./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invariants/even.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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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-invariants/even.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 a11d77723a55ebafbe11c47b32216fcbce161df8cc1523ee701a35936f0f8b18 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:49:44,476 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:49:44,526 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:49:44,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:49:44,532 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:49:44,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:49:44,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:49:44,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:49:44,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:49:44,564 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:49:44,565 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:49:44,565 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:49:44,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:49:44,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:49:44,567 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:49:44,567 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:49:44,567 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:49:44,567 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:49:44,567 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:49:44,568 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:49:44,568 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:49:44,570 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:49:44,570 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:49:44,571 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:49:44,571 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:49:44,571 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:49:44,571 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:49:44,571 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:49:44,571 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:49:44,572 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:49:44,572 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:49:44,572 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:49:44,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:49:44,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:49:44,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:49:44,572 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:49:44,572 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:49:44,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:49:44,573 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:49:44,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:49:44,573 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:49:44,574 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:49:44,574 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a11d77723a55ebafbe11c47b32216fcbce161df8cc1523ee701a35936f0f8b18 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:49:44,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:49:44,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:49:44,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:49:44,816 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:49:44,816 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:49:44,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invariants/even.c [2024-09-18 15:49:46,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:49:46,171 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:49:46,172 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/even.c [2024-09-18 15:49:46,177 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/10368e0cc/0839fa9947b5483890f78cb84add9df5/FLAGe98cc8a38 [2024-09-18 15:49:46,594 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/10368e0cc/0839fa9947b5483890f78cb84add9df5 [2024-09-18 15:49:46,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:49:46,600 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:49:46,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:49:46,601 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:49:46,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:49:46,606 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,607 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d90a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46, skipping insertion in model container [2024-09-18 15:49:46,607 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,622 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:49:46,721 WARN L248 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-invariants/even.c[580,593] [2024-09-18 15:49:46,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:49:46,750 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:49:46,759 WARN L248 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-invariants/even.c[580,593] [2024-09-18 15:49:46,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:49:46,775 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:49:46,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46 WrapperNode [2024-09-18 15:49:46,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:49:46,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:49:46,777 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:49:46,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:49:46,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,788 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,793 INFO L138 Inliner]: procedures = 13, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:49:46,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:49:46,794 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:49:46,794 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:49:46,794 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:49:46,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,803 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,815 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7]. The 0 writes are split as follows [0, 0]. [2024-09-18 15:49:46,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,817 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,820 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:49:46,822 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:49:46,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:49:46,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:49:46,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (1/1) ... [2024-09-18 15:49:46,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:49:46,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:46,846 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) [2024-09-18 15:49:46,848 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 [2024-09-18 15:49:46,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:49:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:49:46,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:49:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:49:46,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:49:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:49:46,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:49:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:49:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 15:49:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:49:46,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:49:46,929 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:49:46,930 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:49:47,005 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-09-18 15:49:47,006 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:49:47,051 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:49:47,051 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 15:49:47,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:49:47 BoogieIcfgContainer [2024-09-18 15:49:47,051 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:49:47,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:49:47,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:49:47,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:49:47,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:49:46" (1/3) ... [2024-09-18 15:49:47,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11767d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:49:47, skipping insertion in model container [2024-09-18 15:49:47,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:46" (2/3) ... [2024-09-18 15:49:47,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11767d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:49:47, skipping insertion in model container [2024-09-18 15:49:47,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:49:47" (3/3) ... [2024-09-18 15:49:47,082 INFO L112 eAbstractionObserver]: Analyzing ICFG even.c [2024-09-18 15:49:47,097 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:49:47,099 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:49:47,148 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:49:47,153 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;@585815da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:49:47,154 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:49:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2024-09-18 15:49:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 15:49:47,163 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:47,164 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:47,165 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:47,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1179372921, now seen corresponding path program 1 times [2024-09-18 15:49:47,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:47,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114273066] [2024-09-18 15:49:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:47,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:47,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:47,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:47,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114273066] [2024-09-18 15:49:47,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114273066] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:49:47,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:49:47,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:49:47,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530971268] [2024-09-18 15:49:47,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:47,319 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:49:47,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:49:47,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:49:47,339 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2024-09-18 15:49:47,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:47,362 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2024-09-18 15:49:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:49:47,364 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 [2024-09-18 15:49:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:47,368 INFO L225 Difference]: With dead ends: 29 [2024-09-18 15:49:47,368 INFO L226 Difference]: Without dead ends: 12 [2024-09-18 15:49:47,370 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 [2024-09-18 15:49:47,373 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:47,375 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:49:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-18 15:49:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-18 15:49:47,399 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) [2024-09-18 15:49:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-09-18 15:49:47,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2024-09-18 15:49:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:47,401 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-09-18 15:49:47,401 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) [2024-09-18 15:49:47,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-09-18 15:49:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 15:49:47,402 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:47,403 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:47,403 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:49:47,403 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:47,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:47,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1872020499, now seen corresponding path program 1 times [2024-09-18 15:49:47,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:47,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540227687] [2024-09-18 15:49:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:47,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:47,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:47,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540227687] [2024-09-18 15:49:47,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540227687] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:49:47,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:49:47,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:49:47,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744892342] [2024-09-18 15:49:47,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:47,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:49:47,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:49:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:49:47,610 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-09-18 15:49:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:47,656 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2024-09-18 15:49:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:49:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2024-09-18 15:49:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:47,657 INFO L225 Difference]: With dead ends: 19 [2024-09-18 15:49:47,657 INFO L226 Difference]: Without dead ends: 14 [2024-09-18 15:49:47,657 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:49:47,658 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:47,659 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:49:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-18 15:49:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-18 15:49:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2024-09-18 15:49:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-09-18 15:49:47,663 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2024-09-18 15:49:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:47,663 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-09-18 15:49:47,664 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-09-18 15:49:47,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-09-18 15:49:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-18 15:49:47,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:47,665 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:47,665 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:49:47,665 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:47,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:47,665 INFO L85 PathProgramCache]: Analyzing trace with hash 414464600, now seen corresponding path program 1 times [2024-09-18 15:49:47,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:47,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927306719] [2024-09-18 15:49:47,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:47,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:47,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:47,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:47,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927306719] [2024-09-18 15:49:47,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927306719] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567312454] [2024-09-18 15:49:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:47,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:47,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:47,827 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) [2024-09-18 15:49:47,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:49:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:47,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:49:47,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:47,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:49:48,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567312454] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:48,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:49:48,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 10 [2024-09-18 15:49:48,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316474526] [2024-09-18 15:49:48,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:48,006 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:49:48,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:49:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:49:48,006 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-09-18 15:49:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:48,026 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2024-09-18 15:49:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:49:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 13 [2024-09-18 15:49:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:48,027 INFO L225 Difference]: With dead ends: 14 [2024-09-18 15:49:48,027 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 15:49:48,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:49:48,029 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 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 [2024-09-18 15:49:48,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:49:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 15:49:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 15:49:48,033 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) [2024-09-18 15:49:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 15:49:48,033 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2024-09-18 15:49:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:48,033 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 15:49:48,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-09-18 15:49:48,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 15:49:48,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 15:49:48,036 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 15:49:48,048 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:49:48,236 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 [2024-09-18 15:49:48,239 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-09-18 15:49:48,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-18 15:49:48,324 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-18 15:49:48,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 03:49:48 BoogieIcfgContainer [2024-09-18 15:49:48,338 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-18 15:49:48,339 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-18 15:49:48,339 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-18 15:49:48,339 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-18 15:49:48,339 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:49:47" (3/4) ... [2024-09-18 15:49:48,341 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-18 15:49:48,393 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-18 15:49:48,394 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-18 15:49:48,396 INFO L158 Benchmark]: Toolchain (without parser) took 1795.12ms. Allocated memory was 165.7MB in the beginning and 205.5MB in the end (delta: 39.8MB). Free memory was 132.5MB in the beginning and 173.8MB in the end (delta: -41.4MB). Peak memory consumption was 67.6MB. Max. memory is 16.1GB. [2024-09-18 15:49:48,396 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 165.7MB. Free memory is still 131.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 15:49:48,396 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.28ms. Allocated memory is still 165.7MB. Free memory was 131.8MB in the beginning and 121.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-18 15:49:48,396 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.26ms. Allocated memory is still 165.7MB. Free memory was 120.8MB in the beginning and 120.1MB in the end (delta: 721.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 15:49:48,397 INFO L158 Benchmark]: Boogie Preprocessor took 27.79ms. Allocated memory is still 165.7MB. Free memory was 120.1MB in the beginning and 118.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 15:49:48,397 INFO L158 Benchmark]: RCFGBuilder took 229.46ms. Allocated memory is still 165.7MB. Free memory was 118.0MB in the beginning and 135.8MB in the end (delta: -17.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-18 15:49:48,397 INFO L158 Benchmark]: TraceAbstraction took 1268.84ms. Allocated memory is still 165.7MB. Free memory was 135.8MB in the beginning and 66.6MB in the end (delta: 69.2MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2024-09-18 15:49:48,400 INFO L158 Benchmark]: Witness Printer took 55.11ms. Allocated memory was 165.7MB in the beginning and 205.5MB in the end (delta: 39.8MB). Free memory was 66.6MB in the beginning and 173.8MB in the end (delta: -107.2MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2024-09-18 15:49:48,401 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 165.7MB. Free memory is still 131.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.28ms. Allocated memory is still 165.7MB. Free memory was 131.8MB in the beginning and 121.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.26ms. Allocated memory is still 165.7MB. Free memory was 120.8MB in the beginning and 120.1MB in the end (delta: 721.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.79ms. Allocated memory is still 165.7MB. Free memory was 120.1MB in the beginning and 118.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 229.46ms. Allocated memory is still 165.7MB. Free memory was 118.0MB in the beginning and 135.8MB in the end (delta: -17.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 1268.84ms. Allocated memory is still 165.7MB. Free memory was 135.8MB in the beginning and 66.6MB in the end (delta: 69.2MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. * Witness Printer took 55.11ms. Allocated memory was 165.7MB in the beginning and 205.5MB in the end (delta: 39.8MB). Free memory was 66.6MB in the beginning and 173.8MB in the end (delta: -107.2MB). Peak memory consumption was 4.9MB. 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: 14]: 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, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 41 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25 IncrementalHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 32 mSDtfsCounter, 25 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 12, 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, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 139 SizeOfPredicates, 1 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/6 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: 20]: Loop Invariant Derived loop invariant: ((x % 2) == 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-18 15:49:48,424 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE