./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/string-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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/loops/string-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 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:29:40,634 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:29:40,682 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:29:40,686 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:29:40,687 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:29:40,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:29:40,732 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:29:40,732 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:29:40,733 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:29:40,733 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:29:40,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:29:40,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:29:40,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:29:40,750 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:29:40,752 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:29:40,752 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:29:40,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:29:40,753 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:29:40,753 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:29:40,753 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:29:40,754 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:29:40,757 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:29:40,758 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:29:40,758 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:29:40,758 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:29:40,758 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:29:40,759 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:29:40,759 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:29:40,759 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:29:40,759 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:29:40,759 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:29:40,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:29:40,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:29:40,760 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:29:40,760 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:29:40,760 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:29:40,760 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:29:40,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:29:40,761 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:29:40,761 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:29:40,761 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:29:40,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:29:40,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de [2024-10-12 18:29:40,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:29:40,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:29:41,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:29:41,004 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:29:41,004 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:29:41,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/string-1.i [2024-10-12 18:29:42,636 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:29:42,900 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:29:42,900 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/string-1.i [2024-10-12 18:29:42,907 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ac504fd/67166e3c835846129bc75904392f97ba/FLAGf2798a441 [2024-10-12 18:29:42,930 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ac504fd/67166e3c835846129bc75904392f97ba [2024-10-12 18:29:42,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:29:42,935 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:29:42,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:29:42,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:29:42,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:29:42,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:29:42" (1/1) ... [2024-10-12 18:29:42,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dff8899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:42, skipping insertion in model container [2024-10-12 18:29:42,947 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:29:42" (1/1) ... [2024-10-12 18:29:42,972 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:29:43,155 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/loops/string-1.i[896,909] [2024-10-12 18:29:43,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:29:43,185 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:29:43,198 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/loops/string-1.i[896,909] [2024-10-12 18:29:43,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:29:43,230 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:29:43,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43 WrapperNode [2024-10-12 18:29:43,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:29:43,232 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:29:43,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:29:43,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:29:43,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,273 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 123 [2024-10-12 18:29:43,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:29:43,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:29:43,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:29:43,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:29:43,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,289 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,303 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-12 18:29:43,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,321 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,323 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,326 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:29:43,327 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:29:43,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:29:43,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:29:43,329 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (1/1) ... [2024-10-12 18:29:43,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:29:43,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:29:43,367 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) [2024-10-12 18:29:43,370 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 [2024-10-12 18:29:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:29:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:29:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 18:29:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 18:29:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 18:29:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 18:29:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 18:29:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 18:29:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:29:43,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:29:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 18:29:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 18:29:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 18:29:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 18:29:43,498 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:29:43,503 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:29:43,667 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-10-12 18:29:43,668 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:29:43,697 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:29:43,697 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-12 18:29:43,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:29:43 BoogieIcfgContainer [2024-10-12 18:29:43,698 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:29:43,703 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:29:43,704 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:29:43,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:29:43,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:29:42" (1/3) ... [2024-10-12 18:29:43,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13038a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:29:43, skipping insertion in model container [2024-10-12 18:29:43,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:29:43" (2/3) ... [2024-10-12 18:29:43,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13038a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:29:43, skipping insertion in model container [2024-10-12 18:29:43,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:29:43" (3/3) ... [2024-10-12 18:29:43,714 INFO L112 eAbstractionObserver]: Analyzing ICFG string-1.i [2024-10-12 18:29:43,732 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:29:43,732 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:29:43,791 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:29:43,798 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;@e7a6555, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:29:43,799 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:29:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 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) [2024-10-12 18:29:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-12 18:29:43,810 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:29:43,811 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:29:43,811 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:29:43,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:29:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash 677504398, now seen corresponding path program 1 times [2024-10-12 18:29:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:29:43,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011141446] [2024-10-12 18:29:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:29:43,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:29:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:29:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:29:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:29:44,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011141446] [2024-10-12 18:29:44,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011141446] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:29:44,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:29:44,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:29:44,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723527967] [2024-10-12 18:29:44,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:29:44,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:29:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:29:44,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:29:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:29:44,104 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2024-10-12 18:29:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:29:44,150 INFO L93 Difference]: Finished difference Result 46 states and 79 transitions. [2024-10-12 18:29:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:29:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2024-10-12 18:29:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:29:44,171 INFO L225 Difference]: With dead ends: 46 [2024-10-12 18:29:44,171 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 18:29:44,175 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 [2024-10-12 18:29:44,179 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:29:44,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:29:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 18:29:44,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2024-10-12 18:29:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2024-10-12 18:29:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-10-12 18:29:44,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2024-10-12 18:29:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:29:44,249 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-10-12 18:29:44,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2024-10-12 18:29:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-10-12 18:29:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 18:29:44,251 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:29:44,251 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:29:44,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:29:44,252 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:29:44,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:29:44,253 INFO L85 PathProgramCache]: Analyzing trace with hash -933915459, now seen corresponding path program 1 times [2024-10-12 18:29:44,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:29:44,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119049685] [2024-10-12 18:29:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:29:44,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:29:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:29:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:29:44,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:29:44,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119049685] [2024-10-12 18:29:44,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119049685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:29:44,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512968985] [2024-10-12 18:29:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:29:44,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:29:44,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:29:44,412 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) [2024-10-12 18:29:44,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:29:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:29:44,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 18:29:44,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:29:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:29:44,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:29:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:29:44,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512968985] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:29:44,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:29:44,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-12 18:29:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228896872] [2024-10-12 18:29:44,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:29:44,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 18:29:44,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:29:44,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 18:29:44,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:29:44,552 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2024-10-12 18:29:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:29:44,633 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-10-12 18:29:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:29:44,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-12 18:29:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:29:44,635 INFO L225 Difference]: With dead ends: 53 [2024-10-12 18:29:44,635 INFO L226 Difference]: Without dead ends: 35 [2024-10-12 18:29:44,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:29:44,636 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:29:44,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:29:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-12 18:29:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2024-10-12 18:29:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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) [2024-10-12 18:29:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-10-12 18:29:44,646 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2024-10-12 18:29:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:29:44,646 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-10-12 18:29:44,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2024-10-12 18:29:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-10-12 18:29:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 18:29:44,649 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:29:44,650 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:29:44,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 18:29:44,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:29:44,851 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:29:44,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:29:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1614794180, now seen corresponding path program 2 times [2024-10-12 18:29:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:29:44,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790238964] [2024-10-12 18:29:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:29:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:29:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:29:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 18:29:45,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:29:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790238964] [2024-10-12 18:29:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790238964] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:29:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161148306] [2024-10-12 18:29:45,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:29:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:29:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:29:45,023 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) [2024-10-12 18:29:45,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:29:45,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-12 18:29:45,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:29:45,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:29:45,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:29:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-12 18:29:45,194 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:29:45,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161148306] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:29:45,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:29:45,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-10-12 18:29:45,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566986039] [2024-10-12 18:29:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:29:45,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:29:45,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:29:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:29:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:29:45,196 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-10-12 18:29:45,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:29:45,235 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-10-12 18:29:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:29:45,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 25 [2024-10-12 18:29:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:29:45,236 INFO L225 Difference]: With dead ends: 36 [2024-10-12 18:29:45,236 INFO L226 Difference]: Without dead ends: 0 [2024-10-12 18:29:45,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:29:45,238 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:29:45,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:29:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-12 18:29:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-12 18:29:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2024-10-12 18:29:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-12 18:29:45,239 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2024-10-12 18:29:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:29:45,240 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-12 18:29:45,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-10-12 18:29:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-12 18:29:45,240 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-12 18:29:45,243 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-12 18:29:45,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 18:29:45,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-12 18:29:45,455 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1] [2024-10-12 18:29:45,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-12 18:29:45,471 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-12 18:29:45,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 06:29:45 BoogieIcfgContainer [2024-10-12 18:29:45,482 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-12 18:29:45,482 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-12 18:29:45,482 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-12 18:29:45,483 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-12 18:29:45,483 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:29:43" (3/4) ... [2024-10-12 18:29:45,485 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-12 18:29:45,495 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2024-10-12 18:29:45,496 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-10-12 18:29:45,496 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-12 18:29:45,496 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-12 18:29:45,583 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-12 18:29:45,584 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-12 18:29:45,584 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-12 18:29:45,584 INFO L158 Benchmark]: Toolchain (without parser) took 2649.28ms. Allocated memory is still 207.6MB. Free memory was 140.4MB in the beginning and 105.7MB in the end (delta: 34.7MB). Peak memory consumption was 33.3MB. Max. memory is 16.1GB. [2024-10-12 18:29:45,585 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 76.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-12 18:29:45,585 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.69ms. Allocated memory is still 207.6MB. Free memory was 140.4MB in the beginning and 127.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-12 18:29:45,585 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.69ms. Allocated memory is still 207.6MB. Free memory was 127.5MB in the beginning and 126.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-12 18:29:45,585 INFO L158 Benchmark]: Boogie Preprocessor took 51.92ms. Allocated memory is still 207.6MB. Free memory was 126.1MB in the beginning and 123.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-12 18:29:45,585 INFO L158 Benchmark]: RCFGBuilder took 370.42ms. Allocated memory is still 207.6MB. Free memory was 123.6MB in the beginning and 107.9MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-12 18:29:45,585 INFO L158 Benchmark]: TraceAbstraction took 1778.49ms. Allocated memory is still 207.6MB. Free memory was 107.2MB in the beginning and 109.8MB in the end (delta: -2.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-12 18:29:45,586 INFO L158 Benchmark]: Witness Printer took 101.60ms. Allocated memory is still 207.6MB. Free memory was 109.8MB in the beginning and 105.7MB in the end (delta: 4.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-12 18:29:45,587 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 109.1MB. Free memory is still 76.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.69ms. Allocated memory is still 207.6MB. Free memory was 140.4MB in the beginning and 127.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.69ms. Allocated memory is still 207.6MB. Free memory was 127.5MB in the beginning and 126.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.92ms. Allocated memory is still 207.6MB. Free memory was 126.1MB in the beginning and 123.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 370.42ms. Allocated memory is still 207.6MB. Free memory was 123.6MB in the beginning and 107.9MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 1778.49ms. Allocated memory is still 207.6MB. Free memory was 107.2MB in the beginning and 109.8MB in the end (delta: -2.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 101.60ms. Allocated memory is still 207.6MB. Free memory was 109.8MB in the beginning and 105.7MB in the end (delta: 4.2MB). Peak memory consumption was 6.3MB. 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 - PositiveResult [Line: 20]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 146 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 93 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 91 IncrementalHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 53 mSDtfsCounter, 91 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 103 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 0 NumberOfNonLiveVariables, 178 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 33/46 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2024-10-12 18:29:45,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE