./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/nec20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/nec20.c -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 f0c1b7bb29025bb3cfe44532e03db36f6e9424224df9a32b2b480eba846c2cfe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 06:41:25,286 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 06:41:25,338 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 06:41:25,345 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 06:41:25,346 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 06:41:25,364 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 06:41:25,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 06:41:25,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 06:41:25,365 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 06:41:25,366 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 06:41:25,367 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 06:41:25,367 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 06:41:25,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 06:41:25,369 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 06:41:25,369 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 06:41:25,369 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 06:41:25,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 06:41:25,370 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 06:41:25,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 06:41:25,372 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 06:41:25,373 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 06:41:25,373 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 06:41:25,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 06:41:25,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 06:41:25,373 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 06:41:25,374 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 06:41:25,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 06:41:25,374 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 06:41:25,374 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 06:41:25,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 06:41:25,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 06:41:25,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 06:41:25,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:41:25,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 06:41:25,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 06:41:25,375 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 06:41:25,375 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 06:41:25,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 06:41:25,376 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 06:41:25,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 06:41:25,376 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 06:41:25,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 06:41:25,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0c1b7bb29025bb3cfe44532e03db36f6e9424224df9a32b2b480eba846c2cfe [2024-11-16 06:41:25,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 06:41:25,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 06:41:25,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 06:41:25,607 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 06:41:25,607 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 06:41:25,608 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec20.c [2024-11-16 06:41:26,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 06:41:27,004 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 06:41:27,004 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec20.c [2024-11-16 06:41:27,009 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22a85f14/2de72e36e1fc4c4387b077e485e5d7cb/FLAGa155b5bd7 [2024-11-16 06:41:27,019 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22a85f14/2de72e36e1fc4c4387b077e485e5d7cb [2024-11-16 06:41:27,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 06:41:27,023 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 06:41:27,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 06:41:27,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 06:41:27,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 06:41:27,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af861a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27, skipping insertion in model container [2024-11-16 06:41:27,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,047 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 06:41:27,164 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec20.c[356,369] [2024-11-16 06:41:27,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:41:27,183 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 06:41:27,192 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec20.c[356,369] [2024-11-16 06:41:27,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:41:27,207 INFO L204 MainTranslator]: Completed translation [2024-11-16 06:41:27,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27 WrapperNode [2024-11-16 06:41:27,209 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 06:41:27,210 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 06:41:27,210 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 06:41:27,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 06:41:27,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,220 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,232 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-16 06:41:27,232 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 06:41:27,232 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 06:41:27,233 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 06:41:27,233 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 06:41:27,241 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,244 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,253 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-16 06:41:27,253 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,253 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,257 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,258 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,260 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 06:41:27,261 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 06:41:27,261 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 06:41:27,261 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 06:41:27,262 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (1/1) ... [2024-11-16 06:41:27,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:41:27,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:41:27,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 06:41:27,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 06:41:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 06:41:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 06:41:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 06:41:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 06:41:27,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 06:41:27,374 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 06:41:27,375 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 06:41:27,505 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-16 06:41:27,505 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 06:41:27,518 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 06:41:27,518 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 06:41:27,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:41:27 BoogieIcfgContainer [2024-11-16 06:41:27,518 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 06:41:27,522 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 06:41:27,523 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 06:41:27,525 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 06:41:27,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 06:41:27" (1/3) ... [2024-11-16 06:41:27,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e301124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:41:27, skipping insertion in model container [2024-11-16 06:41:27,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:41:27" (2/3) ... [2024-11-16 06:41:27,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e301124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:41:27, skipping insertion in model container [2024-11-16 06:41:27,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:41:27" (3/3) ... [2024-11-16 06:41:27,527 INFO L112 eAbstractionObserver]: Analyzing ICFG nec20.c [2024-11-16 06:41:27,539 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 06:41:27,539 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 06:41:27,578 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 06:41:27,583 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;@cda9d22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 06:41:27,583 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 06:41:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 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) [2024-11-16 06:41:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-16 06:41:27,590 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:27,591 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:27,591 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:27,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash 201252473, now seen corresponding path program 1 times [2024-11-16 06:41:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:27,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514945447] [2024-11-16 06:41:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:41:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514945447] [2024-11-16 06:41:27,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514945447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:41:27,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:41:27,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 06:41:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878722728] [2024-11-16 06:41:27,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:41:27,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 06:41:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 06:41:27,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:41:27,796 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 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) Second operand has 2 states, 2 states have (on average 5.0) 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) [2024-11-16 06:41:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:27,807 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-16 06:41:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 06:41:27,809 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) 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 [2024-11-16 06:41:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:27,814 INFO L225 Difference]: With dead ends: 30 [2024-11-16 06:41:27,814 INFO L226 Difference]: Without dead ends: 12 [2024-11-16 06:41:27,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:41:27,820 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:27,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:41:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-16 06:41:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-16 06:41:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-11-16 06:41:27,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2024-11-16 06:41:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:27,844 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-11-16 06:41:27,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) 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) [2024-11-16 06:41:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-11-16 06:41:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 06:41:27,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:27,845 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:27,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 06:41:27,846 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:27,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1917137841, now seen corresponding path program 1 times [2024-11-16 06:41:27,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:27,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979668581] [2024-11-16 06:41:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:27,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:41:28,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:28,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979668581] [2024-11-16 06:41:28,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979668581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:41:28,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:41:28,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 06:41:28,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627002193] [2024-11-16 06:41:28,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:41:28,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 06:41:28,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 06:41:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 06:41:28,041 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:28,064 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2024-11-16 06:41:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 06:41:28,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-16 06:41:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:28,065 INFO L225 Difference]: With dead ends: 23 [2024-11-16 06:41:28,065 INFO L226 Difference]: Without dead ends: 18 [2024-11-16 06:41:28,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 06:41:28,066 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:28,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:41:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-16 06:41:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-11-16 06:41:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-11-16 06:41:28,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2024-11-16 06:41:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:28,072 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-11-16 06:41:28,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-11-16 06:41:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 06:41:28,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:28,073 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:28,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 06:41:28,074 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:28,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:28,074 INFO L85 PathProgramCache]: Analyzing trace with hash 109683378, now seen corresponding path program 1 times [2024-11-16 06:41:28,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:28,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425674998] [2024-11-16 06:41:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:28,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:41:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425674998] [2024-11-16 06:41:28,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425674998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:41:28,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:41:28,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 06:41:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280126754] [2024-11-16 06:41:28,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:41:28,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 06:41:28,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 06:41:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 06:41:28,233 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:28,265 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-11-16 06:41:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 06:41:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-16 06:41:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:28,267 INFO L225 Difference]: With dead ends: 25 [2024-11-16 06:41:28,267 INFO L226 Difference]: Without dead ends: 20 [2024-11-16 06:41:28,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 06:41:28,269 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:28,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:41:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-16 06:41:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2024-11-16 06:41:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2024-11-16 06:41:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-16 06:41:28,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2024-11-16 06:41:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:28,279 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-16 06:41:28,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-16 06:41:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-16 06:41:28,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:28,280 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:28,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 06:41:28,280 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:28,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1750434032, now seen corresponding path program 1 times [2024-11-16 06:41:28,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:28,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481926613] [2024-11-16 06:41:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:28,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 06:41:28,306 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 06:41:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 06:41:28,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 06:41:28,332 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 06:41:28,333 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-16 06:41:28,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 06:41:28,337 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-16 06:41:28,354 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-16 06:41:28,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 06:41:28 BoogieIcfgContainer [2024-11-16 06:41:28,359 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-16 06:41:28,360 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-16 06:41:28,360 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-16 06:41:28,360 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-16 06:41:28,361 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:41:27" (3/4) ... [2024-11-16 06:41:28,361 INFO L137 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-16 06:41:28,392 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-16 06:41:28,394 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-16 06:41:28,394 INFO L158 Benchmark]: Toolchain (without parser) took 1371.58ms. Allocated memory was 146.8MB in the beginning and 186.6MB in the end (delta: 39.8MB). Free memory was 91.1MB in the beginning and 110.8MB in the end (delta: -19.7MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. [2024-11-16 06:41:28,394 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 146.8MB. Free memory is still 118.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 06:41:28,396 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.29ms. Allocated memory is still 146.8MB. Free memory was 90.9MB in the beginning and 78.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-16 06:41:28,396 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.75ms. Allocated memory is still 146.8MB. Free memory was 78.3MB in the beginning and 76.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 06:41:28,396 INFO L158 Benchmark]: Boogie Preprocessor took 28.14ms. Allocated memory is still 146.8MB. Free memory was 76.9MB in the beginning and 75.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 06:41:28,396 INFO L158 Benchmark]: IcfgBuilder took 257.14ms. Allocated memory is still 146.8MB. Free memory was 75.2MB in the beginning and 63.9MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-16 06:41:28,397 INFO L158 Benchmark]: TraceAbstraction took 837.14ms. Allocated memory was 146.8MB in the beginning and 186.6MB in the end (delta: 39.8MB). Free memory was 63.3MB in the beginning and 112.9MB in the end (delta: -49.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 06:41:28,397 INFO L158 Benchmark]: Witness Printer took 33.84ms. Allocated memory is still 186.6MB. Free memory was 112.9MB in the beginning and 110.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 06:41:28,398 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 146.8MB. Free memory is still 118.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 186.29ms. Allocated memory is still 146.8MB. Free memory was 90.9MB in the beginning and 78.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.75ms. Allocated memory is still 146.8MB. Free memory was 78.3MB in the beginning and 76.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.14ms. Allocated memory is still 146.8MB. Free memory was 76.9MB in the beginning and 75.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 257.14ms. Allocated memory is still 146.8MB. Free memory was 75.2MB in the beginning and 63.9MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 837.14ms. Allocated memory was 146.8MB in the beginning and 186.6MB in the end (delta: 39.8MB). Free memory was 63.3MB in the beginning and 112.9MB in the end (delta: -49.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 33.84ms. Allocated memory is still 186.6MB. Free memory was 112.9MB in the beginning and 110.8MB in the end (delta: 2.1MB). 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: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int b; VAL [b=0] [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; VAL [b=0, k=1] [L19] COND TRUE \read(k) [L20] n=0 VAL [b=0, n=0] [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) VAL [b=0, i=0, j=-4294966273, n=0] [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 VAL [b=0, i=1, j=-4294966271, n=0] [L30] COND FALSE !(i <= n) VAL [b=0, i=1, j=-4294966271] [L35] a[i]=0 [L36] CALL __VERIFIER_assert(j<1025) [L7] COND TRUE !(cond) VAL [b=0] [L8] reach_error() VAL [b=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25 IncrementalHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 49 mSDtfsCounter, 25 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 10, 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, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 84 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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! [2024-11-16 06:41:28,421 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE