./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.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 ca4ee3dd 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_9.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 c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 --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-ca4ee3d-m [2024-09-20 18:55:05,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:55:05,926 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:55:05,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:55:05,931 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:55:05,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:55:05,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:55:05,954 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:55:05,954 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:55:05,957 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:55:05,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:55:05,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:55:05,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:55:05,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:55:05,958 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:55:05,958 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:55:05,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:55:05,959 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:55:05,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:55:05,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:55:05,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:55:05,960 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:55:05,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:55:05,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:55:05,960 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:55:05,960 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:55:05,960 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:55:05,961 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:55:05,961 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:55:05,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:55:05,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:55:05,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:55:05,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:55:05,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:55:05,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:55:05,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:55:05,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:55:05,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:55:05,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:55:05,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:55:05,963 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:55:05,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:55:05,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:55:06,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:55:06,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:55:06,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:55:06,167 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:55:06,168 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:55:06,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2024-09-20 18:55:07,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:55:07,556 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:55:07,556 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2024-09-20 18:55:07,561 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f3a22da57/8fbfbcfc98164be882468d2dbe2296f7/FLAGe816300b8 [2024-09-20 18:55:07,989 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f3a22da57/8fbfbcfc98164be882468d2dbe2296f7 [2024-09-20 18:55:07,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:55:07,992 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:55:07,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:55:07,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:55:08,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:55:08,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:55:07" (1/1) ... [2024-09-20 18:55:08,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216851fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08, skipping insertion in model container [2024-09-20 18:55:08,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:55:07" (1/1) ... [2024-09-20 18:55:08,015 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:55:08,122 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_9.c[318,331] [2024-09-20 18:55:08,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:55:08,138 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:55:08,146 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_9.c[318,331] [2024-09-20 18:55:08,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:55:08,180 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:55:08,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08 WrapperNode [2024-09-20 18:55:08,184 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:55:08,185 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:55:08,185 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:55:08,185 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:55:08,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,210 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:55:08,211 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:55:08,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:55:08,212 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:55:08,212 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:55:08,218 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,220 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,227 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 18:55:08,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,230 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,235 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,236 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:55:08,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:55:08,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:55:08,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:55:08,239 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (1/1) ... [2024-09-20 18:55:08,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:55:08,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:08,264 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 18:55:08,273 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 18:55:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:55:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:55:08,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:55:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:55:08,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:55:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:55:08,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:55:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:55:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:55:08,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:55:08,347 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:55:08,349 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:55:08,421 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-09-20 18:55:08,421 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:55:08,434 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:55:08,434 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 18:55:08,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:55:08 BoogieIcfgContainer [2024-09-20 18:55:08,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:55:08,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:55:08,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:55:08,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:55:08,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:55:07" (1/3) ... [2024-09-20 18:55:08,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b5f0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:55:08, skipping insertion in model container [2024-09-20 18:55:08,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:55:08" (2/3) ... [2024-09-20 18:55:08,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b5f0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:55:08, skipping insertion in model container [2024-09-20 18:55:08,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:55:08" (3/3) ... [2024-09-20 18:55:08,440 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2024-09-20 18:55:08,450 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:55:08,450 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:55:08,498 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:55:08,504 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;@2f2d33d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:55:08,505 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:55:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 18:55:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-20 18:55:08,512 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:08,513 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:08,513 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:08,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:08,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1957128844, now seen corresponding path program 1 times [2024-09-20 18:55:08,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:08,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53711304] [2024-09-20 18:55:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:08,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:08,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:08,651 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 18:55:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53711304] [2024-09-20 18:55:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53711304] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:55:08,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:55:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 18:55:08,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420150329] [2024-09-20 18:55:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:55:08,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 18:55:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 18:55:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:55:08,691 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 18:55:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:08,711 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-09-20 18:55:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 18:55:08,713 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 18:55:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:08,717 INFO L225 Difference]: With dead ends: 29 [2024-09-20 18:55:08,717 INFO L226 Difference]: Without dead ends: 12 [2024-09-20 18:55:08,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:55:08,722 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:08,724 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:55:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-20 18:55:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-20 18:55:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 18:55:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-09-20 18:55:08,747 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2024-09-20 18:55:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:08,748 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-09-20 18:55:08,748 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 18:55:08,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-09-20 18:55:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-20 18:55:08,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:08,750 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:08,750 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:55:08,750 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:08,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1947893634, now seen corresponding path program 1 times [2024-09-20 18:55:08,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:08,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809699804] [2024-09-20 18:55:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:08,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:08,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:08,824 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 18:55:08,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:08,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809699804] [2024-09-20 18:55:08,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809699804] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:55:08,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:55:08,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 18:55:08,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767689794] [2024-09-20 18:55:08,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:55:08,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 18:55:08,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 18:55:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:55:08,827 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. 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 18:55:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:08,850 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2024-09-20 18:55:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 18:55:08,851 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 18:55:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:08,851 INFO L225 Difference]: With dead ends: 21 [2024-09-20 18:55:08,851 INFO L226 Difference]: Without dead ends: 14 [2024-09-20 18:55:08,851 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 18:55:08,852 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:08,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:55:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-20 18:55:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-20 18:55:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-20 18:55:08,859 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2024-09-20 18:55:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:08,859 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-20 18:55:08,859 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 18:55:08,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-20 18:55:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 18:55:08,860 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:08,860 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:08,860 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:55:08,861 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:08,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash 365820639, now seen corresponding path program 1 times [2024-09-20 18:55:08,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:08,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378599419] [2024-09-20 18:55:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:08,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:08,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:08,963 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 18:55:08,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:08,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378599419] [2024-09-20 18:55:08,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378599419] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:08,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264445020] [2024-09-20 18:55:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:08,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:08,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:08,968 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 18:55:08,976 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 18:55:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:09,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-20 18:55:09,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:09,078 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 18:55:09,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:09,100 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 18:55:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264445020] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:09,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-20 18:55:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053164468] [2024-09-20 18:55:09,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:09,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:55:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:55:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:55:09,102 INFO L87 Difference]: Start difference. First operand 14 states and 15 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 18:55:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:09,126 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2024-09-20 18:55:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 18:55:09,127 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 18:55:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:09,127 INFO L225 Difference]: With dead ends: 26 [2024-09-20 18:55:09,127 INFO L226 Difference]: Without dead ends: 19 [2024-09-20 18:55:09,127 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 18:55:09,128 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:09,128 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:55:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-09-20 18:55:09,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-09-20 18:55:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 18:55:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-20 18:55:09,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2024-09-20 18:55:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:09,132 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-20 18:55:09,132 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 18:55:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-20 18:55:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 18:55:09,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:09,133 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:09,146 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 18:55:09,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:09,338 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:09,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1810326642, now seen corresponding path program 1 times [2024-09-20 18:55:09,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:09,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609678483] [2024-09-20 18:55:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:09,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:09,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:55:09,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:09,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609678483] [2024-09-20 18:55:09,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609678483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:09,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881856313] [2024-09-20 18:55:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:09,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:09,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:09,445 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 18:55:09,450 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 18:55:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:09,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 18:55:09,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:55:09,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:55:09,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881856313] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:09,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:09,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-20 18:55:09,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748843913] [2024-09-20 18:55:09,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:09,535 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:55:09,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:09,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:55:09,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:55:09,536 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 18:55:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:09,569 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-09-20 18:55:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:55:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 18:55:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:09,570 INFO L225 Difference]: With dead ends: 37 [2024-09-20 18:55:09,570 INFO L226 Difference]: Without dead ends: 27 [2024-09-20 18:55:09,571 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 18:55:09,571 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:09,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:55:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-20 18:55:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-20 18:55:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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 18:55:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-20 18:55:09,576 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2024-09-20 18:55:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:09,576 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-20 18:55:09,576 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 18:55:09,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-20 18:55:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 18:55:09,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:09,577 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:09,589 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 18:55:09,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:09,782 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:09,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:09,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1138297446, now seen corresponding path program 2 times [2024-09-20 18:55:09,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:09,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003086143] [2024-09-20 18:55:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:09,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:09,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:55:09,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:09,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003086143] [2024-09-20 18:55:09,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003086143] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:09,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187236022] [2024-09-20 18:55:09,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:55:09,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:09,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:09,895 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 18:55:09,896 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 18:55:09,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:55:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:09,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:55:09,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:55:09,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:55:10,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187236022] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:10,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:10,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-20 18:55:10,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093472732] [2024-09-20 18:55:10,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:10,049 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 18:55:10,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 18:55:10,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:55:10,050 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 18:55:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:10,091 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-09-20 18:55:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 18:55:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 26 [2024-09-20 18:55:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:10,092 INFO L225 Difference]: With dead ends: 53 [2024-09-20 18:55:10,092 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 18:55:10,093 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:55:10,093 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:10,094 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:55:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 18:55:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-20 18:55:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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 18:55:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-09-20 18:55:10,103 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 26 [2024-09-20 18:55:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:10,103 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-09-20 18:55:10,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 18:55:10,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-09-20 18:55:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 18:55:10,104 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:10,104 INFO L216 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:10,117 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 18:55:10,308 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:10,309 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:10,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash 998160974, now seen corresponding path program 3 times [2024-09-20 18:55:10,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:10,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005076153] [2024-09-20 18:55:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:10,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:10,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:55:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005076153] [2024-09-20 18:55:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005076153] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422458852] [2024-09-20 18:55:10,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:55:10,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:10,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:10,557 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 18:55:10,558 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 18:55:10,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 18:55:10,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:10,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-20 18:55:10,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-09-20 18:55:10,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-09-20 18:55:10,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422458852] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:10,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:10,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2024-09-20 18:55:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013604241] [2024-09-20 18:55:10,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:10,691 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 18:55:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 18:55:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:55:10,692 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:10,741 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-20 18:55:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:55:10,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-20 18:55:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:10,743 INFO L225 Difference]: With dead ends: 63 [2024-09-20 18:55:10,744 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 18:55:10,744 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:55:10,744 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:10,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:55:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 18:55:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-20 18:55:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 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 18:55:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-09-20 18:55:10,755 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 42 [2024-09-20 18:55:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:10,755 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-09-20 18:55:10,755 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:10,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-09-20 18:55:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 18:55:10,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:10,756 INFO L216 NwaCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:10,768 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 18:55:10,956 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:10,957 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:10,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:10,957 INFO L85 PathProgramCache]: Analyzing trace with hash -327394665, now seen corresponding path program 4 times [2024-09-20 18:55:10,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:10,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000438810] [2024-09-20 18:55:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:10,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:11,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:55:11,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:11,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000438810] [2024-09-20 18:55:11,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000438810] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:11,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640103252] [2024-09-20 18:55:11,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:55:11,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:11,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:11,200 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 18:55:11,209 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 18:55:11,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:55:11,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:11,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 18:55:11,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:55:11,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:55:11,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640103252] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:11,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:11,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-09-20 18:55:11,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292433136] [2024-09-20 18:55:11,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:11,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 18:55:11,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:11,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 18:55:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:55:11,651 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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 18:55:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:11,730 INFO L93 Difference]: Finished difference Result 105 states and 134 transitions. [2024-09-20 18:55:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 18:55:11,730 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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 52 [2024-09-20 18:55:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:11,731 INFO L225 Difference]: With dead ends: 105 [2024-09-20 18:55:11,731 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 18:55:11,732 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:55:11,733 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:11,733 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:55:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 18:55:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-20 18:55:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 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 18:55:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2024-09-20 18:55:11,743 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 52 [2024-09-20 18:55:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:11,743 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2024-09-20 18:55:11,743 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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 18:55:11,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2024-09-20 18:55:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 18:55:11,745 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:11,745 INFO L216 NwaCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:11,757 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 18:55:11,949 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 18:55:11,950 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:11,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:11,950 INFO L85 PathProgramCache]: Analyzing trace with hash 502729092, now seen corresponding path program 5 times [2024-09-20 18:55:11,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:11,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664695321] [2024-09-20 18:55:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:11,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:12,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:55:12,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:12,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664695321] [2024-09-20 18:55:12,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664695321] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:12,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216370473] [2024-09-20 18:55:12,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:55:12,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:12,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:12,627 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 18:55:12,639 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 18:55:12,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2024-09-20 18:55:12,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:12,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 18:55:12,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:55:12,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:55:14,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216370473] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:14,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:14,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-20 18:55:14,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994076257] [2024-09-20 18:55:14,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:14,129 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-20 18:55:14,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:14,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-20 18:55:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 18:55:14,133 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 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 18:55:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:14,325 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2024-09-20 18:55:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-20 18:55:14,325 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 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 86 [2024-09-20 18:55:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:14,327 INFO L225 Difference]: With dead ends: 173 [2024-09-20 18:55:14,328 INFO L226 Difference]: Without dead ends: 155 [2024-09-20 18:55:14,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 18:55:14,330 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:14,331 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:55:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-20 18:55:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2024-09-20 18:55:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0466666666666666) internal successors, (157), 150 states have internal predecessors, (157), 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 18:55:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2024-09-20 18:55:14,349 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 86 [2024-09-20 18:55:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:14,349 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2024-09-20 18:55:14,350 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 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 18:55:14,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2024-09-20 18:55:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-09-20 18:55:14,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:14,352 INFO L216 NwaCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:14,366 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 18:55:14,556 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:14,557 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:14,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash -428522082, now seen corresponding path program 6 times [2024-09-20 18:55:14,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:14,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071274684] [2024-09-20 18:55:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:14,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:16,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:55:16,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:16,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071274684] [2024-09-20 18:55:16,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071274684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:16,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863633641] [2024-09-20 18:55:16,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:55:16,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:16,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:16,636 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 18:55:16,637 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 18:55:16,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-09-20 18:55:16,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:16,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 18:55:16,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2024-09-20 18:55:17,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2024-09-20 18:55:17,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863633641] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:17,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:17,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 9, 9] total 83 [2024-09-20 18:55:17,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498331231] [2024-09-20 18:55:17,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:17,436 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-09-20 18:55:17,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:17,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-09-20 18:55:17,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2024-09-20 18:55:17,439 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 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 18:55:17,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:17,634 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2024-09-20 18:55:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-20 18:55:17,634 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 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 154 [2024-09-20 18:55:17,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:17,635 INFO L225 Difference]: With dead ends: 191 [2024-09-20 18:55:17,635 INFO L226 Difference]: Without dead ends: 173 [2024-09-20 18:55:17,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 297 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 18:55:17,637 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:17,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:55:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-20 18:55:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2024-09-20 18:55:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0892857142857142) internal successors, (183), 168 states have internal predecessors, (183), 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 18:55:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2024-09-20 18:55:17,647 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 154 [2024-09-20 18:55:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:17,647 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2024-09-20 18:55:17,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 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 18:55:17,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2024-09-20 18:55:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-09-20 18:55:17,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:17,649 INFO L216 NwaCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:17,667 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 18:55:17,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:17,850 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:17,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash 185400531, now seen corresponding path program 7 times [2024-09-20 18:55:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:17,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292527953] [2024-09-20 18:55:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:17,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:19,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-09-20 18:55:19,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292527953] [2024-09-20 18:55:19,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292527953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:19,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309219068] [2024-09-20 18:55:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:55:19,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:19,957 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 18:55:19,958 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 18:55:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:20,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 18:55:20,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-09-20 18:55:20,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-09-20 18:55:24,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309219068] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:24,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:24,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2024-09-20 18:55:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915906290] [2024-09-20 18:55:24,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:24,213 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-09-20 18:55:24,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:24,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-09-20 18:55:24,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-20 18:55:24,219 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 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 18:55:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:24,550 INFO L93 Difference]: Finished difference Result 345 states and 442 transitions. [2024-09-20 18:55:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-09-20 18:55:24,552 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 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 172 [2024-09-20 18:55:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:24,556 INFO L225 Difference]: With dead ends: 345 [2024-09-20 18:55:24,556 INFO L226 Difference]: Without dead ends: 311 [2024-09-20 18:55:24,560 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-20 18:55:24,561 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:24,564 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:55:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-09-20 18:55:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2024-09-20 18:55:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0490196078431373) internal successors, (321), 306 states have internal predecessors, (321), 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 18:55:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 325 transitions. [2024-09-20 18:55:24,578 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 325 transitions. Word has length 172 [2024-09-20 18:55:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:24,578 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 325 transitions. [2024-09-20 18:55:24,579 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 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 18:55:24,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 325 transitions. [2024-09-20 18:55:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2024-09-20 18:55:24,582 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:24,582 INFO L216 NwaCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:24,599 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 18:55:24,785 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:24,786 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:24,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2093834204, now seen corresponding path program 8 times [2024-09-20 18:55:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:24,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955591719] [2024-09-20 18:55:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:24,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:31,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-09-20 18:55:31,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955591719] [2024-09-20 18:55:31,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955591719] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356854098] [2024-09-20 18:55:31,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:55:31,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:31,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:31,908 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 18:55:31,909 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 18:55:32,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:55:32,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:32,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-09-20 18:55:32,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-09-20 18:55:32,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-09-20 18:55:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356854098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:47,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:47,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2024-09-20 18:55:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721447055] [2024-09-20 18:55:47,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:47,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2024-09-20 18:55:47,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:47,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2024-09-20 18:55:47,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-20 18:55:47,958 INFO L87 Difference]: Start difference. First operand 311 states and 325 transitions. Second operand has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 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 18:55:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:49,249 INFO L93 Difference]: Finished difference Result 621 states and 787 transitions. [2024-09-20 18:55:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-09-20 18:55:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 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 310 [2024-09-20 18:55:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:49,253 INFO L225 Difference]: With dead ends: 621 [2024-09-20 18:55:49,253 INFO L226 Difference]: Without dead ends: 587 [2024-09-20 18:55:49,257 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-20 18:55:49,258 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:49,258 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:55:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2024-09-20 18:55:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2024-09-20 18:55:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 582 states have (on average 1.0257731958762886) internal successors, (597), 582 states have internal predecessors, (597), 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 18:55:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 601 transitions. [2024-09-20 18:55:49,286 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 601 transitions. Word has length 310 [2024-09-20 18:55:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:49,287 INFO L474 AbstractCegarLoop]: Abstraction has 587 states and 601 transitions. [2024-09-20 18:55:49,287 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 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 18:55:49,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 601 transitions. [2024-09-20 18:55:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2024-09-20 18:55:49,296 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:49,296 INFO L216 NwaCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:49,313 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 18:55:49,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 18:55:49,501 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:49,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:49,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1695370490, now seen corresponding path program 9 times [2024-09-20 18:55:49,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:49,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602200051] [2024-09-20 18:55:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:49,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:20,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:56:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-09-20 18:56:20,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:56:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602200051] [2024-09-20 18:56:20,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602200051] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:56:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100589851] [2024-09-20 18:56:20,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:56:20,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:56:20,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:56:20,378 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 18:56:20,383 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 18:56:20,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2024-09-20 18:56:20,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:56:20,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 18:56:20,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:56:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2024-09-20 18:56:23,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:56:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2024-09-20 18:56:25,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100589851] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:56:25,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:56:25,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 17, 17] total 307 [2024-09-20 18:56:25,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559566409] [2024-09-20 18:56:25,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:56:25,774 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 307 states [2024-09-20 18:56:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:56:25,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 307 interpolants. [2024-09-20 18:56:25,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46971, Invalid=46971, Unknown=0, NotChecked=0, Total=93942 [2024-09-20 18:56:25,783 INFO L87 Difference]: Start difference. First operand 587 states and 601 transitions. Second operand has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 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 18:56:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:56:28,739 INFO L93 Difference]: Finished difference Result 655 states and 716 transitions. [2024-09-20 18:56:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 307 states. [2024-09-20 18:56:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 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 586 [2024-09-20 18:56:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:56:28,743 INFO L225 Difference]: With dead ends: 655 [2024-09-20 18:56:28,743 INFO L226 Difference]: Without dead ends: 621 [2024-09-20 18:56:28,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1145 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=46971, Invalid=46971, Unknown=0, NotChecked=0, Total=93942 [2024-09-20 18:56:28,746 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:56:28,746 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:56:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-09-20 18:56:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2024-09-20 18:56:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 616 states have (on average 1.0503246753246753) internal successors, (647), 616 states have internal predecessors, (647), 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 18:56:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 651 transitions. [2024-09-20 18:56:28,766 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 651 transitions. Word has length 586 [2024-09-20 18:56:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:56:28,766 INFO L474 AbstractCegarLoop]: Abstraction has 621 states and 651 transitions. [2024-09-20 18:56:28,767 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 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 18:56:28,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 651 transitions. [2024-09-20 18:56:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2024-09-20 18:56:28,773 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:56:28,773 INFO L216 NwaCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:56:28,785 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 18:56:28,973 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 18:56:28,974 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:56:28,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2064777747, now seen corresponding path program 10 times [2024-09-20 18:56:28,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:56:28,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028115303] [2024-09-20 18:56:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:56:28,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:56:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:57,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:56:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2024-09-20 18:56:57,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:56:57,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028115303] [2024-09-20 18:56:57,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028115303] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:56:57,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97619997] [2024-09-20 18:56:57,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:56:57,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:56:57,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:56:57,864 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 18:56:57,865 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 18:56:58,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:56:58,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:56:58,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 277 conjuncts are in the unsatisfiable core [2024-09-20 18:56:58,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:56:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2024-09-20 18:56:58,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:57:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2024-09-20 18:57:59,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97619997] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:57:59,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:57:59,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2024-09-20 18:57:59,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049346496] [2024-09-20 18:57:59,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:57:59,081 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2024-09-20 18:57:59,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:57:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2024-09-20 18:57:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-20 18:57:59,111 INFO L87 Difference]: Start difference. First operand 621 states and 651 transitions. Second operand has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 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 18:58:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:58:05,902 INFO L93 Difference]: Finished difference Result 1241 states and 1578 transitions. [2024-09-20 18:58:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2024-09-20 18:58:05,903 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 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 620 [2024-09-20 18:58:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:58:05,907 INFO L225 Difference]: With dead ends: 1241 [2024-09-20 18:58:05,907 INFO L226 Difference]: Without dead ends: 1175 [2024-09-20 18:58:05,917 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1519 GetRequests, 966 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 78.4s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-20 18:58:05,917 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:58:05,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:58:05,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2024-09-20 18:58:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1175. [2024-09-20 18:58:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1170 states have (on average 1.0264957264957264) internal successors, (1201), 1170 states have internal predecessors, (1201), 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 18:58:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1205 transitions. [2024-09-20 18:58:05,950 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1205 transitions. Word has length 620 [2024-09-20 18:58:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:58:05,951 INFO L474 AbstractCegarLoop]: Abstraction has 1175 states and 1205 transitions. [2024-09-20 18:58:05,952 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 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 18:58:05,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1205 transitions. [2024-09-20 18:58:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1175 [2024-09-20 18:58:05,959 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:58:05,959 INFO L216 NwaCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:58:05,974 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 18:58:06,159 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:58:06,160 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:58:06,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:06,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1562100468, now seen corresponding path program 11 times [2024-09-20 18:58:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:58:06,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115078736] [2024-09-20 18:58:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:58:06,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:58:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat