./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.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 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:36:13,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:36:13,313 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:36:13,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:36:13,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:36:13,333 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:36:13,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:36:13,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:36:13,334 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:36:13,334 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:36:13,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:36:13,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:36:13,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:36:13,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:36:13,336 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:36:13,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:36:13,337 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:36:13,337 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:36:13,337 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:36:13,337 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:36:13,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:36:13,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:36:13,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:36:13,341 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:36:13,341 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:36:13,341 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:36:13,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:36:13,342 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:36:13,342 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:36:13,342 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:36:13,342 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:36:13,342 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:36:13,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:36:13,343 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:36:13,343 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:36:13,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:36:13,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:36:13,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:36:13,343 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:36:13,343 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:36:13,343 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:36:13,344 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:36:13,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:36:13,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:36:13,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:36:13,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:36:13,545 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:36:13,546 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:36:13,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2024-09-18 16:36:14,780 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:36:14,938 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:36:14,939 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2024-09-18 16:36:14,949 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5c9d20209/d6b1c55c0d7c415184147ea88d876de4/FLAGb0958b60a [2024-09-18 16:36:15,345 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5c9d20209/d6b1c55c0d7c415184147ea88d876de4 [2024-09-18 16:36:15,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:36:15,348 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:36:15,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:36:15,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:36:15,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:36:15,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e81737a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15, skipping insertion in model container [2024-09-18 16:36:15,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,392 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:36:15,569 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/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2024-09-18 16:36:15,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:36:15,618 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:36:15,629 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/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2024-09-18 16:36:15,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:36:15,649 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:36:15,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15 WrapperNode [2024-09-18 16:36:15,649 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:36:15,650 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:36:15,651 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:36:15,651 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:36:15,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,683 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:36:15,683 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:36:15,684 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:36:15,684 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:36:15,684 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:36:15,691 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,695 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,711 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]. [2024-09-18 16:36:15,712 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,712 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,714 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,721 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,722 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:36:15,724 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:36:15,724 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:36:15,724 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:36:15,724 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (1/1) ... [2024-09-18 16:36:15,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:36:15,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:36:15,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 16:36:15,773 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 16:36:15,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:36:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:36:15,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:36:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:36:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:36:15,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:36:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:36:15,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:36:15,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:36:15,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:36:15,854 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:36:15,856 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:36:15,976 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-18 16:36:15,977 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:36:15,989 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:36:15,989 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 16:36:15,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:36:15 BoogieIcfgContainer [2024-09-18 16:36:15,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:36:15,991 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:36:15,991 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:36:15,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:36:15,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:36:15" (1/3) ... [2024-09-18 16:36:15,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74305316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:36:15, skipping insertion in model container [2024-09-18 16:36:15,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:36:15" (2/3) ... [2024-09-18 16:36:15,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74305316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:36:15, skipping insertion in model container [2024-09-18 16:36:15,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:36:15" (3/3) ... [2024-09-18 16:36:15,995 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.c [2024-09-18 16:36:16,007 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:36:16,007 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:36:16,044 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:36:16,050 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;@1217914b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:36:16,050 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:36:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-18 16:36:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 16:36:16,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:36:16,058 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:16,059 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:36:16,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash -97680429, now seen corresponding path program 1 times [2024-09-18 16:36:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:36:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493896457] [2024-09-18 16:36:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:16,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:36:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:16,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:36:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:36:16,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:36:16,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493896457] [2024-09-18 16:36:16,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493896457] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:36:16,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:36:16,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 16:36:16,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232484786] [2024-09-18 16:36:16,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:36:16,179 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 16:36:16,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:36:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 16:36:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:36:16,196 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:36:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:36:16,250 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2024-09-18 16:36:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 16:36:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 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) Word has length 10 [2024-09-18 16:36:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:36:16,257 INFO L225 Difference]: With dead ends: 44 [2024-09-18 16:36:16,257 INFO L226 Difference]: Without dead ends: 21 [2024-09-18 16:36:16,260 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:36:16,262 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:36:16,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:36:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-18 16:36:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-18 16:36:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 16:36:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-09-18 16:36:16,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2024-09-18 16:36:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:36:16,288 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-09-18 16:36:16,289 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:36:16,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-09-18 16:36:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 16:36:16,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:36:16,290 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:16,290 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:36:16,290 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:36:16,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:16,291 INFO L85 PathProgramCache]: Analyzing trace with hash 801118595, now seen corresponding path program 1 times [2024-09-18 16:36:16,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:36:16,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553087479] [2024-09-18 16:36:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:16,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:36:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:16,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:36:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:36:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:36:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553087479] [2024-09-18 16:36:16,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553087479] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:36:16,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:36:16,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 16:36:16,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43738374] [2024-09-18 16:36:16,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:36:16,388 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:36:16,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:36:16,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:36:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:36:16,389 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:36:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:36:16,470 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-09-18 16:36:16,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:36:16,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-18 16:36:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:36:16,471 INFO L225 Difference]: With dead ends: 31 [2024-09-18 16:36:16,471 INFO L226 Difference]: Without dead ends: 22 [2024-09-18 16:36:16,472 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:36:16,473 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:36:16,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:36:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-18 16:36:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-18 16:36:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 16:36:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-09-18 16:36:16,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2024-09-18 16:36:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:36:16,490 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-09-18 16:36:16,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:36:16,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-09-18 16:36:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 16:36:16,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:36:16,492 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:16,492 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:36:16,492 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:36:16,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash 802786891, now seen corresponding path program 1 times [2024-09-18 16:36:16,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:36:16,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094824222] [2024-09-18 16:36:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:16,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:36:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:16,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:36:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:36:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:36:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094824222] [2024-09-18 16:36:16,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094824222] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:36:16,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:36:16,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 16:36:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423058728] [2024-09-18 16:36:16,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:36:16,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:36:16,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:36:16,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:36:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:36:16,648 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:36:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:36:16,768 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-09-18 16:36:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 16:36:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 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) Word has length 11 [2024-09-18 16:36:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:36:16,770 INFO L225 Difference]: With dead ends: 35 [2024-09-18 16:36:16,770 INFO L226 Difference]: Without dead ends: 33 [2024-09-18 16:36:16,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:36:16,771 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:36:16,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:36:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-18 16:36:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-18 16:36:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:36:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-18 16:36:16,791 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2024-09-18 16:36:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:36:16,791 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-18 16:36:16,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:36:16,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-18 16:36:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 16:36:16,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:36:16,792 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:16,793 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 16:36:16,793 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:36:16,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1280493866, now seen corresponding path program 1 times [2024-09-18 16:36:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:36:16,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225031774] [2024-09-18 16:36:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:16,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:36:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:36:16,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215318037] [2024-09-18 16:36:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:16,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:36:16,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:36:16,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:36:16,824 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:36:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:16,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:36:16,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:36:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:36:16,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:36:16,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:36:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225031774] [2024-09-18 16:36:16,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:36:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215318037] [2024-09-18 16:36:16,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215318037] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:36:16,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:36:16,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:36:16,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570750500] [2024-09-18 16:36:16,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:36:16,942 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:36:16,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:36:16,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:36:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:36:16,944 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:36:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:36:17,060 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-09-18 16:36:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:36:17,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-09-18 16:36:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:36:17,063 INFO L225 Difference]: With dead ends: 39 [2024-09-18 16:36:17,065 INFO L226 Difference]: Without dead ends: 37 [2024-09-18 16:36:17,066 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:36:17,067 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:36:17,067 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:36:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-18 16:36:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-09-18 16:36:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-18 16:36:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-09-18 16:36:17,086 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 16 [2024-09-18 16:36:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:36:17,087 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-09-18 16:36:17,087 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:36:17,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-09-18 16:36:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 16:36:17,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:36:17,088 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:17,134 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 16:36:17,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:36:17,310 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:36:17,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash 925975787, now seen corresponding path program 1 times [2024-09-18 16:36:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:36:17,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079053821] [2024-09-18 16:36:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:17,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:36:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:36:17,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706304873] [2024-09-18 16:36:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:17,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:36:17,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:36:17,335 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) [2024-09-18 16:36:17,338 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:36:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:17,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:36:17,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:36:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:36:17,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:36:17,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:36:17,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079053821] [2024-09-18 16:36:17,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:36:17,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706304873] [2024-09-18 16:36:17,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706304873] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:36:17,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:36:17,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:36:17,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351050301] [2024-09-18 16:36:17,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:36:17,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:36:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:36:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:36:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:36:17,413 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 16:36:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:36:17,445 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-09-18 16:36:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:36:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-18 16:36:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:36:17,446 INFO L225 Difference]: With dead ends: 43 [2024-09-18 16:36:17,447 INFO L226 Difference]: Without dead ends: 38 [2024-09-18 16:36:17,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:36:17,448 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:36:17,448 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:36:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-18 16:36:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-18 16:36:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:36:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-18 16:36:17,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2024-09-18 16:36:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:36:17,454 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-18 16:36:17,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 16:36:17,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-18 16:36:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-18 16:36:17,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:36:17,455 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:17,470 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:36:17,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:36:17,660 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:36:17,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1435580062, now seen corresponding path program 1 times [2024-09-18 16:36:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:36:17,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518583498] [2024-09-18 16:36:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:17,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:36:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:17,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:36:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:17,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-18 16:36:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:17,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 16:36:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:17,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 16:36:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:36:17,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:36:17,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518583498] [2024-09-18 16:36:17,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518583498] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:36:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175604104] [2024-09-18 16:36:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:17,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:36:17,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:36:17,753 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) [2024-09-18 16:36:17,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:36:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:17,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:36:17,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:36:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:36:17,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:36:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:36:17,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175604104] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:36:17,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:36:17,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-18 16:36:17,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429255219] [2024-09-18 16:36:17,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:36:17,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 16:36:17,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:36:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 16:36:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:36:17,874 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-18 16:36:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:36:18,032 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2024-09-18 16:36:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:36:18,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 29 [2024-09-18 16:36:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:36:18,033 INFO L225 Difference]: With dead ends: 79 [2024-09-18 16:36:18,033 INFO L226 Difference]: Without dead ends: 70 [2024-09-18 16:36:18,034 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:36:18,034 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:36:18,035 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:36:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-18 16:36:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-09-18 16:36:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-18 16:36:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2024-09-18 16:36:18,044 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 29 [2024-09-18 16:36:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:36:18,044 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2024-09-18 16:36:18,044 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-18 16:36:18,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2024-09-18 16:36:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-18 16:36:18,045 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:36:18,045 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:18,058 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:36:18,245 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 16:36:18,246 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:36:18,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1437248358, now seen corresponding path program 1 times [2024-09-18 16:36:18,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:36:18,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736318479] [2024-09-18 16:36:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:18,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:36:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:18,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:36:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:18,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-18 16:36:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:18,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 16:36:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:18,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 16:36:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:36:18,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:36:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736318479] [2024-09-18 16:36:18,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736318479] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:36:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282211636] [2024-09-18 16:36:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:18,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:36:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:36:18,343 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) [2024-09-18 16:36:18,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:36:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:36:18,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 16:36:18,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:36:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:36:18,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:36:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:36:18,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282211636] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 16:36:18,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:36:18,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 10 [2024-09-18 16:36:18,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334954738] [2024-09-18 16:36:18,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:36:18,513 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:36:18,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:36:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:36:18,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:36:18,514 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:36:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:36:18,610 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-09-18 16:36:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:36:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-09-18 16:36:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:36:18,612 INFO L225 Difference]: With dead ends: 80 [2024-09-18 16:36:18,612 INFO L226 Difference]: Without dead ends: 78 [2024-09-18 16:36:18,613 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:36:18,613 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:36:18,613 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:36:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-18 16:36:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-18 16:36:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-18 16:36:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2024-09-18 16:36:18,632 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 29 [2024-09-18 16:36:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:36:18,633 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2024-09-18 16:36:18,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:36:18,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2024-09-18 16:36:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 16:36:18,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:36:18,634 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:18,646 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 16:36:18,838 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:36:18,839 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:36:18,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:18,839 INFO L85 PathProgramCache]: Analyzing trace with hash 857281179, now seen corresponding path program 2 times [2024-09-18 16:36:18,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:36:18,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441752325] [2024-09-18 16:36:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:36:18,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:36:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:36:18,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210150212] [2024-09-18 16:36:18,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:36:18,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:36:18,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:36:18,851 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) [2024-09-18 16:36:18,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:36:18,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:36:18,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:36:18,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 16:36:18,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:36:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:36:18,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:36:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:36:19,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:36:19,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441752325] [2024-09-18 16:36:19,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:36:19,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210150212] [2024-09-18 16:36:19,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210150212] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:36:19,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:36:19,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-18 16:36:19,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434904577] [2024-09-18 16:36:19,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:36:19,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 16:36:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:36:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 16:36:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-18 16:36:19,117 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-18 16:36:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:36:19,252 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2024-09-18 16:36:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 16:36:19,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 34 [2024-09-18 16:36:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:36:19,253 INFO L225 Difference]: With dead ends: 78 [2024-09-18 16:36:19,253 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 16:36:19,254 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-18 16:36:19,254 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:36:19,254 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:36:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 16:36:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 16:36:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-18 16:36:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 16:36:19,255 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2024-09-18 16:36:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:36:19,255 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 16:36:19,255 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-18 16:36:19,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:36:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 16:36:19,256 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 16:36:19,260 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 16:36:19,274 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 16:36:19,460 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-18 16:36:19,464 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2024-09-18 16:36:19,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-18 16:36:19,969 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-18 16:36:19,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 04:36:19 BoogieIcfgContainer [2024-09-18 16:36:19,990 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-18 16:36:19,991 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-18 16:36:19,991 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-18 16:36:19,991 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-18 16:36:19,992 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:36:15" (3/4) ... [2024-09-18 16:36:19,993 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-18 16:36:20,040 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-18 16:36:20,041 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-18 16:36:20,041 INFO L158 Benchmark]: Toolchain (without parser) took 4693.25ms. Allocated memory was 178.3MB in the beginning and 228.6MB in the end (delta: 50.3MB). Free memory was 119.2MB in the beginning and 160.8MB in the end (delta: -41.5MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2024-09-18 16:36:20,041 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory was 50.5MB in the beginning and 50.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:36:20,042 INFO L158 Benchmark]: CACSL2BoogieTranslator took 300.88ms. Allocated memory is still 178.3MB. Free memory was 118.7MB in the beginning and 151.1MB in the end (delta: -32.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-18 16:36:20,042 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.12ms. Allocated memory is still 178.3MB. Free memory was 151.1MB in the beginning and 150.1MB in the end (delta: 969.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:36:20,042 INFO L158 Benchmark]: Boogie Preprocessor took 39.34ms. Allocated memory is still 178.3MB. Free memory was 150.1MB in the beginning and 149.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:36:20,042 INFO L158 Benchmark]: RCFGBuilder took 266.38ms. Allocated memory is still 178.3MB. Free memory was 148.1MB in the beginning and 135.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-18 16:36:20,042 INFO L158 Benchmark]: TraceAbstraction took 3999.41ms. Allocated memory was 178.3MB in the beginning and 228.6MB in the end (delta: 50.3MB). Free memory was 135.5MB in the beginning and 162.8MB in the end (delta: -27.3MB). Peak memory consumption was 89.0MB. Max. memory is 16.1GB. [2024-09-18 16:36:20,043 INFO L158 Benchmark]: Witness Printer took 49.71ms. Allocated memory is still 228.6MB. Free memory was 162.8MB in the beginning and 160.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:36:20,044 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory was 50.5MB in the beginning and 50.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 300.88ms. Allocated memory is still 178.3MB. Free memory was 118.7MB in the beginning and 151.1MB in the end (delta: -32.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.12ms. Allocated memory is still 178.3MB. Free memory was 151.1MB in the beginning and 150.1MB in the end (delta: 969.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.34ms. Allocated memory is still 178.3MB. Free memory was 150.1MB in the beginning and 149.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 266.38ms. Allocated memory is still 178.3MB. Free memory was 148.1MB in the beginning and 135.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3999.41ms. Allocated memory was 178.3MB in the beginning and 228.6MB in the end (delta: 50.3MB). Free memory was 135.5MB in the beginning and 162.8MB in the end (delta: -27.3MB). Peak memory consumption was 89.0MB. Max. memory is 16.1GB. * Witness Printer took 49.71ms. Allocated memory is still 228.6MB. Free memory was 162.8MB in the beginning and 160.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 554 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 397 mSDsCounter, 99 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 449 IncrementalHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 99 mSolverCounterUnsat, 157 mSDtfsCounter, 449 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 290 NumberOfCodeBlocks, 290 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 912 SizeOfPredicates, 7 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 168/205 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: 30]: Loop Invariant Derived loop invariant: (((((((__int128) a * 2) + ((__int128) a * a)) + 1) == s) && (\old(counter) == 0)) && (t == (((__int128) a * 2) + 1))) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-18 16:36:20,063 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