:55:05,443 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 01:55:05,443 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 01:55:05,444 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 01:55:05,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 01:55:05,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 01:55:05,446 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 01:55:05,446 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 01:55:05,447 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 01:55:05,447 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 01:55:05,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 [2024-10-14 01:55:05,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 01:55:05,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 01:55:05,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 01:55:05,748 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 01:55:05,749 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 01:55:05,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2024-10-14 01:55:07,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 01:55:07,376 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 01:55:07,377 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2024-10-14 01:55:07,389 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efe31ddee/419d71897c62441083a7d9b13788ee79/FLAGdf9cb91d1 [2024-10-14 01:55:07,404 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efe31ddee/419d71897c62441083a7d9b13788ee79 [2024-10-14 01:55:07,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 01:55:07,409 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 01:55:07,413 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 01:55:07,414 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 01:55:07,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 01:55:07,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c4ec000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07, skipping insertion in model container [2024-10-14 01:55:07,422 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,467 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 01:55:07,744 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2024-10-14 01:55:07,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:55:07,758 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 01:55:07,804 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2024-10-14 01:55:07,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:55:07,833 INFO L204 MainTranslator]: Completed translation [2024-10-14 01:55:07,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07 WrapperNode [2024-10-14 01:55:07,834 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 01:55:07,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 01:55:07,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 01:55:07,835 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 01:55:07,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,854 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,872 INFO L138 Inliner]: procedures = 123, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 112 [2024-10-14 01:55:07,873 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 01:55:07,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 01:55:07,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 01:55:07,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 01:55:07,884 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,887 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,901 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-10-14 01:55:07,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,901 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,908 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,915 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,919 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,924 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,927 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 01:55:07,932 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 01:55:07,932 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 01:55:07,932 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 01:55:07,933 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (1/1) ... [2024-10-14 01:55:07,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:55:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:07,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 01:55:08,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 01:55:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 01:55:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 01:55:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 01:55:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 01:55:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 01:55:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 01:55:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 01:55:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-14 01:55:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 01:55:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-14 01:55:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 01:55:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 01:55:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 01:55:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 01:55:08,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 01:55:08,218 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 01:55:08,221 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 01:55:08,422 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-10-14 01:55:08,423 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 01:55:08,459 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 01:55:08,459 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 01:55:08,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:55:08 BoogieIcfgContainer [2024-10-14 01:55:08,460 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 01:55:08,461 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 01:55:08,461 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 01:55:08,464 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 01:55:08,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 01:55:07" (1/3) ... [2024-10-14 01:55:08,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbbeae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:55:08, skipping insertion in model container [2024-10-14 01:55:08,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:07" (2/3) ... [2024-10-14 01:55:08,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbbeae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:55:08, skipping insertion in model container [2024-10-14 01:55:08,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:55:08" (3/3) ... [2024-10-14 01:55:08,469 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2024-10-14 01:55:08,491 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 01:55:08,491 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 01:55:08,556 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 01:55:08,563 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;@2c23e16f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 01:55:08,564 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 01:55:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 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) [2024-10-14 01:55:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 01:55:08,574 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:08,574 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:08,575 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:08,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1329840781, now seen corresponding path program 1 times [2024-10-14 01:55:08,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184419888] [2024-10-14 01:55:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:08,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184419888] [2024-10-14 01:55:08,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184419888] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:55:08,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:55:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 01:55:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257027174] [2024-10-14 01:55:08,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:55:08,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 01:55:08,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:08,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 01:55:08,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:55:08,792 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-14 01:55:08,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:08,873 INFO L93 Difference]: Finished difference Result 45 states and 71 transitions. [2024-10-14 01:55:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 01:55:08,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2024-10-14 01:55:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:08,883 INFO L225 Difference]: With dead ends: 45 [2024-10-14 01:55:08,884 INFO L226 Difference]: Without dead ends: 23 [2024-10-14 01:55:08,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:55:08,891 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:08,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-14 01:55:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-10-14 01:55:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2024-10-14 01:55:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2024-10-14 01:55:08,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 10 [2024-10-14 01:55:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:08,922 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2024-10-14 01:55:08,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-14 01:55:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2024-10-14 01:55:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 01:55:08,922 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:08,923 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:08,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 01:55:08,923 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:08,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1023865075, now seen corresponding path program 1 times [2024-10-14 01:55:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:08,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621670444] [2024-10-14 01:55:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:08,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:09,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:09,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621670444] [2024-10-14 01:55:09,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621670444] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:55:09,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:55:09,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 01:55:09,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141003575] [2024-10-14 01:55:09,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:55:09,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 01:55:09,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 01:55:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:55:09,145 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:55:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:09,210 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2024-10-14 01:55:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 01:55:09,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-14 01:55:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:09,211 INFO L225 Difference]: With dead ends: 40 [2024-10-14 01:55:09,211 INFO L226 Difference]: Without dead ends: 22 [2024-10-14 01:55:09,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:55:09,212 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:09,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-14 01:55:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-14 01:55:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2024-10-14 01:55:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-10-14 01:55:09,218 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 14 [2024-10-14 01:55:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:09,219 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-10-14 01:55:09,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:55:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-10-14 01:55:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 01:55:09,220 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:09,220 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:09,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 01:55:09,221 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:09,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:09,221 INFO L85 PathProgramCache]: Analyzing trace with hash -322800497, now seen corresponding path program 1 times [2024-10-14 01:55:09,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:09,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568657845] [2024-10-14 01:55:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:09,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:09,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568657845] [2024-10-14 01:55:09,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568657845] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:09,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590789574] [2024-10-14 01:55:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:09,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:09,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:09,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 01:55:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:09,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 01:55:09,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:09,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:09,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590789574] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:09,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:09,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-14 01:55:09,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248618504] [2024-10-14 01:55:09,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:09,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 01:55:09,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 01:55:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 01:55:09,566 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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) [2024-10-14 01:55:09,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:09,646 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2024-10-14 01:55:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 01:55:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 14 [2024-10-14 01:55:09,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:09,648 INFO L225 Difference]: With dead ends: 46 [2024-10-14 01:55:09,648 INFO L226 Difference]: Without dead ends: 32 [2024-10-14 01:55:09,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 01:55:09,650 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:09,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-14 01:55:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-14 01:55:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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) [2024-10-14 01:55:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-10-14 01:55:09,655 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 14 [2024-10-14 01:55:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:09,656 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-10-14 01:55:09,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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) [2024-10-14 01:55:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-10-14 01:55:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 01:55:09,657 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:09,657 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:09,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 01:55:09,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:09,862 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:09,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:09,863 INFO L85 PathProgramCache]: Analyzing trace with hash 874424079, now seen corresponding path program 1 times [2024-10-14 01:55:09,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:09,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566078017] [2024-10-14 01:55:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:09,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:10,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:10,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566078017] [2024-10-14 01:55:10,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566078017] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:10,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380588644] [2024-10-14 01:55:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:10,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:10,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:10,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:10,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 01:55:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:10,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 01:55:10,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:10,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:10,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380588644] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:10,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:10,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-10-14 01:55:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351188091] [2024-10-14 01:55:10,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:10,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 01:55:10,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 01:55:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 01:55:10,482 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2024-10-14 01:55:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:10,597 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2024-10-14 01:55:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 01:55:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) Word has length 26 [2024-10-14 01:55:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:10,599 INFO L225 Difference]: With dead ends: 50 [2024-10-14 01:55:10,599 INFO L226 Difference]: Without dead ends: 36 [2024-10-14 01:55:10,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 01:55:10,602 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:10,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-14 01:55:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-14 01:55:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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) [2024-10-14 01:55:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-10-14 01:55:10,608 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 26 [2024-10-14 01:55:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:10,609 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-10-14 01:55:10,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2024-10-14 01:55:10,609 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-10-14 01:55:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 01:55:10,610 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:10,610 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:10,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 01:55:10,814 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,SelfDestructingSolverStorable3 [2024-10-14 01:55:10,815 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:10,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1055515279, now seen corresponding path program 2 times [2024-10-14 01:55:10,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:10,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467065520] [2024-10-14 01:55:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:10,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 01:55:11,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:11,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467065520] [2024-10-14 01:55:11,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467065520] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:11,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350503400] [2024-10-14 01:55:11,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 01:55:11,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:11,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:11,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:11,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 01:55:11,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 01:55:11,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:11,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 01:55:11,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:11,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:55:11,847 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 01:55:11,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 01:55:11,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 69 [2024-10-14 01:55:11,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 104 [2024-10-14 01:55:11,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:55:11,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 143 [2024-10-14 01:55:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 01:55:12,021 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 01:55:12,024 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 01:55:12,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 26 [2024-10-14 01:55:12,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 47 [2024-10-14 01:55:12,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:55:12,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 35 [2024-10-14 01:55:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 01:55:12,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:12,347 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_662 (Array Int Int))) (= (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_662) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) 0)) is different from false [2024-10-14 01:55:12,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2024-10-14 01:55:12,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:55:12,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 54 treesize of output 115 [2024-10-14 01:55:12,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-10-14 01:55:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 1 not checked. [2024-10-14 01:55:12,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350503400] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:12,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:12,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-10-14 01:55:12,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234165519] [2024-10-14 01:55:12,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:12,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 01:55:12,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:12,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 01:55:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2024-10-14 01:55:12,497 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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) [2024-10-14 01:55:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:12,894 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2024-10-14 01:55:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 01:55:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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 30 [2024-10-14 01:55:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:12,895 INFO L225 Difference]: With dead ends: 62 [2024-10-14 01:55:12,895 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 01:55:12,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=338, Unknown=1, NotChecked=38, Total=462 [2024-10-14 01:55:12,897 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:12,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 136 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 197 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2024-10-14 01:55:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 01:55:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2024-10-14 01:55:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 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) [2024-10-14 01:55:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-10-14 01:55:12,904 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 30 [2024-10-14 01:55:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:12,904 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-10-14 01:55:12,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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) [2024-10-14 01:55:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-10-14 01:55:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 01:55:12,905 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:12,905 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:12,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 01:55:13,108 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 [2024-10-14 01:55:13,109 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:13,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1057362321, now seen corresponding path program 1 times [2024-10-14 01:55:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:13,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434499563] [2024-10-14 01:55:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:13,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 01:55:13,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:13,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434499563] [2024-10-14 01:55:13,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434499563] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:13,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692357067] [2024-10-14 01:55:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:13,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:13,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:13,961 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:13,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 01:55:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:14,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 01:55:14,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:14,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:55:14,237 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 01:55:14,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 01:55:14,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 71 [2024-10-14 01:55:14,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 112 [2024-10-14 01:55:14,341 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:55:14,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 143 [2024-10-14 01:55:14,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:55:14,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 53 [2024-10-14 01:55:14,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 47 [2024-10-14 01:55:14,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:55:14,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 35 [2024-10-14 01:55:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 01:55:14,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:14,699 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_985 (Array Int Int))) (= (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_985) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) 0)) is different from false [2024-10-14 01:55:14,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2024-10-14 01:55:14,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:55:14,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 123 [2024-10-14 01:55:14,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:55:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 1 not checked. [2024-10-14 01:55:14,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692357067] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:14,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:14,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2024-10-14 01:55:14,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95397099] [2024-10-14 01:55:14,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:14,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 01:55:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:14,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 01:55:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2024-10-14 01:55:14,817 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 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) [2024-10-14 01:55:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:15,270 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2024-10-14 01:55:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 01:55:15,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 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 30 [2024-10-14 01:55:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:15,271 INFO L225 Difference]: With dead ends: 62 [2024-10-14 01:55:15,272 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 01:55:15,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=736, Unknown=1, NotChecked=56, Total=930 [2024-10-14 01:55:15,273 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:15,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 150 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 214 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2024-10-14 01:55:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 01:55:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2024-10-14 01:55:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 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) [2024-10-14 01:55:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-10-14 01:55:15,279 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 30 [2024-10-14 01:55:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:15,280 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-10-14 01:55:15,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 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) [2024-10-14 01:55:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-10-14 01:55:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 01:55:15,281 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:15,281 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:15,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 01:55:15,481 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 [2024-10-14 01:55:15,482 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:15,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:15,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1057364243, now seen corresponding path program 1 times [2024-10-14 01:55:15,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:15,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773042588] [2024-10-14 01:55:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:15,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 01:55:15,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 01:55:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 01:55:15,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 01:55:15,649 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 01:55:15,650 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-14 01:55:15,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 01:55:15,655 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2024-10-14 01:55:15,683 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-14 01:55:15,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 01:55:15 BoogieIcfgContainer [2024-10-14 01:55:15,686 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-14 01:55:15,686 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-14 01:55:15,686 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-14 01:55:15,687 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-14 01:55:15,687 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:55:08" (3/4) ... [2024-10-14 01:55:15,688 INFO L133 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-14 01:55:15,734 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-14 01:55:15,735 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-14 01:55:15,735 INFO L158 Benchmark]: Toolchain (without parser) took 8326.02ms. Allocated memory was 172.0MB in the beginning and 262.1MB in the end (delta: 90.2MB). Free memory was 102.9MB in the beginning and 166.6MB in the end (delta: -63.7MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2024-10-14 01:55:15,735 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 119.5MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 01:55:15,735 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.97ms. Allocated memory is still 172.0MB. Free memory was 102.9MB in the beginning and 84.3MB in the end (delta: 18.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-10-14 01:55:15,736 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.81ms. Allocated memory is still 172.0MB. Free memory was 84.3MB in the beginning and 82.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 01:55:15,736 INFO L158 Benchmark]: Boogie Preprocessor took 57.73ms. Allocated memory is still 172.0MB. Free memory was 82.0MB in the beginning and 79.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 01:55:15,736 INFO L158 Benchmark]: RCFGBuilder took 527.98ms. Allocated memory is still 172.0MB. Free memory was 79.7MB in the beginning and 126.6MB in the end (delta: -46.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-14 01:55:15,736 INFO L158 Benchmark]: TraceAbstraction took 7224.52ms. Allocated memory was 172.0MB in the beginning and 262.1MB in the end (delta: 90.2MB). Free memory was 125.6MB in the beginning and 169.7MB in the end (delta: -44.1MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. [2024-10-14 01:55:15,737 INFO L158 Benchmark]: Witness Printer took 48.43ms. Allocated memory is still 262.1MB. Free memory was 169.7MB in the beginning and 166.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 01:55:15,738 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 119.5MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.97ms. Allocated memory is still 172.0MB. Free memory was 102.9MB in the beginning and 84.3MB in the end (delta: 18.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.81ms. Allocated memory is still 172.0MB. Free memory was 84.3MB in the beginning and 82.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.73ms. Allocated memory is still 172.0MB. Free memory was 82.0MB in the beginning and 79.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 527.98ms. Allocated memory is still 172.0MB. Free memory was 79.7MB in the beginning and 126.6MB in the end (delta: -46.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 7224.52ms. Allocated memory was 172.0MB in the beginning and 262.1MB in the end (delta: 90.2MB). Free memory was 125.6MB in the beginning and 169.7MB in the end (delta: -44.1MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. * Witness Printer took 48.43ms. Allocated memory is still 262.1MB. Free memory was 169.7MB in the beginning and 166.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L599] const int len = 5; [L600] CALL, EXPR dll_create(len) [L579] DLL head = ((void *)0); VAL [head={0:0}, len=5] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) VAL [head={-5:0}] [L596] return head; [L600] RET, EXPR dll_create(len) [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [head={-5:0}] [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [head={-5:0}] [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [head={-5:0}] [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [head={-5:0}] [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() VAL [head={-5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 93 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 93 mSDsluCounter, 515 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 67 IncrementalHoareTripleChecker+Unchecked, 398 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 473 IncrementalHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 117 mSDtfsCounter, 473 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 178 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=6, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 254 NumberOfCodeBlocks, 254 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 310 ConstructedInterpolants, 2 QuantifiedInterpolants, 1504 SizeOfPredicates, 14 NumberOfNonLiveVariables, 1406 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 238/358 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-10-14 01:55:15,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE