./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 c187a61b21cc0091fb22a1c4e23554540f928674895dd149d9c60db42e5420c7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 17:55:36,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 17:55:36,621 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 17:55:36,627 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 17:55:36,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 17:55:36,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 17:55:36,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 17:55:36,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 17:55:36,665 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 17:55:36,666 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 17:55:36,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 17:55:36,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 17:55:36,669 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 17:55:36,669 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 17:55:36,670 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 17:55:36,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 17:55:36,670 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 17:55:36,671 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 17:55:36,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 17:55:36,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 17:55:36,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 17:55:36,672 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 17:55:36,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 17:55:36,673 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 17:55:36,676 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 17:55:36,676 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 17:55:36,677 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 17:55:36,677 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 17:55:36,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 17:55:36,677 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 17:55:36,678 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 17:55:36,678 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 17:55:36,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 17:55:36,678 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 17:55:36,679 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 17:55:36,679 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 17:55:36,679 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 17:55:36,679 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 17:55:36,679 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 17:55:36,680 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 17:55:36,680 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 17:55:36,681 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 17:55:36,682 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c187a61b21cc0091fb22a1c4e23554540f928674895dd149d9c60db42e5420c7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2024-09-12 17:55:36,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 17:55:37,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 17:55:37,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 17:55:37,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 17:55:37,026 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 17:55:37,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2024-09-12 17:55:38,542 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 17:55:38,723 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 17:55:38,724 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2024-09-12 17:55:38,732 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9cdcdd690/4807e18d6c724895868ad08b67eb1e9d/FLAG5eba2da3e [2024-09-12 17:55:39,105 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9cdcdd690/4807e18d6c724895868ad08b67eb1e9d [2024-09-12 17:55:39,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 17:55:39,108 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 17:55:39,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 17:55:39,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 17:55:39,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 17:55:39,115 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,116 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d48d97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39, skipping insertion in model container [2024-09-12 17:55:39,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,134 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 17:55:39,290 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c[327,340] [2024-09-12 17:55:39,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 17:55:39,320 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 17:55:39,330 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c[327,340] [2024-09-12 17:55:39,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 17:55:39,350 INFO L204 MainTranslator]: Completed translation [2024-09-12 17:55:39,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39 WrapperNode [2024-09-12 17:55:39,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 17:55:39,356 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 17:55:39,356 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 17:55:39,356 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 17:55:39,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,379 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 17:55:39,379 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 17:55:39,381 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 17:55:39,381 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 17:55:39,381 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 17:55:39,390 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,403 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 17:55:39,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,403 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,417 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,426 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,427 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,429 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 17:55:39,430 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 17:55:39,430 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 17:55:39,431 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 17:55:39,432 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (1/1) ... [2024-09-12 17:55:39,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 17:55:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:55:39,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 17:55:39,469 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 17:55:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 17:55:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 17:55:39,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 17:55:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 17:55:39,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 17:55:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 17:55:39,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 17:55:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 17:55:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 17:55:39,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 17:55:39,580 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 17:55:39,583 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 17:55:39,710 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-09-12 17:55:39,711 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 17:55:39,733 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 17:55:39,734 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 17:55:39,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 05:55:39 BoogieIcfgContainer [2024-09-12 17:55:39,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 17:55:39,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 17:55:39,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 17:55:39,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 17:55:39,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 05:55:39" (1/3) ... [2024-09-12 17:55:39,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39257f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 05:55:39, skipping insertion in model container [2024-09-12 17:55:39,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 05:55:39" (2/3) ... [2024-09-12 17:55:39,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39257f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 05:55:39, skipping insertion in model container [2024-09-12 17:55:39,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 05:55:39" (3/3) ... [2024-09-12 17:55:39,745 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2024-09-12 17:55:39,765 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 17:55:39,766 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 17:55:39,820 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 17:55:39,826 INFO L336 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=All, 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;@59f07d3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 17:55:39,827 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 17:55:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 17:55:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 17:55:39,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:39,838 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:39,839 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:39,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1861917190, now seen corresponding path program 1 times [2024-09-12 17:55:39,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:39,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685485351] [2024-09-12 17:55:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:39,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:39,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:39,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:39,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685485351] [2024-09-12 17:55:40,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685485351] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 17:55:40,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 17:55:40,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 17:55:40,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917185513] [2024-09-12 17:55:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 17:55:40,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 17:55:40,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:55:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 17:55:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 17:55:40,035 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:55:40,065 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-09-12 17:55:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 17:55:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-12 17:55:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:55:40,071 INFO L225 Difference]: With dead ends: 28 [2024-09-12 17:55:40,072 INFO L226 Difference]: Without dead ends: 11 [2024-09-12 17:55:40,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 17:55:40,078 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 17:55:40,079 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 17:55:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-09-12 17:55:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-09-12 17:55:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-09-12 17:55:40,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 10 [2024-09-12 17:55:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:55:40,106 INFO L474 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-09-12 17:55:40,106 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-09-12 17:55:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 17:55:40,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:40,108 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:40,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 17:55:40,108 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:40,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1858223106, now seen corresponding path program 1 times [2024-09-12 17:55:40,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:40,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786153128] [2024-09-12 17:55:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:40,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786153128] [2024-09-12 17:55:40,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786153128] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 17:55:40,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 17:55:40,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 17:55:40,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190516909] [2024-09-12 17:55:40,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 17:55:40,226 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 17:55:40,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:55:40,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 17:55:40,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 17:55:40,227 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:55:40,238 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-09-12 17:55:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 17:55:40,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-12 17:55:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:55:40,239 INFO L225 Difference]: With dead ends: 17 [2024-09-12 17:55:40,239 INFO L226 Difference]: Without dead ends: 12 [2024-09-12 17:55:40,242 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 17:55:40,243 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 17:55:40,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 17:55:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-12 17:55:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-12 17:55:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-09-12 17:55:40,252 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2024-09-12 17:55:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:55:40,252 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-09-12 17:55:40,252 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,253 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-09-12 17:55:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-12 17:55:40,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 17:55:40,254 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 17:55:40,254 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 17:55:40,254 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 17:55:40,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1806802702, now seen corresponding path program 1 times [2024-09-12 17:55:40,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 17:55:40,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139665104] [2024-09-12 17:55:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:40,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 17:55:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 17:55:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 17:55:40,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139665104] [2024-09-12 17:55:40,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139665104] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 17:55:40,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100345735] [2024-09-12 17:55:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 17:55:40,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 17:55:40,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 17:55:40,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 17:55:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 17:55:40,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 17:55:40,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 17:55:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 17:55:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 17:55:40,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100345735] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 17:55:40,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 17:55:40,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2024-09-12 17:55:40,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155510526] [2024-09-12 17:55:40,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 17:55:40,662 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 17:55:40,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 17:55:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 17:55:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-12 17:55:40,667 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 17:55:40,753 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2024-09-12 17:55:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 17:55:40,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-12 17:55:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 17:55:40,754 INFO L225 Difference]: With dead ends: 17 [2024-09-12 17:55:40,754 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 17:55:40,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-09-12 17:55:40,756 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 17:55:40,759 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 17:55:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 17:55:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 17:55:40,760 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) [2024-09-12 17:55:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 17:55:40,760 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2024-09-12 17:55:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 17:55:40,760 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 17:55:40,760 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 17:55:40,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 17:55:40,761 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 17:55:40,761 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 17:55:40,766 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 17:55:40,784 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 17:55:40,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 17:55:40,970 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-09-12 17:55:40,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 17:55:41,034 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 17:55:41,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 05:55:41 BoogieIcfgContainer [2024-09-12 17:55:41,055 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 17:55:41,055 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 17:55:41,057 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 17:55:41,057 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 17:55:41,057 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 05:55:39" (3/4) ... [2024-09-12 17:55:41,059 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 17:55:41,062 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 17:55:41,063 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 17:55:41,063 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-12 17:55:41,066 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2024-09-12 17:55:41,068 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-09-12 17:55:41,068 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-09-12 17:55:41,068 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 17:55:41,140 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 17:55:41,140 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 17:55:41,140 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 17:55:41,141 INFO L158 Benchmark]: Toolchain (without parser) took 2032.39ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 45.5MB in the beginning and 53.2MB in the end (delta: -7.7MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2024-09-12 17:55:41,141 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 17:55:41,141 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.95ms. Allocated memory is still 77.6MB. Free memory was 45.2MB in the beginning and 34.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-12 17:55:41,142 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.55ms. Allocated memory is still 77.6MB. Free memory was 34.1MB in the beginning and 33.1MB in the end (delta: 998.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 17:55:41,142 INFO L158 Benchmark]: Boogie Preprocessor took 48.70ms. Allocated memory is still 77.6MB. Free memory was 33.1MB in the beginning and 57.4MB in the end (delta: -24.3MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2024-09-12 17:55:41,142 INFO L158 Benchmark]: RCFGBuilder took 304.57ms. Allocated memory is still 77.6MB. Free memory was 57.4MB in the beginning and 47.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-12 17:55:41,142 INFO L158 Benchmark]: TraceAbstraction took 1317.29ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 46.3MB in the beginning and 57.4MB in the end (delta: -11.1MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2024-09-12 17:55:41,143 INFO L158 Benchmark]: Witness Printer took 84.68ms. Allocated memory is still 94.4MB. Free memory was 57.4MB in the beginning and 53.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-12 17:55:41,147 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.95ms. Allocated memory is still 77.6MB. Free memory was 45.2MB in the beginning and 34.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.55ms. Allocated memory is still 77.6MB. Free memory was 34.1MB in the beginning and 33.1MB in the end (delta: 998.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.70ms. Allocated memory is still 77.6MB. Free memory was 33.1MB in the beginning and 57.4MB in the end (delta: -24.3MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * RCFGBuilder took 304.57ms. Allocated memory is still 77.6MB. Free memory was 57.4MB in the beginning and 47.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1317.29ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 46.3MB in the beginning and 57.4MB in the end (delta: -11.1MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. * Witness Printer took 84.68ms. Allocated memory is still 94.4MB. Free memory was 57.4MB in the beginning and 53.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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: 7]: 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 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 66 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 36 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 42 IncrementalHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 30 mSDtfsCounter, 42 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 96 SizeOfPredicates, 0 NumberOfNonLiveVariables, 47 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 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: 16]: Loop Invariant Derived loop invariant: (((x % 4294967296) == 6) || ((x % 4294967296) < 6)) - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (0 < \old(cond)) Ensures: (0 < \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-12 17:55:41,177 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE