./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard2.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/hard2.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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --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 [2024-09-17 18:33:04,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:33:04,654 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:33:04,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:33:04,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:33:04,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:33:04,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:33:04,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:33:04,690 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:33:04,692 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:33:04,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:33:04,693 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:33:04,694 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:33:04,697 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:33:04,697 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:33:04,709 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:33:04,710 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:33:04,710 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:33:04,711 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:33:04,711 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:33:04,711 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:33:04,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:33:04,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:33:04,713 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:33:04,714 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:33:04,714 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:33:04,714 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:33:04,714 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:33:04,714 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:33:04,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:33:04,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:33:04,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:33:04,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:33:04,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:33:04,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:33:04,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:33:04,716 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:33:04,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:33:04,718 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:33:04,718 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:33:04,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:33:04,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:33:04,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:33:04,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:33:04,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:33:04,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:33:04,972 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:33:04,973 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:33:04,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/hard2.c [2024-09-17 18:33:06,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:33:06,471 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:33:06,472 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard2.c [2024-09-17 18:33:06,478 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b946343bc/911b38f5139b48889961551f7f17fc0d/FLAGd67210d92 [2024-09-17 18:33:06,850 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b946343bc/911b38f5139b48889961551f7f17fc0d [2024-09-17 18:33:06,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:33:06,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:33:06,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:33:06,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:33:06,866 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:33:06,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:33:06" (1/1) ... [2024-09-17 18:33:06,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3458159c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:06, skipping insertion in model container [2024-09-17 18:33:06,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:33:06" (1/1) ... [2024-09-17 18:33:06,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:33:07,033 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/hard2.c[526,539] [2024-09-17 18:33:07,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:33:07,062 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:33:07,073 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/hard2.c[526,539] [2024-09-17 18:33:07,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:33:07,101 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:33:07,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07 WrapperNode [2024-09-17 18:33:07,102 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:33:07,103 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:33:07,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:33:07,104 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:33:07,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,116 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,123 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:33:07,123 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:33:07,124 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:33:07,124 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:33:07,124 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:33:07,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,134 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,147 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-17 18:33:07,147 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,147 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,154 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,155 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,156 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:33:07,157 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:33:07,157 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:33:07,157 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:33:07,158 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (1/1) ... [2024-09-17 18:33:07,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:33:07,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:07,187 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) [2024-09-17 18:33:07,190 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 [2024-09-17 18:33:07,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:33:07,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:33:07,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:33:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:33:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-17 18:33:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:33:07,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:33:07,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:33:07,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:33:07,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:33:07,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:33:07,283 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:33:07,285 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:33:07,410 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-17 18:33:07,410 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:33:07,437 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:33:07,437 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-17 18:33:07,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:33:07 BoogieIcfgContainer [2024-09-17 18:33:07,438 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:33:07,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:33:07,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:33:07,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:33:07,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:33:06" (1/3) ... [2024-09-17 18:33:07,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13066347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:33:07, skipping insertion in model container [2024-09-17 18:33:07,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:33:07" (2/3) ... [2024-09-17 18:33:07,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13066347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:33:07, skipping insertion in model container [2024-09-17 18:33:07,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:33:07" (3/3) ... [2024-09-17 18:33:07,447 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2024-09-17 18:33:07,459 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:33:07,460 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:33:07,514 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:33:07,520 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;@6246f7e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:33:07,521 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:33:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:33:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-17 18:33:07,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:07,532 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:07,533 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:07,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1467428880, now seen corresponding path program 1 times [2024-09-17 18:33:07,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:07,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408923940] [2024-09-17 18:33:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:07,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:33:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:33:07,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:07,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408923940] [2024-09-17 18:33:07,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408923940] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:33:07,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:33:07,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:33:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700743480] [2024-09-17 18:33:07,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:33:07,786 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:33:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:33:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:33:07,810 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:33:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:07,887 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2024-09-17 18:33:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:33:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-17 18:33:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:07,897 INFO L225 Difference]: With dead ends: 62 [2024-09-17 18:33:07,897 INFO L226 Difference]: Without dead ends: 34 [2024-09-17 18:33:07,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:33:07,913 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:07,915 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:33:07,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-17 18:33:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-09-17 18:33:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:33:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-09-17 18:33:07,964 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-09-17 18:33:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:07,965 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-09-17 18:33:07,965 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:33:07,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-09-17 18:33:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-17 18:33:07,967 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:07,967 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:07,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:33:07,967 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:07,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash -740867385, now seen corresponding path program 1 times [2024-09-17 18:33:07,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:07,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586693361] [2024-09-17 18:33:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:08,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:33:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:08,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 18:33:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:33:08,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586693361] [2024-09-17 18:33:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586693361] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:33:08,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:33:08,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:33:08,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408042074] [2024-09-17 18:33:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:33:08,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:33:08,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:33:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:33:08,119 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-09-17 18:33:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:08,180 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2024-09-17 18:33:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:33:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 15 [2024-09-17 18:33:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:08,181 INFO L225 Difference]: With dead ends: 40 [2024-09-17 18:33:08,182 INFO L226 Difference]: Without dead ends: 38 [2024-09-17 18:33:08,183 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:33:08,184 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:08,185 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 88 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:33:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-17 18:33:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2024-09-17 18:33:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:33:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-17 18:33:08,193 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2024-09-17 18:33:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:08,194 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-17 18:33:08,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-09-17 18:33:08,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-17 18:33:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-17 18:33:08,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:08,195 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:08,195 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:33:08,195 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:08,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 51798576, now seen corresponding path program 1 times [2024-09-17 18:33:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:08,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156904480] [2024-09-17 18:33:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:08,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:08,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586870647] [2024-09-17 18:33:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:08,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:08,220 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) [2024-09-17 18:33:08,232 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:33:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:08,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:33:08,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:33:08,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:33:08,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:08,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156904480] [2024-09-17 18:33:08,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:08,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586870647] [2024-09-17 18:33:08,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586870647] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:33:08,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:33:08,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:33:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798600220] [2024-09-17 18:33:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:33:08,395 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:33:08,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:33:08,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:33:08,397 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-09-17 18:33:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:08,477 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2024-09-17 18:33:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:33:08,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 20 [2024-09-17 18:33:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:08,479 INFO L225 Difference]: With dead ends: 57 [2024-09-17 18:33:08,480 INFO L226 Difference]: Without dead ends: 44 [2024-09-17 18:33:08,481 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:33:08,482 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:08,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:33:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-17 18:33:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-17 18:33:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:33:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-09-17 18:33:08,498 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 20 [2024-09-17 18:33:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:08,498 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-09-17 18:33:08,498 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-09-17 18:33:08,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-09-17 18:33:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 18:33:08,499 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:08,500 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:08,513 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 18:33:08,700 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:08,701 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:08,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2131897932, now seen corresponding path program 1 times [2024-09-17 18:33:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:08,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482763140] [2024-09-17 18:33:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:08,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924474090] [2024-09-17 18:33:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:08,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:08,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:08,721 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) [2024-09-17 18:33:08,737 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:33:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:08,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:33:08,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:33:08,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:33:08,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:08,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482763140] [2024-09-17 18:33:08,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:08,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924474090] [2024-09-17 18:33:08,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924474090] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:33:08,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:33:08,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:33:08,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015994778] [2024-09-17 18:33:08,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:33:08,861 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:33:08,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:33:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:33:08,862 INFO L87 Difference]: Start difference. First operand 44 states and 55 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) [2024-09-17 18:33:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:08,931 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-09-17 18:33:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:33:08,932 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 27 [2024-09-17 18:33:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:08,933 INFO L225 Difference]: With dead ends: 57 [2024-09-17 18:33:08,933 INFO L226 Difference]: Without dead ends: 55 [2024-09-17 18:33:08,933 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:33:08,934 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:08,934 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:33:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-17 18:33:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-09-17 18:33:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:33:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-09-17 18:33:08,944 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 27 [2024-09-17 18:33:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:08,945 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-09-17 18:33:08,945 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) [2024-09-17 18:33:08,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-09-17 18:33:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-17 18:33:08,946 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:08,947 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:08,960 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:09,147 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:09,148 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:09,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1419929093, now seen corresponding path program 1 times [2024-09-17 18:33:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:09,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082453317] [2024-09-17 18:33:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:09,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:09,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428549409] [2024-09-17 18:33:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:09,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:09,164 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) [2024-09-17 18:33:09,165 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:33:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-17 18:33:09,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:33:09,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-17 18:33:09,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082453317] [2024-09-17 18:33:09,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428549409] [2024-09-17 18:33:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428549409] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:09,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:33:09,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-17 18:33:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309893312] [2024-09-17 18:33:09,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:33:09,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:33:09,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:33:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:33:09,480 INFO L87 Difference]: Start difference. First operand 54 states and 69 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, (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) [2024-09-17 18:33:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:09,523 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2024-09-17 18:33:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:33:09,524 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, (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 37 [2024-09-17 18:33:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:09,526 INFO L225 Difference]: With dead ends: 64 [2024-09-17 18:33:09,526 INFO L226 Difference]: Without dead ends: 62 [2024-09-17 18:33:09,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:33:09,527 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:09,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 83 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:33:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-17 18:33:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-09-17 18:33:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-17 18:33:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-09-17 18:33:09,540 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 37 [2024-09-17 18:33:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:09,541 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-09-17 18:33:09,541 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, (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) [2024-09-17 18:33:09,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-09-17 18:33:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-17 18:33:09,543 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:09,543 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:09,556 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:33:09,744 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:09,744 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1229363181, now seen corresponding path program 1 times [2024-09-17 18:33:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950125465] [2024-09-17 18:33:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:33:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 18:33:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:33:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:33:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:33:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:33:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:33:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:33:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950125465] [2024-09-17 18:33:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950125465] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:33:09,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:33:09,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:33:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306617012] [2024-09-17 18:33:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:33:09,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:33:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:33:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:33:09,909 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:33:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:09,959 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2024-09-17 18:33:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:33:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2024-09-17 18:33:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:09,960 INFO L225 Difference]: With dead ends: 69 [2024-09-17 18:33:09,960 INFO L226 Difference]: Without dead ends: 57 [2024-09-17 18:33:09,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:33:09,961 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:09,961 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:33:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-17 18:33:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-17 18:33:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:33:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-09-17 18:33:09,973 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 43 [2024-09-17 18:33:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:09,974 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-09-17 18:33:09,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:33:09,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-09-17 18:33:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-17 18:33:09,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:09,975 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:09,975 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-17 18:33:09,975 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:09,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:09,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2039536139, now seen corresponding path program 1 times [2024-09-17 18:33:09,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:09,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575947743] [2024-09-17 18:33:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:10,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7359936] [2024-09-17 18:33:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:10,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:10,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:10,015 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) [2024-09-17 18:33:10,031 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:33:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:10,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-17 18:33:10,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-17 18:33:10,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-17 18:33:11,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:11,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575947743] [2024-09-17 18:33:11,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:11,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7359936] [2024-09-17 18:33:11,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7359936] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:11,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-09-17 18:33:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398592843] [2024-09-17 18:33:11,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:11,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:33:11,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:33:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:33:11,455 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-17 18:33:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:12,002 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2024-09-17 18:33:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:33:12,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 57 [2024-09-17 18:33:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:12,004 INFO L225 Difference]: With dead ends: 132 [2024-09-17 18:33:12,004 INFO L226 Difference]: Without dead ends: 109 [2024-09-17 18:33:12,004 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:33:12,005 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:12,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 222 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:33:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-17 18:33:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-09-17 18:33:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 27 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-17 18:33:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2024-09-17 18:33:12,028 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 57 [2024-09-17 18:33:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:12,029 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2024-09-17 18:33:12,029 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-17 18:33:12,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2024-09-17 18:33:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-17 18:33:12,030 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:12,030 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:12,052 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:12,231 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 [2024-09-17 18:33:12,231 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:12,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:12,232 INFO L85 PathProgramCache]: Analyzing trace with hash 620479267, now seen corresponding path program 1 times [2024-09-17 18:33:12,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:12,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427533722] [2024-09-17 18:33:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:12,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:12,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618961642] [2024-09-17 18:33:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:12,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:12,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:12,257 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) [2024-09-17 18:33:12,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:33:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:12,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-17 18:33:12,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-17 18:33:12,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-17 18:33:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:12,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427533722] [2024-09-17 18:33:12,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618961642] [2024-09-17 18:33:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618961642] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:12,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:12,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-09-17 18:33:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194261444] [2024-09-17 18:33:12,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:12,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:33:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:33:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:33:12,867 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-17 18:33:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:13,282 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2024-09-17 18:33:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:33:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 68 [2024-09-17 18:33:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:13,284 INFO L225 Difference]: With dead ends: 162 [2024-09-17 18:33:13,284 INFO L226 Difference]: Without dead ends: 130 [2024-09-17 18:33:13,284 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:33:13,285 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:13,285 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 199 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:33:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-17 18:33:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2024-09-17 18:33:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.180327868852459) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:33:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2024-09-17 18:33:13,306 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 68 [2024-09-17 18:33:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:13,306 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2024-09-17 18:33:13,306 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-17 18:33:13,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2024-09-17 18:33:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-17 18:33:13,308 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:13,308 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:13,321 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:33:13,511 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 [2024-09-17 18:33:13,512 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:13,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:13,512 INFO L85 PathProgramCache]: Analyzing trace with hash -768337324, now seen corresponding path program 1 times [2024-09-17 18:33:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:13,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770602523] [2024-09-17 18:33:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:13,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:33:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 18:33:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:33:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:33:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:33:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:33:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:33:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:33:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:33:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:33:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:33:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:33:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:33:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:13,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770602523] [2024-09-17 18:33:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770602523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:13,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940891814] [2024-09-17 18:33:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:13,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:13,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:13,923 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:33:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:13,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-17 18:33:13,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:33:14,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:33:14,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940891814] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:14,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:33:14,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-09-17 18:33:14,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218754530] [2024-09-17 18:33:14,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:14,362 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-17 18:33:14,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-17 18:33:14,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:33:14,363 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2024-09-17 18:33:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:14,545 INFO L93 Difference]: Finished difference Result 143 states and 168 transitions. [2024-09-17 18:33:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:33:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 73 [2024-09-17 18:33:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:14,546 INFO L225 Difference]: With dead ends: 143 [2024-09-17 18:33:14,546 INFO L226 Difference]: Without dead ends: 94 [2024-09-17 18:33:14,547 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:33:14,547 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:14,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 276 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:33:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-17 18:33:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-09-17 18:33:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-17 18:33:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2024-09-17 18:33:14,575 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 73 [2024-09-17 18:33:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:14,576 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2024-09-17 18:33:14,576 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2024-09-17 18:33:14,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2024-09-17 18:33:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-17 18:33:14,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:14,577 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:14,590 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 18:33:14,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:14,778 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:14,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash 721076372, now seen corresponding path program 2 times [2024-09-17 18:33:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:14,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413061892] [2024-09-17 18:33:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:14,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:14,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414587924] [2024-09-17 18:33:14,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:33:14,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:14,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:14,815 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:14,823 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:33:14,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:33:14,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:14,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-17 18:33:14,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-17 18:33:15,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-17 18:33:23,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:23,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413061892] [2024-09-17 18:33:23,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414587924] [2024-09-17 18:33:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414587924] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:23,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:23,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-17 18:33:23,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098059817] [2024-09-17 18:33:23,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:23,841 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:33:23,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:33:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:33:23,842 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-17 18:33:34,144 WARN L293 SmtUtils]: Spent 9.97s on a formula simplification. DAG size of input: 168 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:33:37,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 18:33:38,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 18:33:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:39,824 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions. [2024-09-17 18:33:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:33:39,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) Word has length 87 [2024-09-17 18:33:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:39,827 INFO L225 Difference]: With dead ends: 199 [2024-09-17 18:33:39,827 INFO L226 Difference]: Without dead ends: 166 [2024-09-17 18:33:39,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:33:39,828 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:39,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 314 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-17 18:33:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-17 18:33:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2024-09-17 18:33:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 103 states have internal predecessors, (113), 51 states have call successors, (51), 16 states have call predecessors, (51), 15 states have return successors, (49), 42 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-17 18:33:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 213 transitions. [2024-09-17 18:33:39,881 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 213 transitions. Word has length 87 [2024-09-17 18:33:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:39,882 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 213 transitions. [2024-09-17 18:33:39,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-17 18:33:39,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 213 transitions. [2024-09-17 18:33:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-17 18:33:39,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:39,883 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:39,897 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 18:33:40,084 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:40,085 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:40,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:40,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1885445924, now seen corresponding path program 2 times [2024-09-17 18:33:40,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:40,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551729247] [2024-09-17 18:33:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:40,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267246612] [2024-09-17 18:33:40,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:33:40,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:40,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:40,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:40,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:33:40,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:33:40,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:40,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-17 18:33:40,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-17 18:33:40,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-17 18:33:42,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:42,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551729247] [2024-09-17 18:33:42,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:42,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267246612] [2024-09-17 18:33:42,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267246612] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:42,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:42,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-09-17 18:33:42,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406392228] [2024-09-17 18:33:42,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:42,814 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 18:33:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 18:33:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:33:42,815 INFO L87 Difference]: Start difference. First operand 162 states and 213 transitions. Second operand has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-17 18:33:49,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 18:33:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:50,282 INFO L93 Difference]: Finished difference Result 235 states and 312 transitions. [2024-09-17 18:33:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-17 18:33:50,286 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) Word has length 98 [2024-09-17 18:33:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:50,288 INFO L225 Difference]: With dead ends: 235 [2024-09-17 18:33:50,288 INFO L226 Difference]: Without dead ends: 172 [2024-09-17 18:33:50,289 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:33:50,290 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 110 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:50,290 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 310 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 416 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-09-17 18:33:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-17 18:33:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2024-09-17 18:33:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 93 states have internal predecessors, (98), 42 states have call successors, (42), 17 states have call predecessors, (42), 16 states have return successors, (40), 34 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-17 18:33:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2024-09-17 18:33:50,348 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 98 [2024-09-17 18:33:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:50,348 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2024-09-17 18:33:50,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-17 18:33:50,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2024-09-17 18:33:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-17 18:33:50,350 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:50,350 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:50,365 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:50,550 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:50,551 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:50,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1238144755, now seen corresponding path program 2 times [2024-09-17 18:33:50,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:50,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969635093] [2024-09-17 18:33:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:50,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:33:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 18:33:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:33:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:33:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:33:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:33:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:33:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:33:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:33:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:33:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:33:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:33:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:33:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:33:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-17 18:33:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:33:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:33:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-17 18:33:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:50,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969635093] [2024-09-17 18:33:50,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969635093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:50,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104383574] [2024-09-17 18:33:50,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:33:50,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:50,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:50,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:50,899 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:33:50,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:33:50,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:50,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-17 18:33:50,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-17 18:33:51,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-17 18:33:52,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104383574] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:52,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:33:52,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 19 [2024-09-17 18:33:52,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602077183] [2024-09-17 18:33:52,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:52,169 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:33:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:33:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:33:52,170 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2024-09-17 18:33:52,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:52,479 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2024-09-17 18:33:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:33:52,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) Word has length 103 [2024-09-17 18:33:52,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:52,481 INFO L225 Difference]: With dead ends: 170 [2024-09-17 18:33:52,481 INFO L226 Difference]: Without dead ends: 132 [2024-09-17 18:33:52,482 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:33:52,482 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:52,482 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 314 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:33:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-17 18:33:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-09-17 18:33:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 84 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-17 18:33:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2024-09-17 18:33:52,536 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 103 [2024-09-17 18:33:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:52,536 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2024-09-17 18:33:52,536 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2024-09-17 18:33:52,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2024-09-17 18:33:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-17 18:33:52,539 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:52,539 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:52,556 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 18:33:52,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-17 18:33:52,740 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:52,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:52,740 INFO L85 PathProgramCache]: Analyzing trace with hash -840147397, now seen corresponding path program 1 times [2024-09-17 18:33:52,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:52,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597912339] [2024-09-17 18:33:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:33:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-17 18:33:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:33:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:33:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:33:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:33:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:33:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:33:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:33:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:33:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:33:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:33:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:33:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:33:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:33:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:33:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-17 18:33:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-17 18:33:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-17 18:33:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-17 18:33:52,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:52,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597912339] [2024-09-17 18:33:52,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597912339] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:52,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846473769] [2024-09-17 18:33:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:52,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:52,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:52,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:52,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 18:33:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:53,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:33:53,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-17 18:33:53,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-17 18:33:53,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846473769] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:53,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:33:53,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-09-17 18:33:53,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279877694] [2024-09-17 18:33:53,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:53,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:33:53,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:33:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:33:53,250 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-17 18:33:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:53,344 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2024-09-17 18:33:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:33:53,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 115 [2024-09-17 18:33:53,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:53,346 INFO L225 Difference]: With dead ends: 138 [2024-09-17 18:33:53,346 INFO L226 Difference]: Without dead ends: 131 [2024-09-17 18:33:53,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:33:53,346 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:53,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 189 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:33:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-17 18:33:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2024-09-17 18:33:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 33 states have call successors, (33), 17 states have call predecessors, (33), 16 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-17 18:33:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2024-09-17 18:33:53,387 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 115 [2024-09-17 18:33:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:53,387 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2024-09-17 18:33:53,388 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-17 18:33:53,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2024-09-17 18:33:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-17 18:33:53,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:53,389 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:53,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-17 18:33:53,589 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-17 18:33:53,590 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:53,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:53,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1808323179, now seen corresponding path program 3 times [2024-09-17 18:33:53,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:53,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176927938] [2024-09-17 18:33:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:53,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:53,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590389728] [2024-09-17 18:33:53,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:33:53,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:53,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:53,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:53,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 18:33:53,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:33:53,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:53,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-17 18:33:53,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-17 18:33:53,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:54,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:54,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176927938] [2024-09-17 18:33:54,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:54,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590389728] [2024-09-17 18:33:54,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590389728] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:54,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:33:54,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-17 18:33:54,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815641433] [2024-09-17 18:33:54,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:54,986 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:33:54,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:54,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:33:54,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:33:54,986 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 18:33:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:55,109 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2024-09-17 18:33:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:33:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 117 [2024-09-17 18:33:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:55,111 INFO L225 Difference]: With dead ends: 133 [2024-09-17 18:33:55,111 INFO L226 Difference]: Without dead ends: 131 [2024-09-17 18:33:55,111 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:33:55,112 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:55,112 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 64 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:33:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-17 18:33:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-09-17 18:33:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.1125) internal successors, (89), 84 states have internal predecessors, (89), 33 states have call successors, (33), 18 states have call predecessors, (33), 17 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-17 18:33:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-09-17 18:33:55,169 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 117 [2024-09-17 18:33:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:55,170 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-09-17 18:33:55,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 18:33:55,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-09-17 18:33:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:33:55,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:55,173 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:55,192 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:55,373 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-17 18:33:55,373 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:55,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash -725567613, now seen corresponding path program 3 times [2024-09-17 18:33:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:55,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66755715] [2024-09-17 18:33:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:55,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302098925] [2024-09-17 18:33:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:33:55,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:55,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:55,411 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:55,421 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 18:33:55,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:33:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:55,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-17 18:33:55,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 163 proven. 53 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2024-09-17 18:33:55,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-09-17 18:33:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66755715] [2024-09-17 18:33:55,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302098925] [2024-09-17 18:33:55,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302098925] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:55,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:55,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-17 18:33:55,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378333727] [2024-09-17 18:33:55,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:55,702 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:33:55,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:33:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:33:55,703 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2024-09-17 18:33:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:55,898 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2024-09-17 18:33:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:33:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 128 [2024-09-17 18:33:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:55,899 INFO L225 Difference]: With dead ends: 132 [2024-09-17 18:33:55,899 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 18:33:55,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:33:55,900 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:55,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 120 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:33:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 18:33:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 18:33:55,901 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) [2024-09-17 18:33:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 18:33:55,901 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2024-09-17 18:33:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:55,901 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 18:33:55,901 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2024-09-17 18:33:55,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 18:33:55,902 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 18:33:55,904 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-17 18:33:55,917 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-17 18:33:56,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 18:33:56,111 INFO L408 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:56,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-17 18:33:58,477 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 18:33:58,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 06:33:58 BoogieIcfgContainer [2024-09-17 18:33:58,491 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 18:33:58,491 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-17 18:33:58,491 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-17 18:33:58,491 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-17 18:33:58,492 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:33:07" (3/4) ... [2024-09-17 18:33:58,493 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-17 18:33:58,531 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-17 18:33:58,531 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-17 18:33:58,531 INFO L158 Benchmark]: Toolchain (without parser) took 51674.30ms. Allocated memory was 142.6MB in the beginning and 446.7MB in the end (delta: 304.1MB). Free memory was 71.9MB in the beginning and 406.9MB in the end (delta: -335.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 18:33:58,532 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 107.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 18:33:58,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.64ms. Allocated memory was 142.6MB in the beginning and 211.8MB in the end (delta: 69.2MB). Free memory was 71.7MB in the beginning and 180.0MB in the end (delta: -108.2MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2024-09-17 18:33:58,532 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.91ms. Allocated memory is still 211.8MB. Free memory was 180.0MB in the beginning and 179.0MB in the end (delta: 998.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 18:33:58,532 INFO L158 Benchmark]: Boogie Preprocessor took 32.81ms. Allocated memory is still 211.8MB. Free memory was 179.0MB in the beginning and 176.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 18:33:58,532 INFO L158 Benchmark]: RCFGBuilder took 280.54ms. Allocated memory is still 211.8MB. Free memory was 176.9MB in the beginning and 163.2MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-17 18:33:58,532 INFO L158 Benchmark]: TraceAbstraction took 51051.54ms. Allocated memory was 211.8MB in the beginning and 446.7MB in the end (delta: 234.9MB). Free memory was 163.2MB in the beginning and 409.0MB in the end (delta: -245.8MB). Peak memory consumption was 252.2MB. Max. memory is 16.1GB. [2024-09-17 18:33:58,532 INFO L158 Benchmark]: Witness Printer took 39.83ms. Allocated memory is still 446.7MB. Free memory was 409.0MB in the beginning and 406.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 18:33:58,534 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 142.6MB. Free memory was 107.6MB in the beginning and 107.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.64ms. Allocated memory was 142.6MB in the beginning and 211.8MB in the end (delta: 69.2MB). Free memory was 71.7MB in the beginning and 180.0MB in the end (delta: -108.2MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.91ms. Allocated memory is still 211.8MB. Free memory was 180.0MB in the beginning and 179.0MB in the end (delta: 998.8kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.81ms. Allocated memory is still 211.8MB. Free memory was 179.0MB in the beginning and 176.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 280.54ms. Allocated memory is still 211.8MB. Free memory was 176.9MB in the beginning and 163.2MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 51051.54ms. Allocated memory was 211.8MB in the beginning and 446.7MB in the end (delta: 234.9MB). Free memory was 163.2MB in the beginning and 409.0MB in the end (delta: -245.8MB). Peak memory consumption was 252.2MB. Max. memory is 16.1GB. * Witness Printer took 39.83ms. Allocated memory is still 446.7MB. Free memory was 409.0MB in the beginning and 406.9MB 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: 17]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.6s, OverallIterations: 15, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 25.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 336 SdHoareTripleChecker+Valid, 11.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 286 mSDsluCounter, 2544 SdHoareTripleChecker+Invalid, 11.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2115 mSDsCounter, 447 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2308 IncrementalHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 447 mSolverCounterUnsat, 429 mSDtfsCounter, 2308 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1890 GetRequests, 1683 SyntacticMatches, 15 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 16.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=10, InterpolantAutomatonStates: 149, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 79 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 1928 NumberOfCodeBlocks, 1801 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 20692 SizeOfPredicates, 25 NumberOfNonLiveVariables, 2125 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 8825/9435 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: 33]: Loop Invariant Derived loop invariant: ((((((((A == r) && (((long long) A + d) == ((long long) p + r))) && (8 <= p)) && (q == 0)) && (B == 1)) || ((((((A == r) && (p == 2)) && (1 <= r)) && (d == 2)) && (q == 0)) && (B == 1))) || ((((((A == r) && (d == 4)) && (2 <= r)) && (q == 0)) && (B == 1)) && (p == 4))) || (((((A == r) && (d == 1)) && (q == 0)) && (B == 1)) && (p == 1))) - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: ((((A == ((long long) q + r)) && (d == p)) && (1 <= p)) && (B == 1)) - ProcedureContractResult [Line: 14]: 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! [2024-09-17 18:33:58,593 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