./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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/loops-crafted-1/nested3-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --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-f1d7dc9-m [2024-09-20 12:11:16,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:11:16,078 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:11:16,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:11:16,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:11:16,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:11:16,112 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:11:16,112 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:11:16,113 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:11:16,114 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:11:16,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:11:16,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:11:16,116 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:11:16,140 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:11:16,141 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:11:16,141 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:11:16,141 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:11:16,142 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:11:16,142 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:11:16,142 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:11:16,142 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:11:16,144 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:11:16,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:11:16,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:11:16,145 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:11:16,145 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:11:16,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:11:16,145 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:11:16,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:11:16,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:11:16,147 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:11:16,147 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:11:16,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:11:16,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:11:16,148 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:11:16,148 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:11:16,148 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:11:16,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:11:16,148 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:11:16,149 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:11:16,149 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:11:16,151 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:11:16,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:11:16,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:11:16,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:11:16,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:11:16,427 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:11:16,427 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:11:16,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2024-09-20 12:11:17,895 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:11:18,071 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:11:18,071 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2024-09-20 12:11:18,078 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e7315d24f/1a4fbcaa60734a25880b50b99f6d9116/FLAG1853c4d90 [2024-09-20 12:11:18,467 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e7315d24f/1a4fbcaa60734a25880b50b99f6d9116 [2024-09-20 12:11:18,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:11:18,471 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:11:18,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:11:18,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:11:18,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:11:18,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111ab18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18, skipping insertion in model container [2024-09-20 12:11:18,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,500 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:11:18,669 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/loops-crafted-1/nested3-1.c[321,334] [2024-09-20 12:11:18,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:11:18,700 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:11:18,709 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/loops-crafted-1/nested3-1.c[321,334] [2024-09-20 12:11:18,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:11:18,727 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:11:18,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18 WrapperNode [2024-09-20 12:11:18,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:11:18,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:11:18,729 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:11:18,729 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:11:18,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,741 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,747 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:11:18,747 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:11:18,748 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:11:18,748 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:11:18,748 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:11:18,756 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,757 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,769 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 12:11:18,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:11:18,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:11:18,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:11:18,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:11:18,785 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (1/1) ... [2024-09-20 12:11:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:11:18,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:18,827 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) [2024-09-20 12:11:18,831 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 [2024-09-20 12:11:18,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:11:18,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:11:18,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:11:18,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:11:18,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:11:18,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:11:18,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:11:18,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:11:18,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:11:18,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:11:18,948 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:11:18,950 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:11:19,107 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-20 12:11:19,107 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:11:19,140 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:11:19,140 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 12:11:19,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:11:19 BoogieIcfgContainer [2024-09-20 12:11:19,141 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:11:19,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:11:19,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:11:19,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:11:19,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:11:18" (1/3) ... [2024-09-20 12:11:19,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd51721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:11:19, skipping insertion in model container [2024-09-20 12:11:19,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:18" (2/3) ... [2024-09-20 12:11:19,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd51721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:11:19, skipping insertion in model container [2024-09-20 12:11:19,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:11:19" (3/3) ... [2024-09-20 12:11:19,149 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2024-09-20 12:11:19,167 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:11:19,168 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:11:19,230 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:11:19,237 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;@390304c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:11:19,238 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:11:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:11:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-20 12:11:19,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:19,250 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:19,251 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:19,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash -91449342, now seen corresponding path program 1 times [2024-09-20 12:11:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:19,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931604697] [2024-09-20 12:11:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:19,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:19,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:19,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:19,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931604697] [2024-09-20 12:11:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931604697] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:11:19,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:11:19,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 12:11:19,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124229126] [2024-09-20 12:11:19,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:11:19,535 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 12:11:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:19,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 12:11:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:19,560 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:19,595 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2024-09-20 12:11:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 12:11:19,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-20 12:11:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:19,602 INFO L225 Difference]: With dead ends: 48 [2024-09-20 12:11:19,603 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 12:11:19,605 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:19,609 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:19,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 12:11:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2024-09-20 12:11:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:11:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-09-20 12:11:19,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2024-09-20 12:11:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:19,641 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-09-20 12:11:19,641 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:19,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-09-20 12:11:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 12:11:19,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:19,643 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:19,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:11:19,644 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:19,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:19,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1474394065, now seen corresponding path program 1 times [2024-09-20 12:11:19,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:19,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689655440] [2024-09-20 12:11:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:19,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:19,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689655440] [2024-09-20 12:11:19,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689655440] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:11:19,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:11:19,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 12:11:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297015977] [2024-09-20 12:11:19,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:11:19,737 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 12:11:19,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 12:11:19,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:19,741 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:19,772 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-09-20 12:11:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 12:11:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-20 12:11:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:19,774 INFO L225 Difference]: With dead ends: 38 [2024-09-20 12:11:19,778 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 12:11:19,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:19,780 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:19,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 12:11:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2024-09-20 12:11:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:11:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-09-20 12:11:19,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2024-09-20 12:11:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:19,791 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-09-20 12:11:19,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:19,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-09-20 12:11:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 12:11:19,793 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:19,794 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:19,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:11:19,794 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:19,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1513968721, now seen corresponding path program 1 times [2024-09-20 12:11:19,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:19,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841041877] [2024-09-20 12:11:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:19,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:19,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:19,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841041877] [2024-09-20 12:11:19,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841041877] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:11:19,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:11:19,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 12:11:19,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781142142] [2024-09-20 12:11:19,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:11:19,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 12:11:19,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:19,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 12:11:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:19,908 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:19,922 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-09-20 12:11:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 12:11:19,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-20 12:11:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:19,924 INFO L225 Difference]: With dead ends: 37 [2024-09-20 12:11:19,924 INFO L226 Difference]: Without dead ends: 22 [2024-09-20 12:11:19,924 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:19,926 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:19,926 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-20 12:11:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-20 12:11:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:11:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-09-20 12:11:19,935 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2024-09-20 12:11:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:19,936 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-09-20 12:11:19,936 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:19,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-09-20 12:11:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 12:11:19,937 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:19,939 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:19,939 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:11:19,939 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:19,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash 337912467, now seen corresponding path program 1 times [2024-09-20 12:11:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663812434] [2024-09-20 12:11:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:19,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:20,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:20,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663812434] [2024-09-20 12:11:20,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663812434] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465073286] [2024-09-20 12:11:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:20,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:20,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:20,093 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) [2024-09-20 12:11:20,095 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:11:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:20,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:11:20,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:20,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:20,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465073286] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:20,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:20,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2024-09-20 12:11:20,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487900385] [2024-09-20 12:11:20,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:20,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:11:20,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:11:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:11:20,354 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:20,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:20,501 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2024-09-20 12:11:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:11:20,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 12:11:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:20,503 INFO L225 Difference]: With dead ends: 61 [2024-09-20 12:11:20,503 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 12:11:20,504 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:11:20,505 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:20,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 176 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:11:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 12:11:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2024-09-20 12:11:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:11:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-09-20 12:11:20,519 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 13 [2024-09-20 12:11:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:20,519 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-09-20 12:11:20,519 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:20,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-09-20 12:11:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:11:20,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:20,522 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:20,545 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 12:11:20,725 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:20,726 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:20,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash -304397137, now seen corresponding path program 2 times [2024-09-20 12:11:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225031774] [2024-09-20 12:11:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:20,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:20,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:20,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225031774] [2024-09-20 12:11:20,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225031774] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:20,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531312117] [2024-09-20 12:11:20,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:11:20,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:20,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:20,897 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) [2024-09-20 12:11:20,901 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:11:20,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:11:20,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:20,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 12:11:20,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:20,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:21,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531312117] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:21,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:21,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-20 12:11:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622747724] [2024-09-20 12:11:21,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:21,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 12:11:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 12:11:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:11:21,085 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2024-09-20 12:11:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:21,268 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2024-09-20 12:11:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 12:11:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 16 [2024-09-20 12:11:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:21,273 INFO L225 Difference]: With dead ends: 55 [2024-09-20 12:11:21,273 INFO L226 Difference]: Without dead ends: 31 [2024-09-20 12:11:21,274 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:11:21,275 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:21,275 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-20 12:11:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-20 12:11:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:11:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-20 12:11:21,288 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 16 [2024-09-20 12:11:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:21,288 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-20 12:11:21,288 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2024-09-20 12:11:21,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-20 12:11:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:11:21,289 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:21,289 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:21,305 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 12:11:21,490 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:21,490 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:21,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2050377169, now seen corresponding path program 3 times [2024-09-20 12:11:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:21,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073723173] [2024-09-20 12:11:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:21,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:21,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:21,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:21,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073723173] [2024-09-20 12:11:21,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073723173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:21,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117886125] [2024-09-20 12:11:21,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:11:21,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:21,747 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) [2024-09-20 12:11:21,750 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:11:21,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 12:11:21,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:21,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:11:21,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 12:11:22,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:11:22,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117886125] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:11:22,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:11:22,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2024-09-20 12:11:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937747592] [2024-09-20 12:11:22,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:11:22,098 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 12:11:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 12:11:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:11:22,100 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-09-20 12:11:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:22,208 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-09-20 12:11:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:11:22,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 22 [2024-09-20 12:11:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:22,210 INFO L225 Difference]: With dead ends: 38 [2024-09-20 12:11:22,210 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 12:11:22,210 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:11:22,211 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:22,211 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 12:11:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-09-20 12:11:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:11:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-09-20 12:11:22,221 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2024-09-20 12:11:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:22,222 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-09-20 12:11:22,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-09-20 12:11:22,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-09-20 12:11:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 12:11:22,223 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:22,223 INFO L216 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:22,239 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:11:22,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 12:11:22,424 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:22,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1587762515, now seen corresponding path program 1 times [2024-09-20 12:11:22,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:22,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51483734] [2024-09-20 12:11:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:22,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:22,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:22,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:11:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:22,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:22,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51483734] [2024-09-20 12:11:22,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51483734] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:22,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51781206] [2024-09-20 12:11:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:22,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:22,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:22,614 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) [2024-09-20 12:11:22,618 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:11:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:22,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:11:22,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 12:11:22,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 12:11:22,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51781206] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:22,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:22,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2024-09-20 12:11:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85598097] [2024-09-20 12:11:22,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:22,904 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:11:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:11:22,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:11:22,906 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:11:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:23,778 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2024-09-20 12:11:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-20 12:11:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-09-20 12:11:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:23,779 INFO L225 Difference]: With dead ends: 110 [2024-09-20 12:11:23,779 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 12:11:23,781 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2024-09-20 12:11:23,782 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:23,782 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 269 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:11:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 12:11:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-20 12:11:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:11:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-09-20 12:11:23,803 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 29 [2024-09-20 12:11:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:23,803 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-09-20 12:11:23,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:11:23,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-09-20 12:11:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 12:11:23,806 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:23,806 INFO L216 NwaCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:23,822 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:11:24,006 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 [2024-09-20 12:11:24,007 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:24,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1307739729, now seen corresponding path program 2 times [2024-09-20 12:11:24,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:24,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760923126] [2024-09-20 12:11:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:24,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:24,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:24,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 12:11:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:24,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 12:11:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:24,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 12:11:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:24,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 12:11:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-20 12:11:24,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:24,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760923126] [2024-09-20 12:11:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760923126] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:24,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064000392] [2024-09-20 12:11:24,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:11:24,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:24,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:24,372 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) [2024-09-20 12:11:24,373 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:11:24,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:11:24,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:24,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 12:11:24,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-09-20 12:11:24,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-09-20 12:11:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064000392] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:25,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:25,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2024-09-20 12:11:25,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515029817] [2024-09-20 12:11:25,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:25,216 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 12:11:25,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 12:11:25,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 12:11:25,219 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:11:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:29,184 INFO L93 Difference]: Finished difference Result 256 states and 302 transitions. [2024-09-20 12:11:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-09-20 12:11:29,185 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 87 [2024-09-20 12:11:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:29,186 INFO L225 Difference]: With dead ends: 256 [2024-09-20 12:11:29,187 INFO L226 Difference]: Without dead ends: 181 [2024-09-20 12:11:29,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8825 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2024-09-20 12:11:29,196 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 97 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:29,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 537 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:11:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-20 12:11:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-09-20 12:11:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 164 states have internal predecessors, (176), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 12:11:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 202 transitions. [2024-09-20 12:11:29,230 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 202 transitions. Word has length 87 [2024-09-20 12:11:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:29,231 INFO L474 AbstractCegarLoop]: Abstraction has 181 states and 202 transitions. [2024-09-20 12:11:29,231 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:11:29,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 202 transitions. [2024-09-20 12:11:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-09-20 12:11:29,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:29,237 INFO L216 NwaCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:29,254 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:11:29,438 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 [2024-09-20 12:11:29,438 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:29,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:29,439 INFO L85 PathProgramCache]: Analyzing trace with hash 709816549, now seen corresponding path program 3 times [2024-09-20 12:11:29,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:29,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278872017] [2024-09-20 12:11:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:29,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:11:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 12:11:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 12:11:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 12:11:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-20 12:11:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-09-20 12:11:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-20 12:11:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-09-20 12:11:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-20 12:11:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2024-09-20 12:11:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2024-09-20 12:11:30,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278872017] [2024-09-20 12:11:30,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278872017] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954862199] [2024-09-20 12:11:30,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:11:30,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:30,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:30,220 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) [2024-09-20 12:11:30,222 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:11:30,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-20 12:11:30,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:30,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 12:11:30,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1447 proven. 1548 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2024-09-20 12:11:30,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1569 proven. 78 refuted. 0 times theorem prover too weak. 7083 trivial. 0 not checked. [2024-09-20 12:11:30,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954862199] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:30,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:30,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-20 12:11:30,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250373106] [2024-09-20 12:11:30,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:30,799 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 12:11:30,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:30,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 12:11:30,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2024-09-20 12:11:30,800 INFO L87 Difference]: Start difference. First operand 181 states and 202 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:11:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:35,586 INFO L93 Difference]: Finished difference Result 496 states and 678 transitions. [2024-09-20 12:11:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 12:11:35,587 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 211 [2024-09-20 12:11:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:35,589 INFO L225 Difference]: With dead ends: 496 [2024-09-20 12:11:35,589 INFO L226 Difference]: Without dead ends: 321 [2024-09-20 12:11:35,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 12:11:35,592 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:35,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 306 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:11:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-09-20 12:11:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2024-09-20 12:11:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 303 states have (on average 1.0429042904290429) internal successors, (316), 304 states have internal predecessors, (316), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 12:11:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 342 transitions. [2024-09-20 12:11:35,648 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 342 transitions. Word has length 211 [2024-09-20 12:11:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:35,650 INFO L474 AbstractCegarLoop]: Abstraction has 321 states and 342 transitions. [2024-09-20 12:11:35,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:11:35,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 342 transitions. [2024-09-20 12:11:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-09-20 12:11:35,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:35,658 INFO L216 NwaCegarLoop]: trace histogram [260, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:35,674 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 12:11:35,861 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 [2024-09-20 12:11:35,862 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:35,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash -434978715, now seen corresponding path program 4 times [2024-09-20 12:11:35,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:35,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205474579] [2024-09-20 12:11:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:35,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:11:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:11:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-20 12:11:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-20 12:11:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2024-09-20 12:11:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2024-09-20 12:11:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2024-09-20 12:11:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2024-09-20 12:11:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2024-09-20 12:11:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2024-09-20 12:11:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 6591 proven. 351 refuted. 0 times theorem prover too weak. 29718 trivial. 0 not checked. [2024-09-20 12:11:37,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205474579] [2024-09-20 12:11:37,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205474579] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584818901] [2024-09-20 12:11:37,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:11:37,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:37,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:37,680 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) [2024-09-20 12:11:37,681 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:11:37,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:11:37,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:37,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 12:11:37,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 20 proven. 33181 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2024-09-20 12:11:38,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 196 proven. 33005 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2024-09-20 12:11:40,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584818901] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:40,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:40,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 73 [2024-09-20 12:11:40,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420033343] [2024-09-20 12:11:40,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:40,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-20 12:11:40,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-20 12:11:40,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2024-09-20 12:11:40,328 INFO L87 Difference]: Start difference. First operand 321 states and 342 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-20 12:13:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:13:54,984 INFO L93 Difference]: Finished difference Result 1018 states and 1118 transitions. [2024-09-20 12:13:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 628 states. [2024-09-20 12:13:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 351 [2024-09-20 12:13:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:13:54,989 INFO L225 Difference]: With dead ends: 1018 [2024-09-20 12:13:54,989 INFO L226 Difference]: Without dead ends: 703 [2024-09-20 12:13:55,018 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 674 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196022 ImplicationChecksByTransitivity, 132.1s TimeCoverageRelationStatistics Valid=29805, Invalid=426495, Unknown=0, NotChecked=0, Total=456300 [2024-09-20 12:13:55,019 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 396 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 11787 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 11823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 11787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:13:55,019 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 870 Invalid, 11823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 11787 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-09-20 12:13:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2024-09-20 12:13:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2024-09-20 12:13:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 673 states have (on average 1.037147102526003) internal successors, (698), 674 states have internal predecessors, (698), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-20 12:13:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 748 transitions. [2024-09-20 12:13:55,125 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 748 transitions. Word has length 351 [2024-09-20 12:13:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:13:55,126 INFO L474 AbstractCegarLoop]: Abstraction has 703 states and 748 transitions. [2024-09-20 12:13:55,126 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-20 12:13:55,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:13:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 748 transitions. [2024-09-20 12:13:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2024-09-20 12:13:55,142 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:13:55,143 INFO L216 NwaCegarLoop]: trace histogram [594, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:13:55,162 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 12:13:55,346 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 [2024-09-20 12:13:55,347 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:13:55,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:13:55,347 INFO L85 PathProgramCache]: Analyzing trace with hash 674821009, now seen corresponding path program 5 times [2024-09-20 12:13:55,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:13:55,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102302932] [2024-09-20 12:13:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:13:55,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:13:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:13:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 12:13:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 12:13:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-20 12:13:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-20 12:13:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2024-09-20 12:13:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2024-09-20 12:13:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2024-09-20 12:13:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2024-09-20 12:13:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2024-09-20 12:13:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2024-09-20 12:13:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 385 [2024-09-20 12:13:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2024-09-20 12:13:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2024-09-20 12:13:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2024-09-20 12:13:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 525 [2024-09-20 12:13:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2024-09-20 12:13:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2024-09-20 12:13:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2024-09-20 12:13:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 665 [2024-09-20 12:13:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2024-09-20 12:13:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 735 [2024-09-20 12:13:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 770 [2024-09-20 12:13:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:13:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 16530 proven. 378 refuted. 0 times theorem prover too weak. 174195 trivial. 0 not checked. [2024-09-20 12:13:59,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:13:59,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102302932] [2024-09-20 12:13:59,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102302932] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:13:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187347328] [2024-09-20 12:13:59,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:13:59,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:13:59,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:13:59,288 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) [2024-09-20 12:13:59,289 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:14:04,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-09-20 12:14:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:14:04,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 12:14:04,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:14:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 59224 proven. 378 refuted. 0 times theorem prover too weak. 131501 trivial. 0 not checked. [2024-09-20 12:14:04,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:14:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 59034 proven. 378 refuted. 0 times theorem prover too weak. 131691 trivial. 0 not checked. [2024-09-20 12:14:06,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187347328] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:14:06,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:14:06,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2024-09-20 12:14:06,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953985019] [2024-09-20 12:14:06,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:14:06,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-20 12:14:06,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:14:06,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-20 12:14:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=2467, Unknown=0, NotChecked=0, Total=3422 [2024-09-20 12:14:06,027 INFO L87 Difference]: Start difference. First operand 703 states and 748 transitions. Second operand has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:14:12,023 WARN L293 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 114 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)