./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/nested_1-1.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 27b49876 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/nested_1-1.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 7d46306d0f449fc697e3921b4f35c60335f25019c8462cefcaf92538159e3d14 --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-27b4987-m [2024-09-21 11:20:01,040 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:20:01,097 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:20:01,101 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:20:01,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:20:01,127 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:20:01,128 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:20:01,128 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:20:01,129 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:20:01,132 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:20:01,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:20:01,132 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:20:01,133 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:20:01,133 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:20:01,133 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:20:01,134 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:20:01,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:20:01,134 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:20:01,134 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:20:01,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:20:01,135 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:20:01,139 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:20:01,139 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:20:01,139 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:20:01,140 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:20:01,140 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:20:01,140 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:20:01,140 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:20:01,140 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:20:01,140 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:20:01,141 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:20:01,141 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:20:01,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:20:01,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:20:01,141 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:20:01,141 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:20:01,141 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:20:01,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:20:01,142 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:20:01,142 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:20:01,142 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:20:01,142 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:20:01,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d46306d0f449fc697e3921b4f35c60335f25019c8462cefcaf92538159e3d14 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:20:01,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:20:01,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:20:01,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:20:01,391 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:20:01,391 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:20:01,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2024-09-21 11:20:02,740 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:20:02,916 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:20:02,917 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2024-09-21 11:20:02,922 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/429388d95/eb8569aa8e1d4855ac00d7555b3f81cd/FLAG252206030 [2024-09-21 11:20:02,933 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/429388d95/eb8569aa8e1d4855ac00d7555b3f81cd [2024-09-21 11:20:02,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:20:02,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:20:02,937 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:20:02,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:20:02,941 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:20:02,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:20:02" (1/1) ... [2024-09-21 11:20:02,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ff45dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:02, skipping insertion in model container [2024-09-21 11:20:02,942 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:20:02" (1/1) ... [2024-09-21 11:20:02,955 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:20:03,067 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-acceleration/nested_1-1.c[322,335] [2024-09-21 11:20:03,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:20:03,096 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:20:03,107 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-acceleration/nested_1-1.c[322,335] [2024-09-21 11:20:03,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:20:03,130 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:20:03,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03 WrapperNode [2024-09-21 11:20:03,131 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:20:03,131 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:20:03,132 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:20:03,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:20:03,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,143 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,147 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:20:03,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:20:03,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:20:03,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:20:03,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:20:03,155 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,157 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,171 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]. [2024-09-21 11:20:03,172 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,172 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,174 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,176 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:20:03,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:20:03,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:20:03,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:20:03,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (1/1) ... [2024-09-21 11:20:03,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:20:03,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:20:03,207 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) [2024-09-21 11:20:03,213 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 [2024-09-21 11:20:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:20:03,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:20:03,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:20:03,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:20:03,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:20:03,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:20:03,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:20:03,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:20:03,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:20:03,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:20:03,323 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:20:03,325 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:20:03,416 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 11:20:03,417 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:20:03,434 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:20:03,434 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 11:20:03,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:20:03 BoogieIcfgContainer [2024-09-21 11:20:03,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:20:03,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:20:03,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:20:03,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:20:03,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:20:02" (1/3) ... [2024-09-21 11:20:03,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26132180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:20:03, skipping insertion in model container [2024-09-21 11:20:03,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:03" (2/3) ... [2024-09-21 11:20:03,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26132180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:20:03, skipping insertion in model container [2024-09-21 11:20:03,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:20:03" (3/3) ... [2024-09-21 11:20:03,440 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2024-09-21 11:20:03,453 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:20:03,453 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:20:03,492 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:20:03,498 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;@42248faf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:20:03,498 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:20:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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) [2024-09-21 11:20:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-21 11:20:03,512 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:20:03,513 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:20:03,513 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:20:03,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1411187330, now seen corresponding path program 1 times [2024-09-21 11:20:03,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:20:03,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477286825] [2024-09-21 11:20:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:20:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:03,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:20:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:20:03,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:20:03,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477286825] [2024-09-21 11:20:03,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477286825] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:20:03,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:20:03,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 11:20:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568893642] [2024-09-21 11:20:03,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:20:03,701 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 11:20:03,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:20:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 11:20:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:20:03,729 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 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) [2024-09-21 11:20:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:20:03,755 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2024-09-21 11:20:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 11:20:03,759 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 [2024-09-21 11:20:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:20:03,763 INFO L225 Difference]: With dead ends: 36 [2024-09-21 11:20:03,763 INFO L226 Difference]: Without dead ends: 16 [2024-09-21 11:20:03,766 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 [2024-09-21 11:20:03,768 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:20:03,769 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:20:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-21 11:20:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2024-09-21 11:20:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2024-09-21 11:20:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-21 11:20:03,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2024-09-21 11:20:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:20:03,850 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-21 11:20:03,851 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) [2024-09-21 11:20:03,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-21 11:20:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 11:20:03,854 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:20:03,855 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:20:03,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:20:03,855 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:20:03,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:03,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1948863384, now seen corresponding path program 1 times [2024-09-21 11:20:03,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:20:03,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721101586] [2024-09-21 11:20:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:03,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:20:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:03,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:20:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:20:03,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:20:03,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721101586] [2024-09-21 11:20:03,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721101586] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:20:03,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:20:03,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 11:20:03,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021712035] [2024-09-21 11:20:03,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:20:03,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 11:20:03,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:20:03,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 11:20:03,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:20:03,944 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-21 11:20:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:20:03,955 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-09-21 11:20:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 11:20:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 [2024-09-21 11:20:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:20:03,956 INFO L225 Difference]: With dead ends: 23 [2024-09-21 11:20:03,956 INFO L226 Difference]: Without dead ends: 15 [2024-09-21 11:20:03,956 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:20:03,957 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 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 [2024-09-21 11:20:03,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:20:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-21 11:20:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-21 11:20:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2024-09-21 11:20:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-09-21 11:20:03,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2024-09-21 11:20:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:20:03,962 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-09-21 11:20:03,963 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-21 11:20:03,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-09-21 11:20:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-21 11:20:03,964 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:20:03,965 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:20:03,965 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:20:03,965 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:20:03,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1727989709, now seen corresponding path program 1 times [2024-09-21 11:20:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:20:03,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543499199] [2024-09-21 11:20:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:03,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:20:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:04,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:20:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:20:04,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:20:04,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543499199] [2024-09-21 11:20:04,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543499199] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:20:04,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726463436] [2024-09-21 11:20:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:04,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:20:04,089 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) [2024-09-21 11:20:04,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:20:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:04,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:20:04,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:20:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:20:04,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:20:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:20:04,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726463436] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:20:04,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:20:04,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2024-09-21 11:20:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226086085] [2024-09-21 11:20:04,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:20:04,216 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 11:20:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:20:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 11:20:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:20:04,217 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2024-09-21 11:20:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:20:04,296 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2024-09-21 11:20:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 11:20:04,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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 14 [2024-09-21 11:20:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:20:04,297 INFO L225 Difference]: With dead ends: 33 [2024-09-21 11:20:04,297 INFO L226 Difference]: Without dead ends: 24 [2024-09-21 11:20:04,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2024-09-21 11:20:04,298 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:20:04,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:20:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-21 11:20:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2024-09-21 11:20:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2024-09-21 11:20:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-21 11:20:04,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2024-09-21 11:20:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:20:04,303 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-21 11:20:04,303 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2024-09-21 11:20:04,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-21 11:20:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-21 11:20:04,304 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:20:04,305 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:20:04,317 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:20:04,506 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 [2024-09-21 11:20:04,507 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:20:04,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1506881752, now seen corresponding path program 2 times [2024-09-21 11:20:04,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:20:04,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828963092] [2024-09-21 11:20:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:04,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:20:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:04,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:20:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:20:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:20:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828963092] [2024-09-21 11:20:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828963092] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:20:04,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126770143] [2024-09-21 11:20:04,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:20:04,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:04,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:20:04,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:20:04,616 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:20:04,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:20:04,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:20:04,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 11:20:04,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:20:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-21 11:20:04,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:20:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-21 11:20:04,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126770143] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:20:04,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:20:04,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-09-21 11:20:04,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463031884] [2024-09-21 11:20:04,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:20:04,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 11:20:04,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:20:04,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 11:20:04,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-09-21 11:20:04,789 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 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) [2024-09-21 11:20:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:20:05,067 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2024-09-21 11:20:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 11:20:05,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 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 17 [2024-09-21 11:20:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:20:05,069 INFO L225 Difference]: With dead ends: 55 [2024-09-21 11:20:05,070 INFO L226 Difference]: Without dead ends: 43 [2024-09-21 11:20:05,071 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 11:20:05,074 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:20:05,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 51 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:20:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-21 11:20:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-21 11:20:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 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) [2024-09-21 11:20:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-09-21 11:20:05,091 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 17 [2024-09-21 11:20:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:20:05,091 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-09-21 11:20:05,092 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 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) [2024-09-21 11:20:05,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-09-21 11:20:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-21 11:20:05,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:20:05,094 INFO L216 NwaCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:20:05,109 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 11:20:05,298 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:05,299 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:20:05,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 540854342, now seen corresponding path program 3 times [2024-09-21 11:20:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:20:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857918894] [2024-09-21 11:20:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:05,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:20:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:05,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:20:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-09-21 11:20:05,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:20:05,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857918894] [2024-09-21 11:20:05,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857918894] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:20:05,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49914000] [2024-09-21 11:20:05,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:20:05,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:20:05,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:20:05,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:20:05,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-21 11:20:05,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:20:05,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-21 11:20:05,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:20:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 85 proven. 115 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-21 11:20:05,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:20:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 115 proven. 15 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-09-21 11:20:05,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49914000] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:20:05,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:20:05,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-21 11:20:05,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380261891] [2024-09-21 11:20:05,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:20:05,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 11:20:05,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:20:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 11:20:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2024-09-21 11:20:05,742 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2024-09-21 11:20:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:20:05,895 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2024-09-21 11:20:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 11:20:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 42 [2024-09-21 11:20:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:20:05,897 INFO L225 Difference]: With dead ends: 94 [2024-09-21 11:20:05,897 INFO L226 Difference]: Without dead ends: 63 [2024-09-21 11:20:05,898 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2024-09-21 11:20:05,898 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:20:05,899 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:20:05,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-21 11:20:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-21 11:20:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 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) [2024-09-21 11:20:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-09-21 11:20:05,919 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 42 [2024-09-21 11:20:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:20:05,919 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-09-21 11:20:05,919 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2024-09-21 11:20:05,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-09-21 11:20:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-21 11:20:05,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:20:05,921 INFO L216 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:20:05,945 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-21 11:20:06,121 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:06,122 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:20:06,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:06,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1186318846, now seen corresponding path program 4 times [2024-09-21 11:20:06,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:20:06,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416653693] [2024-09-21 11:20:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:06,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:20:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:06,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:20:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:20:06,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:20:06,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416653693] [2024-09-21 11:20:06,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416653693] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:20:06,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288786305] [2024-09-21 11:20:06,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:20:06,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:06,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:20:06,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:20:06,339 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:20:06,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:20:06,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:20:06,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-21 11:20:06,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:20:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:20:06,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:20:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 30 proven. 752 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:20:06,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288786305] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:20:06,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:20:06,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 23 [2024-09-21 11:20:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918212943] [2024-09-21 11:20:06,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:20:06,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:20:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:20:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:20:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:20:06,771 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2024-09-21 11:20:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:20:06,979 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2024-09-21 11:20:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 11:20:06,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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 62 [2024-09-21 11:20:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:20:06,981 INFO L225 Difference]: With dead ends: 146 [2024-09-21 11:20:06,981 INFO L226 Difference]: Without dead ends: 141 [2024-09-21 11:20:06,982 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2024-09-21 11:20:06,982 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:20:06,982 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:20:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-21 11:20:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-09-21 11:20:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 136 states have internal predecessors, (147), 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) [2024-09-21 11:20:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2024-09-21 11:20:07,010 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 62 [2024-09-21 11:20:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:20:07,010 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2024-09-21 11:20:07,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2024-09-21 11:20:07,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2024-09-21 11:20:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-21 11:20:07,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:20:07,014 INFO L216 NwaCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:20:07,025 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:20:07,214 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:07,215 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:20:07,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1757928258, now seen corresponding path program 5 times [2024-09-21 11:20:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:20:07,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503194075] [2024-09-21 11:20:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:20:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:07,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:20:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2024-09-21 11:20:07,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:20:07,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503194075] [2024-09-21 11:20:07,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503194075] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:20:07,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361022843] [2024-09-21 11:20:07,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:20:07,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:07,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:20:07,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:20:07,672 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:20:08,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2024-09-21 11:20:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:20:08,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-21 11:20:08,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:20:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5655 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2024-09-21 11:20:08,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:20:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2024-09-21 11:20:08,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361022843] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:20:08,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:20:08,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 33, 13] total 45 [2024-09-21 11:20:08,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829184467] [2024-09-21 11:20:08,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:20:08,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-21 11:20:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:20:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-21 11:20:08,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=1490, Unknown=0, NotChecked=0, Total=1980 [2024-09-21 11:20:08,861 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 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) [2024-09-21 11:20:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:20:11,563 INFO L93 Difference]: Finished difference Result 302 states and 335 transitions. [2024-09-21 11:20:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-21 11:20:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 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 140 [2024-09-21 11:20:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:20:11,568 INFO L225 Difference]: With dead ends: 302 [2024-09-21 11:20:11,568 INFO L226 Difference]: Without dead ends: 297 [2024-09-21 11:20:11,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=940, Invalid=2030, Unknown=0, NotChecked=0, Total=2970 [2024-09-21 11:20:11,570 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:20:11,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 335 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 11:20:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-09-21 11:20:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2024-09-21 11:20:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0787671232876712) internal successors, (315), 292 states have internal predecessors, (315), 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) [2024-09-21 11:20:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 319 transitions. [2024-09-21 11:20:11,633 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 319 transitions. Word has length 140 [2024-09-21 11:20:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:20:11,633 INFO L474 AbstractCegarLoop]: Abstraction has 297 states and 319 transitions. [2024-09-21 11:20:11,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 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) [2024-09-21 11:20:11,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 319 transitions. [2024-09-21 11:20:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2024-09-21 11:20:11,639 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:20:11,639 INFO L216 NwaCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:20:11,652 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 11:20:11,839 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 11:20:11,840 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:20:11,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1606773310, now seen corresponding path program 6 times [2024-09-21 11:20:11,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:20:11,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854837727] [2024-09-21 11:20:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:20:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:20:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:13,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:20:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:20:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2024-09-21 11:20:13,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:20:13,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854837727] [2024-09-21 11:20:13,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854837727] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:20:13,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985358055] [2024-09-21 11:20:13,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:20:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:20:13,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:20:13,142 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:20:13,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-09-21 11:20:13,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:20:13,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 11:20:13,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:20:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 2584 proven. 0 refuted. 0 times theorem prover too weak. 27061 trivial. 0 not checked. [2024-09-21 11:20:13,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:20:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985358055] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:20:13,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:20:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [25] total 30 [2024-09-21 11:20:13,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997389244] [2024-09-21 11:20:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:20:13,612 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 11:20:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:20:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 11:20:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-09-21 11:20:13,613 INFO L87 Difference]: Start difference. First operand 297 states and 319 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-09-21 11:20:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:20:13,772 INFO L93 Difference]: Finished difference Result 297 states and 319 transitions. [2024-09-21 11:20:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 11:20:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 296 [2024-09-21 11:20:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:20:13,774 INFO L225 Difference]: With dead ends: 297 [2024-09-21 11:20:13,774 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 11:20:13,775 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2024-09-21 11:20:13,776 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:20:13,776 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:20:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 11:20:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 11:20:13,777 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) [2024-09-21 11:20:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 11:20:13,777 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 296 [2024-09-21 11:20:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:20:13,777 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 11:20:13,777 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-09-21 11:20:13,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:20:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 11:20:13,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 11:20:13,780 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 11:20:13,794 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 11:20:13,981 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:20:13,984 INFO L408 BasicCegarLoop]: Path program histogram: [6, 1, 1] [2024-09-21 11:20:13,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 11:20:16,939 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 11:20:16,953 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-09-21 11:20:16,955 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-09-21 11:20:16,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:20:16 BoogieIcfgContainer [2024-09-21 11:20:16,956 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-21 11:20:16,956 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-21 11:20:16,956 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-21 11:20:16,957 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-21 11:20:16,957 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:20:03" (3/4) ... [2024-09-21 11:20:16,959 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-21 11:20:17,001 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-21 11:20:17,001 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-21 11:20:17,002 INFO L158 Benchmark]: Toolchain (without parser) took 14066.01ms. Allocated memory was 186.6MB in the beginning and 461.4MB in the end (delta: 274.7MB). Free memory was 116.5MB in the beginning and 183.5MB in the end (delta: -67.0MB). Peak memory consumption was 209.9MB. Max. memory is 16.1GB. [2024-09-21 11:20:17,002 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 186.6MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 11:20:17,002 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.90ms. Allocated memory is still 186.6MB. Free memory was 116.3MB in the beginning and 105.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-21 11:20:17,002 INFO L158 Benchmark]: Boogie Procedure Inliner took 15.86ms. Allocated memory is still 186.6MB. Free memory was 105.2MB in the beginning and 104.3MB in the end (delta: 945.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 11:20:17,002 INFO L158 Benchmark]: Boogie Preprocessor took 30.11ms. Allocated memory is still 186.6MB. Free memory was 104.3MB in the beginning and 102.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 11:20:17,003 INFO L158 Benchmark]: RCFGBuilder took 254.64ms. Allocated memory is still 186.6MB. Free memory was 102.5MB in the beginning and 149.5MB in the end (delta: -47.1MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. [2024-09-21 11:20:17,003 INFO L158 Benchmark]: TraceAbstraction took 13520.13ms. Allocated memory was 186.6MB in the beginning and 461.4MB in the end (delta: 274.7MB). Free memory was 149.4MB in the beginning and 186.6MB in the end (delta: -37.2MB). Peak memory consumption was 280.6MB. Max. memory is 16.1GB. [2024-09-21 11:20:17,003 INFO L158 Benchmark]: Witness Printer took 44.95ms. Allocated memory is still 461.4MB. Free memory was 186.6MB in the beginning and 183.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 11:20:17,004 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 186.6MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.90ms. Allocated memory is still 186.6MB. Free memory was 116.3MB in the beginning and 105.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 15.86ms. Allocated memory is still 186.6MB. Free memory was 105.2MB in the beginning and 104.3MB in the end (delta: 945.8kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.11ms. Allocated memory is still 186.6MB. Free memory was 104.3MB in the beginning and 102.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 254.64ms. Allocated memory is still 186.6MB. Free memory was 102.5MB in the beginning and 149.5MB in the end (delta: -47.1MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. * TraceAbstraction took 13520.13ms. Allocated memory was 186.6MB in the beginning and 461.4MB in the end (delta: 274.7MB). Free memory was 149.4MB in the beginning and 186.6MB in the end (delta: -37.2MB). Peak memory consumption was 280.6MB. Max. memory is 16.1GB. * Witness Printer took 44.95ms. Allocated memory is still 461.4MB. Free memory was 186.6MB in the beginning and 183.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression * 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, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.5s, OverallIterations: 8, TraceHistogramMax: 220, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 114 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 114 mSDsluCounter, 738 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 620 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1876 IncrementalHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 118 mSDtfsCounter, 1876 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 971 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=297occurred in iteration=7, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1165 NumberOfCodeBlocks, 926 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 1421 ConstructedInterpolants, 2 QuantifiedInterpolants, 4329 SizeOfPredicates, 4 NumberOfNonLiveVariables, 999 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 33753/81377 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 == 0) || (((x + 4294967295) % 4294967296) < 268435455)) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((x == 0) || ((x <= 268435454) && (((x + 4294967295) % 4294967296) <= 268435454))) - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: ((0 <= cond) && (cond <= 1)) Ensures: ((0 <= cond) && (cond <= 1)) RESULT: Ultimate proved your program to be correct! [2024-09-21 11:20:17,039 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