./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.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/mono-crafted_6.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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --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 12:10:59,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:10:59,900 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:10:59,904 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:10:59,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:10:59,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:10:59,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:10:59,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:10:59,944 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:10:59,944 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:10:59,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:10:59,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:10:59,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:10:59,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:10:59,945 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:10:59,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:10:59,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:10:59,948 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:10:59,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:10:59,949 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:10:59,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:10:59,949 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:10:59,949 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:10:59,950 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:10:59,950 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:10:59,950 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:10:59,950 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:10:59,950 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:10:59,951 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:10:59,951 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:10:59,951 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:10:59,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:10:59,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:10:59,952 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:10:59,952 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:10:59,952 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:10:59,952 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:10:59,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:10:59,953 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:10:59,953 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:10:59,957 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:10:59,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:10:59,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:11:00,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:11:00,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:11:00,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:11:00,238 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:11:00,239 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:11:00,240 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2024-09-20 12:11:01,546 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:11:01,726 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:11:01,727 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2024-09-20 12:11:01,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0c10b9872/dc94005d94304e06a8e634fb19123473/FLAG0388cd55b [2024-09-20 12:11:01,748 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0c10b9872/dc94005d94304e06a8e634fb19123473 [2024-09-20 12:11:01,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:11:01,752 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:11:01,754 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:11:01,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:11:01,759 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:11:01,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:01,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350353a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01, skipping insertion in model container [2024-09-20 12:11:01,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:01,778 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:11:01,918 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/mono-crafted_6.c[318,331] [2024-09-20 12:11:01,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:11:01,938 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:11:01,946 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/mono-crafted_6.c[318,331] [2024-09-20 12:11:01,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:11:01,964 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:11:01,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01 WrapperNode [2024-09-20 12:11:01,965 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:11:01,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:11:01,966 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:11:01,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:11:01,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:01,978 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:01,984 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:11:01,984 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:11:01,985 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:11:01,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:11:01,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:11:01,995 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:01,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:01,997 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:02,007 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 12:11:02,007 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:02,008 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:02,009 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:02,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:02,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:02,013 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:02,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:11:02,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:11:02,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:11:02,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:11:02,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (1/1) ... [2024-09-20 12:11:02,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:11:02,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:02,050 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 12:11:02,057 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 12:11:02,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:11:02,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:11:02,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:11:02,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:11:02,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:11:02,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:11:02,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:11:02,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:11:02,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:11:02,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:11:02,152 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:11:02,154 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:11:02,338 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:11:02,339 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:11:02,356 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:11:02,356 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 12:11:02,356 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:11:02 BoogieIcfgContainer [2024-09-20 12:11:02,357 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:11:02,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:11:02,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:11:02,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:11:02,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:11:01" (1/3) ... [2024-09-20 12:11:02,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a760be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:11:02, skipping insertion in model container [2024-09-20 12:11:02,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:01" (2/3) ... [2024-09-20 12:11:02,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a760be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:11:02, skipping insertion in model container [2024-09-20 12:11:02,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:11:02" (3/3) ... [2024-09-20 12:11:02,365 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2024-09-20 12:11:02,381 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:11:02,382 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:11:02,434 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:11:02,440 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;@2570cb13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:11:02,440 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:11:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:11:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-20 12:11:02,451 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:02,452 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:02,452 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:02,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2037564162, now seen corresponding path program 1 times [2024-09-20 12:11:02,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:02,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688280946] [2024-09-20 12:11:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:02,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:02,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:02,632 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 12:11:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688280946] [2024-09-20 12:11:02,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688280946] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:11:02,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:11:02,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 12:11:02,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608006118] [2024-09-20 12:11:02,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:11:02,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 12:11:02,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:02,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 12:11:02,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:02,667 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:02,704 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2024-09-20 12:11:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 12:11:02,706 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 12:11:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:02,711 INFO L225 Difference]: With dead ends: 37 [2024-09-20 12:11:02,711 INFO L226 Difference]: Without dead ends: 16 [2024-09-20 12:11:02,714 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 12:11:02,719 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:02,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-20 12:11:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-20 12:11:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-20 12:11:02,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-09-20 12:11:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:02,759 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-20 12:11:02,759 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 12:11:02,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-20 12:11:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 12:11:02,760 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:02,760 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:02,760 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:11:02,760 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:02,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:02,761 INFO L85 PathProgramCache]: Analyzing trace with hash 432983647, now seen corresponding path program 1 times [2024-09-20 12:11:02,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:02,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679174900] [2024-09-20 12:11:02,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:02,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:02,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:02,890 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 12:11:02,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679174900] [2024-09-20 12:11:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679174900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198083662] [2024-09-20 12:11:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:02,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:02,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:02,897 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 12:11:02,898 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 12:11:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:02,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 12:11:02,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:02,981 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 12:11:02,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:03,020 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 12:11:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198083662] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:03,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:03,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-20 12:11:03,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447394666] [2024-09-20 12:11:03,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:03,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:11:03,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:03,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:11:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:11:03,024 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 12:11:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:03,078 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-09-20 12:11:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:11:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 12:11:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:03,081 INFO L225 Difference]: With dead ends: 31 [2024-09-20 12:11:03,081 INFO L226 Difference]: Without dead ends: 22 [2024-09-20 12:11:03,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:11:03,084 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:03,085 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-20 12:11:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-09-20 12:11:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-09-20 12:11:03,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-09-20 12:11:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:03,094 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-09-20 12:11:03,094 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 12:11:03,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-09-20 12:11:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 12:11:03,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:03,095 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:03,112 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:11:03,295 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:03,296 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:03,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:03,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1116068651, now seen corresponding path program 1 times [2024-09-20 12:11:03,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:03,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737642066] [2024-09-20 12:11:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:03,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:03,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:03,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:03,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737642066] [2024-09-20 12:11:03,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737642066] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:03,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562833455] [2024-09-20 12:11:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:03,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:03,415 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 12:11:03,417 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 12:11:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:03,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 12:11:03,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:03,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:03,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562833455] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:03,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:03,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-20 12:11:03,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340796900] [2024-09-20 12:11:03,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:03,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:11:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:11:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:11:03,562 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 12:11:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:03,621 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-20 12:11:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:11:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 18 [2024-09-20 12:11:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:03,622 INFO L225 Difference]: With dead ends: 44 [2024-09-20 12:11:03,622 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 12:11:03,623 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:11:03,623 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:03,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 12:11:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-20 12:11:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-09-20 12:11:03,630 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 18 [2024-09-20 12:11:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:03,634 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-09-20 12:11:03,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 12:11:03,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-09-20 12:11:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 12:11:03,635 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:03,636 INFO L216 NwaCegarLoop]: trace histogram [7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:03,649 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 12:11:03,836 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:03,837 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:03,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1180634569, now seen corresponding path program 1 times [2024-09-20 12:11:03,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:03,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557361384] [2024-09-20 12:11:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:03,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:03,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 12:11:03,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:03,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557361384] [2024-09-20 12:11:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557361384] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409159322] [2024-09-20 12:11:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:03,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:03,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:03,978 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 12:11:03,982 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 12:11:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:04,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 12:11:04,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 12:11:04,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 12:11:04,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409159322] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:04,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:04,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-20 12:11:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64229515] [2024-09-20 12:11:04,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:04,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:11:04,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:11:04,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:11:04,157 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:04,205 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2024-09-20 12:11:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 12:11:04,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-20 12:11:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:04,207 INFO L225 Difference]: With dead ends: 65 [2024-09-20 12:11:04,207 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 12:11:04,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:11:04,208 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:04,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 12:11:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-20 12:11:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-09-20 12:11:04,220 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 32 [2024-09-20 12:11:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:04,220 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-09-20 12:11:04,221 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:04,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-09-20 12:11:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:11:04,222 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:04,222 INFO L216 NwaCegarLoop]: trace histogram [12, 8, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:04,239 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 12:11:04,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:04,423 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:04,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 990963656, now seen corresponding path program 2 times [2024-09-20 12:11:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334458647] [2024-09-20 12:11:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:04,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 12:11:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:04,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334458647] [2024-09-20 12:11:04,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334458647] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791935852] [2024-09-20 12:11:04,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:11:04,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:04,664 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 12:11:04,668 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 12:11:04,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:11:04,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:04,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 12:11:04,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 12:11:04,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 12:11:04,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791935852] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:04,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:04,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-20 12:11:04,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600844574] [2024-09-20 12:11:04,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:04,946 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:11:04,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:04,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:11:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:11:04,948 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 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 12:11:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:05,017 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2024-09-20 12:11:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:11:05,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-20 12:11:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:05,018 INFO L225 Difference]: With dead ends: 85 [2024-09-20 12:11:05,018 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 12:11:05,019 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:11:05,020 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:05,020 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:11:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 12:11:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 12:11:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-09-20 12:11:05,036 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 42 [2024-09-20 12:11:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:05,039 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-09-20 12:11:05,039 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 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 12:11:05,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-09-20 12:11:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 12:11:05,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:05,040 INFO L216 NwaCegarLoop]: trace histogram [22, 18, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:05,053 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 12:11:05,244 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:05,245 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:05,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash 736255786, now seen corresponding path program 3 times [2024-09-20 12:11:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:05,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551223621] [2024-09-20 12:11:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:05,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 12:11:05,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:05,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551223621] [2024-09-20 12:11:05,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551223621] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:05,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861684441] [2024-09-20 12:11:05,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:11:05,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:05,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:05,669 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 12:11:05,670 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 12:11:05,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:11:05,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:05,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 12:11:05,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-09-20 12:11:05,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-09-20 12:11:05,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861684441] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:05,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:05,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 25 [2024-09-20 12:11:05,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181842260] [2024-09-20 12:11:05,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:05,801 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 12:11:05,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:05,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 12:11:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:11:05,803 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 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 12:11:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:05,886 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2024-09-20 12:11:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 12:11:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2024-09-20 12:11:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:05,888 INFO L225 Difference]: With dead ends: 99 [2024-09-20 12:11:05,888 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 12:11:05,888 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:11:05,889 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:05,889 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:11:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 12:11:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 12:11:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2024-09-20 12:11:05,899 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 62 [2024-09-20 12:11:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:05,899 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2024-09-20 12:11:05,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 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 12:11:05,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2024-09-20 12:11:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-20 12:11:05,901 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:05,901 INFO L216 NwaCegarLoop]: trace histogram [26, 19, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:05,917 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 12:11:06,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 12:11:06,102 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:06,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:06,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1584478994, now seen corresponding path program 4 times [2024-09-20 12:11:06,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:06,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350363634] [2024-09-20 12:11:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:06,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:06,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 12:11:06,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350363634] [2024-09-20 12:11:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350363634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472644125] [2024-09-20 12:11:06,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:11:06,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:06,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:06,625 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 12:11:06,640 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 12:11:06,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:11:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:06,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 12:11:06,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 12:11:06,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 12:11:07,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472644125] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:07,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:07,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2024-09-20 12:11:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779864007] [2024-09-20 12:11:07,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:07,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-20 12:11:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-20 12:11:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 12:11:07,383 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 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 12:11:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:07,489 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2024-09-20 12:11:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 12:11:07,490 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 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 76 [2024-09-20 12:11:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:07,491 INFO L225 Difference]: With dead ends: 153 [2024-09-20 12:11:07,491 INFO L226 Difference]: Without dead ends: 119 [2024-09-20 12:11:07,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 12:11:07,492 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:07,493 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:11:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-20 12:11:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-09-20 12:11:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2024-09-20 12:11:07,519 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 76 [2024-09-20 12:11:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:07,519 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2024-09-20 12:11:07,519 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 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 12:11:07,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2024-09-20 12:11:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-20 12:11:07,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:07,521 INFO L216 NwaCegarLoop]: trace histogram [47, 40, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:07,541 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 12:11:07,722 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:07,722 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:07,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:07,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1073042163, now seen corresponding path program 5 times [2024-09-20 12:11:07,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:07,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198354487] [2024-09-20 12:11:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:07,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:09,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 533 proven. 1640 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 12:11:09,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:09,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198354487] [2024-09-20 12:11:09,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198354487] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:09,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250511433] [2024-09-20 12:11:09,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:11:09,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:09,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:09,146 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 12:11:09,147 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 12:11:09,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2024-09-20 12:11:09,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:09,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 12:11:09,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1292 proven. 389 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2024-09-20 12:11:10,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1292 proven. 389 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2024-09-20 12:11:10,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250511433] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:10,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:10,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 22, 22] total 83 [2024-09-20 12:11:10,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932437970] [2024-09-20 12:11:10,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:10,936 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-09-20 12:11:10,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-09-20 12:11:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2024-09-20 12:11:10,940 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 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 12:11:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:11,347 INFO L93 Difference]: Finished difference Result 303 states and 400 transitions. [2024-09-20 12:11:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-20 12:11:11,351 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 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 118 [2024-09-20 12:11:11,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:11,353 INFO L225 Difference]: With dead ends: 303 [2024-09-20 12:11:11,353 INFO L226 Difference]: Without dead ends: 269 [2024-09-20 12:11:11,355 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2024-09-20 12:11:11,355 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 137 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:11,356 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 66 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:11:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-09-20 12:11:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2024-09-20 12:11:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.1856060606060606) internal successors, (313), 264 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 317 transitions. [2024-09-20 12:11:11,391 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 317 transitions. Word has length 118 [2024-09-20 12:11:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:11,391 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 317 transitions. [2024-09-20 12:11:11,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 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 12:11:11,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 317 transitions. [2024-09-20 12:11:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2024-09-20 12:11:11,398 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:11,398 INFO L216 NwaCegarLoop]: trace histogram [85, 44, 44, 41, 40, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:11,411 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 12:11:11,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:11,599 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:11,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2107848675, now seen corresponding path program 6 times [2024-09-20 12:11:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:11,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994215739] [2024-09-20 12:11:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:11,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 3654 proven. 1722 refuted. 0 times theorem prover too weak. 3741 trivial. 0 not checked. [2024-09-20 12:11:13,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994215739] [2024-09-20 12:11:13,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994215739] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579084980] [2024-09-20 12:11:13,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:11:13,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:13,324 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 12:11:13,325 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 12:11:13,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-20 12:11:13,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:13,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:11:13,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 1084 proven. 32 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2024-09-20 12:11:13,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 1084 proven. 32 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2024-09-20 12:11:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579084980] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:13,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 7, 7] total 54 [2024-09-20 12:11:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562044757] [2024-09-20 12:11:13,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:13,777 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-20 12:11:13,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-20 12:11:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 12:11:13,780 INFO L87 Difference]: Start difference. First operand 269 states and 317 transitions. Second operand has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 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 12:11:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:13,936 INFO L93 Difference]: Finished difference Result 477 states and 592 transitions. [2024-09-20 12:11:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-20 12:11:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 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 268 [2024-09-20 12:11:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:13,938 INFO L225 Difference]: With dead ends: 477 [2024-09-20 12:11:13,939 INFO L226 Difference]: Without dead ends: 295 [2024-09-20 12:11:13,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 12:11:13,943 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:13,943 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:11:13,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-09-20 12:11:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2024-09-20 12:11:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.210344827586207) internal successors, (351), 290 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:13,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 355 transitions. [2024-09-20 12:11:13,966 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 355 transitions. Word has length 268 [2024-09-20 12:11:13,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:13,966 INFO L474 AbstractCegarLoop]: Abstraction has 295 states and 355 transitions. [2024-09-20 12:11:13,967 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 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 12:11:13,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 355 transitions. [2024-09-20 12:11:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2024-09-20 12:11:13,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:13,969 INFO L216 NwaCegarLoop]: trace histogram [92, 50, 50, 42, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:13,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 12:11:14,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:14,171 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:14,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1689622166, now seen corresponding path program 7 times [2024-09-20 12:11:14,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:14,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690353503] [2024-09-20 12:11:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:14,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:15,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-20 12:11:15,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690353503] [2024-09-20 12:11:15,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690353503] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964009302] [2024-09-20 12:11:15,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:11:15,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:15,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:15,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:11:15,910 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:11:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:16,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-20 12:11:16,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-20 12:11:16,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-20 12:11:17,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964009302] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:17,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:17,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 89 [2024-09-20 12:11:17,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242681776] [2024-09-20 12:11:17,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:17,982 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-09-20 12:11:17,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-09-20 12:11:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2024-09-20 12:11:17,986 INFO L87 Difference]: Start difference. First operand 295 states and 355 transitions. Second operand has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 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 12:11:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:18,241 INFO L93 Difference]: Finished difference Result 589 states and 753 transitions. [2024-09-20 12:11:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-20 12:11:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 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 294 [2024-09-20 12:11:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:18,244 INFO L225 Difference]: With dead ends: 589 [2024-09-20 12:11:18,244 INFO L226 Difference]: Without dead ends: 383 [2024-09-20 12:11:18,246 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2024-09-20 12:11:18,247 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:18,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:11:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-09-20 12:11:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2024-09-20 12:11:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.1613756613756614) internal successors, (439), 378 states have internal predecessors, (439), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 443 transitions. [2024-09-20 12:11:18,280 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 443 transitions. Word has length 294 [2024-09-20 12:11:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:18,280 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 443 transitions. [2024-09-20 12:11:18,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 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 12:11:18,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 443 transitions. [2024-09-20 12:11:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2024-09-20 12:11:18,285 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:18,285 INFO L216 NwaCegarLoop]: trace histogram [136, 86, 50, 50, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:18,298 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 12:11:18,489 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 12:11:18,490 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:18,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash -979945966, now seen corresponding path program 8 times [2024-09-20 12:11:18,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:18,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085915319] [2024-09-20 12:11:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:18,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:23,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-20 12:11:23,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:23,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085915319] [2024-09-20 12:11:23,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085915319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:23,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516210153] [2024-09-20 12:11:23,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:11:23,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:23,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:23,948 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:11:23,948 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:11:24,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:11:24,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:24,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-09-20 12:11:24,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-20 12:11:24,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-20 12:11:30,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516210153] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:30,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:30,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 177 [2024-09-20 12:11:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450635758] [2024-09-20 12:11:30,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:30,697 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2024-09-20 12:11:30,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2024-09-20 12:11:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2024-09-20 12:11:30,707 INFO L87 Difference]: Start difference. First operand 383 states and 443 transitions. Second operand has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 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 12:11:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:31,237 INFO L93 Difference]: Finished difference Result 765 states and 973 transitions. [2024-09-20 12:11:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2024-09-20 12:11:31,238 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 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 382 [2024-09-20 12:11:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:31,240 INFO L225 Difference]: With dead ends: 765 [2024-09-20 12:11:31,240 INFO L226 Difference]: Without dead ends: 559 [2024-09-20 12:11:31,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2024-09-20 12:11:31,245 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:31,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:11:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2024-09-20 12:11:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2024-09-20 12:11:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 554 states have (on average 1.1101083032490975) internal successors, (615), 554 states have internal predecessors, (615), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 619 transitions. [2024-09-20 12:11:31,269 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 619 transitions. Word has length 382 [2024-09-20 12:11:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:31,269 INFO L474 AbstractCegarLoop]: Abstraction has 559 states and 619 transitions. [2024-09-20 12:11:31,270 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 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 12:11:31,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 619 transitions. [2024-09-20 12:11:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2024-09-20 12:11:31,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:31,288 INFO L216 NwaCegarLoop]: trace histogram [224, 174, 50, 50, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:31,303 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 12:11:31,488 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 12:11:31,489 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:31,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1825683722, now seen corresponding path program 9 times [2024-09-20 12:11:31,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:31,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099516636] [2024-09-20 12:11:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:53,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 17325 proven. 30450 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-20 12:11:53,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099516636] [2024-09-20 12:11:53,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099516636] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391529643] [2024-09-20 12:11:53,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:11:53,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:53,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:53,800 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:11:53,801 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:11:53,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-20 12:11:53,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:53,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 12:11:53,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 5323 proven. 200 refuted. 0 times theorem prover too weak. 47103 trivial. 0 not checked. [2024-09-20 12:11:55,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 5323 proven. 200 refuted. 0 times theorem prover too weak. 47103 trivial. 0 not checked. [2024-09-20 12:11:56,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391529643] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:56,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:56,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [177, 13, 13] total 199 [2024-09-20 12:11:56,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579862208] [2024-09-20 12:11:56,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:56,123 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2024-09-20 12:11:56,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:56,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2024-09-20 12:11:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2024-09-20 12:11:56,129 INFO L87 Difference]: Start difference. First operand 559 states and 619 transitions. Second operand has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 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 12:11:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:57,181 INFO L93 Difference]: Finished difference Result 815 states and 972 transitions. [2024-09-20 12:11:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2024-09-20 12:11:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 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 558 [2024-09-20 12:11:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:57,187 INFO L225 Difference]: With dead ends: 815 [2024-09-20 12:11:57,187 INFO L226 Difference]: Without dead ends: 609 [2024-09-20 12:11:57,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1097 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2024-09-20 12:11:57,190 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:57,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:11:57,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2024-09-20 12:11:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2024-09-20 12:11:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 604 states have (on average 1.140728476821192) internal successors, (689), 604 states have internal predecessors, (689), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 693 transitions. [2024-09-20 12:11:57,214 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 693 transitions. Word has length 558 [2024-09-20 12:11:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:57,215 INFO L474 AbstractCegarLoop]: Abstraction has 609 states and 693 transitions. [2024-09-20 12:11:57,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 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 12:11:57,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 693 transitions. [2024-09-20 12:11:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2024-09-20 12:11:57,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:57,218 INFO L216 NwaCegarLoop]: trace histogram [237, 175, 62, 62, 40, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:57,230 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 12:11:57,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:57,419 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:57,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1149410067, now seen corresponding path program 10 times [2024-09-20 12:11:57,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:57,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38874349] [2024-09-20 12:11:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:57,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:12:20,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:12:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:12:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-20 12:12:20,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:12:20,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38874349] [2024-09-20 12:12:20,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38874349] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:12:20,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906083958] [2024-09-20 12:12:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:12:20,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:12:20,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:12:20,559 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:12:20,560 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:12:20,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:12:20,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:12:20,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 352 conjuncts are in the unsatisfiable core [2024-09-20 12:12:20,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:12:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-20 12:12:21,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:12:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-20 12:12:44,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906083958] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:12:44,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:12:44,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [178, 178, 178] total 355 [2024-09-20 12:12:44,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894862760] [2024-09-20 12:12:44,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:12:44,731 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 355 states [2024-09-20 12:12:44,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:12:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 355 interpolants. [2024-09-20 12:12:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62835, Invalid=62835, Unknown=0, NotChecked=0, Total=125670 [2024-09-20 12:12:44,747 INFO L87 Difference]: Start difference. First operand 609 states and 693 transitions. Second operand has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 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 12:12:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:12:47,496 INFO L93 Difference]: Finished difference Result 1217 states and 1562 transitions. [2024-09-20 12:12:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2024-09-20 12:12:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 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 608 [2024-09-20 12:12:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:12:47,501 INFO L225 Difference]: With dead ends: 1217 [2024-09-20 12:12:47,501 INFO L226 Difference]: Without dead ends: 963 [2024-09-20 12:12:47,505 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=62835, Invalid=62835, Unknown=0, NotChecked=0, Total=125670 [2024-09-20 12:12:47,505 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:12:47,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:12:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2024-09-20 12:12:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2024-09-20 12:12:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.0887265135699373) internal successors, (1043), 958 states have internal predecessors, (1043), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:12:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1047 transitions. [2024-09-20 12:12:47,574 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1047 transitions. Word has length 608 [2024-09-20 12:12:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:12:47,575 INFO L474 AbstractCegarLoop]: Abstraction has 963 states and 1047 transitions. [2024-09-20 12:12:47,575 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 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 12:12:47,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:12:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1047 transitions. [2024-09-20 12:12:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2024-09-20 12:12:47,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:12:47,581 INFO L216 NwaCegarLoop]: trace histogram [414, 352, 62, 62, 40, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:12:47,595 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 12:12:47,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 12:12:47,782 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:12:47,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:12:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 222980256, now seen corresponding path program 11 times [2024-09-20 12:12:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:12:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150482897] [2024-09-20 12:12:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:12:47,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:12:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:48,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:14:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 175178 backedges. 43419 proven. 124256 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-20 12:14:48,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:14:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150482897] [2024-09-20 12:14:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150482897] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:14:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472080268] [2024-09-20 12:14:48,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:14:48,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:48,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:14:48,128 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:14:48,132 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 12:14:51,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 372 check-sat command(s) [2024-09-20 12:14:51,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:14:51,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 2275 conjuncts, 334 conjuncts are in the unsatisfiable core [2024-09-20 12:14:51,296 INFO L285 TraceCheckSpWp]: Computing forward predicates...